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Dual channel RAM question - Bandwidth versus capacity

Q: Dual channel RAM question - Bandwidth versus capacity

I recently purchased a new system with a Gigabyte GA-K8N51GMF-9 mobo and an athlon 64 2ghz. The bus is supposedly 2000mhz. It supports up to 2GB DDR400 RAM, or up to 4GB DDR333 via 4 dual channel slots.

Now looking to buy RAM, I came up with an intersting question for my budget.

I could either get 1GB(2x512), at 333mhz each. Filling up two slots. So I'd have 1GB at 666mhz bandwidth.

Or, for the same price, I could get 4x128's for 512MB, but at 1332mhz.

I googled but couldn't seem to find any real bandwidth vs capacity comparision like that.

Which would provide better over-all preformance?

Note: Since that time I have found a better deal. 4x256 for a total of 1GB, and all four slots filled. 1332mhz total. I belive I'm going to go with that, but still haven't found an answer to my question, so I figured I would ask here..

Is capacity more important than bandwidth. Or would more bandwidth benefit more for general preformance than capacity would?

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A: Dual channel RAM question - Bandwidth versus capacity

Is this a gaming PC?

Here's what I would recommend.






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I have a new mobo on the way, it's a;
XFX GeForce 8200 Motherboard - NVIDIA GeForce 8200, Socket AM2 / AM2+, MicroATX, Audio, Video, DVI, HDMI, PCI Express 2.0, Hyrbid SLI, USB 2.0, eSATA, RAID, CMOS, DebugLED Displayoard

Going to be running the AMD Athlon 64 X2 5000+ 2.60GHz Black Edition Socket AM2 Processor and the XFX GeForce 8500 GT Ultra Silent Cooling Video Card - 512MB DDR2, SLI Ready, PCI Express 1.0 x16, (Dual Link) DVI, VGA, HDTV

and it is coming with this ram;
Crucial 2048MB PC5400 DDR2 667MHz Memory
Crucial 1024MB PC5400 DDR2 Memory

URL for the barebones kit is here;

Now I know these won't run dual channel but I have a pair of 800mhz corsair high performance 1gb sticks that are designed to run dual channel.


(Corsair XMS2 TWIN2X2048-6400C4 2GB 2X1GB PC2-6400 DDR2-800 CL 4-4-4-12 240PIN Dual Channel Memory )

I'm definitely going to install the two corsair memory sticks. However I'm wondering if I would be loosing out by also throwing the 2048 stick into a third slot to max out my 32 bit vista home premium at 4 gigs of ram. If I put in the third stick would I loose alot of speed or my dual channel capabilities?

What do you people recomend? I am upgrading mainly for DV re... Read more

A:Question about ram speeds, dual channel, and max benefit/capacity

Throwing a third DIMM into the mix should disable Dual-Channel operation, and force your high-end RAM to run at the same speed as the low-end 2048MB DIMM. Therefore leaving you with 50% more RAM, but 50% less bandwidth and 16% lower clock.

I would avoid this scenario. Vista runs just fine on 2 gigs of good RAM.

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Hi Right now i have 8GB of RAM (4+4) and i want to upgrade it with one 8gb chip and create 12 GB of memory (4+8). My question is - will they work in dual channel mode? The speed, manufacturer and model of both chips will be exactly the same - the only difference will be the capacity 4GB + 8GB.Is there a chance that this would work?Thanks in advance

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I'm facing an unusual predicament at the moment. I currently have Windows 7 Ultimate installed on my custom tower. The tower runs an Intel Pentium 4 2.80 ghz, the OS is 32 bits, and initially was installed with one gig of RAM (2 512MB sticks) dual channel (DDR [1]).

Windows 7 wasn't sluggish, surprisingly, and I used the upgrade advisor to determine if my system was ready and I found it was. I was hoping to add a little "juice" so I tore into an old system and found a 1GB stick of DDR RAM. Now, I can change the dual channel configuration to single channel operation and run 2Gigs of RAM or I can keep the dual channel at 1Gig.

I've read on Tom's Hardware that the difference wasn't noticeable in dual vs. single but I also know that my processor was built for dual channel. Are there any recommendations? Make the single channel upgrade or keep the dual channel configuration?

At some point I will likely purchase another chip but for the time being I'm curious about anyone who has been in my position or knows memory well enough.

Thanks for any input!

A:Solved: Dual Channel/Single Channel RAM Question

depends on you applications. When math is very important, dual channel might out weigh more RAM. If the system is generally sluggish, then more RAM is more important than dual channel.

Honestly, With Vista/ 7... I'd bump to 2GB period.

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Hello forum first time here. I have a rather important question.

I currently have Corsair Vengeance memory in my PC

This memory is Triple Channel

I also have 8GB of GsKill dual channel memory. Since i have 1 extra slot left on my Mobo i was gonna use 1 of my old GsKill sticks to give my PC 14GB of ram. There identical except brand and dual / triple channel. Does Dual / Triple channel prevent these from working together?

Thanks in advance.

Corsair Memory Link: http://www.newegg.com/Product/Product.aspx?Item=N82E16820233146&Tpk=CMZ12GX3M3A1600C9
G.SKILL Memory Link: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231193&Tpk=F3-12800CL9D-4GBNQ

A:Dual Channel & Triple Channel Question

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I just bought a Dell Studio XPS with an Intel Core i7 chip and fell into the trap of buying 8GB of DDR3 SDRAM (config 2x2GB/4x1GB), which has to be dual channel. My understanding (now) is tri channel is a better way to go. Dell will not refund or exchange sticks.

Dell tells me that the mother board will support tri channel. Can I convert to 6GB tri channel simply by pulling out 2 1GB sticks and creating a 2, 2, 1+1 config, or would it have to be 3 2GB sticks. In the same way, could I buy another 1GB stick from Dell and create 9GB tri channel using a 2+1, 2+1, 1+1+1 config (or does it have to be 3 3GB sticks)?

How does 8GB dual channel compare with 6GB or 9GB tri channel memory?

Are tri channel memory sticks inherently different from dual channel sticks?

A:Question: Dual channel vs. tri channel SDRAM

Hi milrobo,
just to add to what Rick said about memory amount, have a look at this test.

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I've been running Kingston HyperX 240-Pin DDR2 675 (PC2 5400) Dual Channel SDRAM for over a year now. I just realised that it is only running in Single Channel mode. I'm pretty sure it's because my mobo Foxconn 915A01-P-8EKRS only supports Dual Channel with a bandwith of up to 533 (PC2 4200). My question is, if I purchase the 533 version will I be able to run the new pair with Dual Channel while running the old pair with Single Channel?

(I know that the old pair will probably jump down to 533 also.)

Also, do you think it would be worth it for $100? Is there a noticeable difference?

Thanks for the help.

A:Mixing Dual Channel Pair and Single Channel Pair Memory question

need more specs

does your mobo have 4 ram slots if so use the 1st and 3rd that should run it in dual channel !!

also make sure you on have 2 sticks in not 3 :slurp:

and the answer is to your question what ever the lowest speed ram is. the other ram will be clocked down to run at that same speed the lowest speed
takes the rains !!!
and you will notice the difference running dual chanel

but for reall speed difference ditch your ram and buy GEIL ULTRA

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I have a MSI K8NGM2-FID board (Athlon 64/3000). I put in two Corsair 1GB PC3200/400 MHz DDR 184-pin two-sided memory sticks in the first two slots, one green/one purple, i.e., making dual channel. So far so good. Since I had a similar Kingston two-sided KVR400/512 laying around, I decided to get another that was on sale. However, I discovered after opening the package that this new stick with the same number (and voltage) is one-sided. The two work, 2944mb now showing, but I wonder if this is still dual channel operation. How can one tell if the memory configuration is working as dual channel? Thanks.

A:Dual Channel question

I have two ideas:

Sometimes when booting it will show you a rundown of your current memory settings (about the same time as the option to load into BIOS) where it shows your memory size and on mine it shows it as being dual-channel too.

If that doesn't show it my first thought is CPU-Z.

If you download that and run it then check the Memory tab, in the general box it will have the type of RAM and across from that it'll show the channels the RAM is running on. For instance it should say "Dual" in that textbox.

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If I have 2 sticks of PC 3200 and 2 sticks of PC 2700 and I put them both in respective Dual channel slots on the mobo will the 2 sticks of PC 3200 auto clock down to 2700 frequency? Or will they stay the at PC 3200? I'm thinking they will downclock because if you have a stick of 3200 and one stick of 2700 the 3200 downclocks....

A:Dual Channel Mem question

yes the the pc3200 will run at the pc2700 speed

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I finally got around to getting a "suitable" system put together, but even though it works, I just don't understand it. I'm hoping someone can give me a dumbed-down explanation.

I built my system using a Gigabyte GA-P35-S3G motherboard, with a Pentium D 965, and four 512MB 1066MHz DDR2. Oh, and of course, a GeForce 8600GT PCIe with 512MB.

Now, as I always understood it, if you use 4 512MB sticks, running at dual channel, you get 1GB running twice as fast. Apparently either I was wrong, or the motherboard's screwed. Because I'm showing 2GB at Dual Channel. Can someone explain this to me?

A:Dual-Channel RAM question.

dual channel is why there are chips on both sides of the dimm.It runs smoother. but you would have been better off buying a 1 x 2gb stick which would give it better performance.
each stick you use means it takes longer to go round the mulberry bush if you get what I mean. eg: I x 4 GB is better than 2 x 2GB

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I have a gigabyte ep45-ud3r motherboard that supports dual channel ram and currently have 2x1gb OCZ 1066MHZ matched pair in the yellow slots. I just bought the same brand and speed ram today but in 2x2gb sticks for a total of 6gb. My question is which slots should I put the new RAM in for the best performance with the current RAM. Thanks

A:Dual channel RAM question

Dual channel allows the computer to access both banks at the same time thus doubling the effective bandwidth. Only works if the sticks within each bank are identical.
bank 1 = slot 1 + slot 3
bank 2 = slot 2 + slot 4

Would work with 4 sticks but two sticks is more stable.

That's as far as I know.

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My mobo is an Asus A7N8XE-Deluxe, which has 3 memory slots. I currently have 2x512MB memory plugged in but I want to add an extra GB since I just installed Vista. Now, here is the hard part.

There are 2 blue memory slots and 1 black memory slot. All DDR. I currently have the 2x512MBs in the 2 blue memory slots. If I wanted to retain the Dual Channel, would I have to buy a 1GB Chip to stick in the black slot?

This has always confused me with this board. Thanks!

A:Dual Channel Question

If you put a 1g ram in the black slot you will lose the dual ram but I doubt you would notice the difference.
If you want to retain dual channel you will need to buy two 1g of ram/

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Hey guys! Moose the meat popsicle here, and I have what may very well sound like a stupid question.


So I have an Asus P4S800D-X mobo, and "building" my first system from the proverbial scratch. I've scoured the interwebs, yet cannot find a definite answer to this possible strategy.

I have bitten the bullet, and bought some matched pairs of OCZ Platinum RAM off the ebay. I'm an extremely cheap bastard, so I will usually wait for months to get a deal. There's no way I could pay retail for OCZ, not that it's not worth it, I'm just too cheap.

And my mobo has 4 slots. 2 blue, 2 black. I understand that I'm to put the 2 matched 512Mb(stop laughing!) sticks in the blue slots in order to achieve "dual-channel", but when I go to upgrade to some more RAM, does it have to also be 2x512Mb? So all 4 slots are "equal"?

If that didn't make any sense, let me ask it this way.....

Will my mobo recognize two additional sticks of paired RAM if they are larger? Like instead of 2x512, I get 2x1GB? Could a nearly double difference in RAM "size" confuse my mobo?

Should I move the smaller guys to the black slots, letting the bigger guys nest in the blue slots? And out of curiosity, why would it make any difference.

And let me also state that any opinions offered would be greatly appreciated, as I see there's other people in here with much bigger fish to fry. So....thank you to all!

And h... Read more

A:Dual-Channel RAM question

The channels should be balanced for correct dual channel operation; IE, 256 blue 512 black for each pair of sockets.

The only thing that is true in all cases is the socket nearest the CPU must be populated or no bootie.

Different boards react differently to unbalanced RAM. A board might successfully run in "dual channel interleaved mode" with 1GB in one channel and 1.5GB in the second channel. In this example only 2GB (total) would run in actual dual channel, the "upper" 512MB in channel two would run in single channel mode. It would be accessed only after the "lower" 2GBs were in use.

The situations above are based on Intel's explanation of dual channel operation, with their chipsets in their boards. Different boards have different quirks. But, to a certain extent, you can even mix different speed DIMMs, and still have dual channel operation. But, the timing and the voltage must be the same for all the sticks you are using.

I have mixed and matched different capacity and speed DIMMs and still had dual channel operation. As always, your results may vary.

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I currently have a 1GB (2x 512MB) setup going, but I was wondering if I bought the exact same ram so I could have 2GB (4x 512MB), would it still be in Dual Channel?

A:Dual Channel RAM question

Yes, it will--in two memory channels, but still in dual channel:

Here's a pretty good explanation:


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I'm building a new system and I was wondering if I could boot up my computer with 1 stick
of ram on a dual channel mobo. The mobo will take 4GB of ram in total. The board is a Asrock 939 Dual-Sata2 and it will have a AMD 3200 CPU. I will not be running the system long
just want to check whether all the componets are working.
Any info appreciated, Thanks

A:Ram question Dual Channel

yes you can

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I haD 2 sticks of KINGSTON HYPER X ram (whatever in the heck that means), 512MB a piece. They are DDR 3200.

A few days ago I bought a 1 gig stick of GEIL 3200 ram (model# GE1GB3200BSC) from FRY's ELECTRONICS.

I have an ABIT motherboard (model VT7) and I have the Kingston 512 modules in slots 1 and 3.

I know the new 1 gig module wont be dual channel but I want to know is, if I stick the ram in slots 2 or 4 will I still continue to get dual channel from the alreay existing Kingston ram in slots 1 and 3.

Also if you say no, if I put another 1 gig stick in (2 512's and 2 1gigs) will that reap DUAL CHANNEL?

I wanted to know because I cant open it and try without forgoing the return policy.

I also lost my manual

Please help thanks.

A:DUAL CHANNEL ram question

Every Motherboard is different. Some will still dual channel the one set even with a third piece of memory in there. You really need to consult the manufacture/manual.

Try this

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Alright well currently my Samsung R580 has an i5 and whatnot.
It has 4GB Ddr3 Dual Channel RAM.. (2x2GB)

Checked CPU-Z and they are PC3-8600 (533Mhz) If anyone wants to know..

I wanted to up it to 6gb or so, by keeping in one of the 2GB sticks and chucking in a 4GB stick with it.

Question is, will it natively run at Dual Channel given that I get the right speed to match it?

And primarily..will I notice any possible performance increase? Is it worth the $50?

I game mainly, and surf the web.

A:Dual Channel with RAM question!

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Hi guys,

I've been thinking about returning my two 512MB Value Select sticks, and get a 512MB X 2 Dual channel kit.

But my main question is:
If I get another 512 X 2 kit in the future, and if Corsair changes again the revision, will I be able to enable dual channel? Do all the 4 sticks have to be INDENTICAL?

Thanks :wave:

A:I have a question about dual channel...

the pairs have to be identical.
2x512=the same
2x1 (4 example)=the same
and make shure you put the memories in the correct place.

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I have a mobo that supports 2 lots of Dual Channel DDR.

I have 2 x 512mb of G.skill Dual Channel Ram 2-3-3-6

My question is because the board takes 2 lots of dual channel do they have to be the same brand or does just the timings have to be the same.

IE, I have 2 x 512mb G.skill 2-3-3-6 and now have 2 x 512mb corsair 2-3-3-6.

Is that ok?

A:Dual Channel Question


ITS FINE... I try to stay with same brand as possible but in your case its ok...

as long as the MGz... and timings are the same

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I am building my new computer and I have ran into a little trouble. The heatsink for my cpu looks like it could possibly be in the place of the DIMM_A1 slot on my motherboard. I have dual-channel ram and I wanted to know if I can install the ram in dual-channel config in the B channel instead of the A?

Motherboard: A8V-E Deluxe


A:Dual Channel Question

Noble said:


I am building my new computer and I have ran into a little trouble. The heatsink for my cpu looks like it could possibly be in the place of the DIMM_A1 slot on my motherboard. I have dual-channel ram and I wanted to know if I can install the ram in dual-channel config in the B channel instead of the A?

Motherboard: A8V-E Deluxe

NobleClick to expand...

Have you read your motherboard manual or website for more information before you post this threads?

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Ok, i want my computer to be fast and have alot of RAM.

So can i put this RAM in and .............
........have all 4x sticks of 512mb (2GB total) RAM run in Dual Channel? I am asking about this configuration b/c i want my computer to be fast as possable with timings 2-2-2-5. And larger sticks of RAM 2x1GB for example have slower timings.

Btw, yes the board im going to buy supports Dual Channel DDR.
Da Bob

A:Dual Channel DDR Ram Question?

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I've got 2x512MB Patriot RAM in a dual-channel setup on my mobo. I've also got a random stick of 512MB RAM that I was using before the Patriot stuff was installed. Since you can't have all three installed and still have dual-channel set with the Patriot RAM, is it more beneficial to have 1.5GB RAM that isn't dual-channel, or only 1GB dual-channel RAM?

A:Dual Channel RAM question

Try both out & see which setup works best for you. That's the only way to find out.

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I've got an Intel D865PERL MB that currently has 4/512 cards installed. One of them is showing errors and I was thinking of replacing two of them with 2/1 gig cards. Do these need to go into slot 0 and slot 2 and then have the 512's in slot 1 and 3? Or should I put the 2/1 gig cards into slot 0 and 1. The Hound mentioned that my system is Dual Channel and that he thought the cards needed to be matched in slot 0 and 2 as well as 1 and 3. Any help in this department would be great, I don't know much about hardware.

Thank you in advance for your time!


A:Dual Channel RAM Question

websailer said:

Or should I put the 2/1 gig cards into slot 0 and 1.
Click to expand...

On most motherboards, no.

websailer said:

Do these need to go into slot 0 and slot 2 and then have the 512's in slot 1 and 3? The Hound mentioned that my system is Dual Channel and that he thought the cards needed to be matched in slot 0 and 2 as well as 1 and 3. Click to expand...

Yes, that's the correct way to do it on most motherboards. Look at your motherboard manual for more details.

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Building myself a new comp, and was wondering something...

Will 2 1gig sticks of ddr400 ram run in dual channel mode, or would I have to go with 4x512 sticks?

I really don't want to have to completely fill up my memory slots on my mobo in order to get my 2gb dual channel going, but I will if I have to.

Any takers?

A:Dual Channel question

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i was wondering what exactly does duel channel ram mean?
I have an AMD HP Media Center PC
AMD X2 Duel Core 2.20ghz
2 gig 1gigX1gig ram DDR3200 /4 dim slots up to 4ghz
Mobo Amythyst MS7184
is Dual channel compatible

also wondering if I add and extra 512 in the 3d slot and leave the 4th empty does that disable duel channel? does it have to be 2 and 2 in order to work? and what would be the difference if i added the 512 and it did disable duel channel? is having it duel channel make it any better then just adding the extra 512 to the memery. and do they both have to be 512 or can i put 512 and a 256 in the other 2 to make duel channel work?

A:Dual Channel Ram question?

Dual channel just means two data channels at one time. Adding a third stick would probably remove the dual channel functionality. As far as I know, dual channel does very little on AMD systems, due to the on-die memory controller of the CPUs. You probably wouldn't notice any performance difference.

You already have 2GB of RAM, why do you want to add another 512MB.

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I have an Intel D945PSN motherboard and it supports dual channel ram. Right now I have one DDR2 1GB 533 MHZ module in there. While ordering a new monitor from tigerdirect, I seen a good deal on dual module ram for 29.99 so I bought it. The question is about the speed difference. This ram I bought is 677 MHZ but my old stick is 533. Will this be a problem? This board has 4 slots. 2 for channel a and 2 for channel b. I was going to put the 2 dual sticks in A and the 1 stick in b. Will the board take all the ram down to the lowest speed? I will recieve this on Tuesday, but I wanted to do some research before I start.

I have a P4 630 is you need to know the CPU.

A:Dual channel ram question

Nevermind. I already found my answer.

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Hiya all.

I have a P4 Dual processor 3.4Ghz currently with 2x512MbDDR in a dual channel configuration.
I have recently acquired 2 extra 512Mb memory which I was going to use and give me 2Gb of RAM. However one of these memories after running the windiag test is faulty.

Now. Can I have 3 sticks in place, and what will this do for performance, or would it be better to have the 2 in a dual configuration set up? and leave the spare 512Mb out?

Many Thanks in advance.

A:Dual Channel RAM question

Don't know your motherboard but if you have a slot for it and it is compatilble for that board then I would put the in the extra Ram (memory)

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Here's the problem, I'm building my new PC as we speak and I bought this mammoth cpu cooler (which while I knew it would be big I didn't read any reviews stating it covers a memory slot) which fully covers up my first ram slot and the heat spreader is too tall on the memory to try and weasel it in there. The Gigabyte's instructions tell me that there are two "dual channels" one using 1 and 3 and the other using 2 and 4. I installed the RAM into 2 and 4 because there is no other way for it to work. Is there any reason I wouldn't get the same performance out of slots 2 and 4 as opposed to 1 and 3?

A:Solved: Can dual channel memory be installed in channel 1 rather than channel 0?

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Just updated my VIA Tech. Chipset and found this under the VIA Bus Master PCI IDE Controller:

The Settings tab for this device shows the following options:
Default (to which it is set)
Both IDE channels enabled
Only Primary IDE channel enabled
Only Secondary IDE channel enabled
No IDE channels enabled

Have HDD and CD-ROM (slave) on Primary IDE and CD-R/RW (master) on Secondary IDE. System is:

AMD K6-2 450MHz
256 RAM

Which would be the BEST option to choose? Thanx GRM

A:Question about Dual IDE Channel Settings

Is everything working with your current settings?

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Hi all,

I'm building a new system and sweating over motherboards and such, but my main question is Dual Channel RAM. Okay, don't flame me too badly..

I know that the chips have to be identical and paired up, but does that mean it works like some RAID systems? That is - if I install a pair of 512MB sticks, does the system see 512MB total or 1GB total?



A:Probably stupid Dual Channel RAM question

The system will see 1GB w/2 512mb

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I am running two sticks of 512 megs each dual channel on an Intel 865 Perl mobo. Being a bit dumb I recently bought a new to me 256 meg 9800XT video card. It has a humongous heat sink top and bottom and won't fit in with the ram where it is. I tried it on my msi mobo, no go and I can't move the ram on that one as my last ram slot is cooked. The Intel board I want to try it on has A0 A1, B0 B1 in that order. I have the ram right now in A0 and B0 to run in dual channel and all is running well. I am wondering if I can move the ram to A1 and B1 with no trouble. I thought I would ask before I start pulling the machine apart since it is working perfectly at the moment, if there is no great chance of this working well then I really don't want to fritz around with it. This is the only way though I could even possibly get this thing to fit in here, and even then I am not sure.
Thank you all very much in advance.

A:before I screw something up question ( dual channel ram)

In order for Dual Channel RAM chips to operate as such, they have to be installed in the Dual Channel slots (check your MOBO manual). In any other slots, the Dual Channel function will not work....but the memory will function.

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My motherboard supports dual channel DDR but I'm not sure how to use it. I don't see any reference to it in the bios and the motherboard manual isn't clear on its setup. How do I activate dual channel mode? Does the memory controller automatically do it?

A:Dual Channel Memory Question

what is the make and model of your motherboard? if you have 4 Ram slots and are using two sticks of ram then slots 1 and 3 should hold the ram for dual channel operation.

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Ok what does this mean:
"If only one memory module or three memory modules are installed
in the DDR3 DIMM slots on this motherboard, it is unable to activate​the Dual Channel Memory Technology."

Does this mean i have to install two sticks of ram for it too boot or am i able to place one stick of ram if it helps i have a Asrock M3A77ODE motherboard and the ram im going to be getting is DDR 1333 4 GB just one stick.

Edit: Also do ide to sata converters work?

A:Dual Channel Memory Ram question

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Currently I have 512mb of dual channel Pc3200 Ram. My question is

If I upgrade would it be better to buy 512mb Of dual Channeled Or 512mb of just single channeled. I ask this because If i decide to upgrade my Ram again, I leave This RAM useless. Sorry if this is confusing.

A:Question about Dual Channel Ram and Upgrades...

Well there is no "single channel RAM" or "Dual Channel RAM". If your board has dual channel capabilities then you can run 2 identical sticks of RAM in dual channel mode.

I assume you have 2 x 256Mb right now. In my opinion it would be best to get a new set of 2x 512Mb sticks instead of adding another 2 x 256Mb.

You can find a good 1Gb dual channel kit for under 100$.

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For a while ago I built a new system. The specs are in my "My Computer" tab. After having assembled the system and booted it up for the first time, it would not POST. The components would run, the fans would spin, but it just wouldn't go past the first black screen in the boot process. After quite a bit of head scratching, I sent it back to the shop from which I purchased the parts. They did some digging and came up with the simple problem that a few misplaced motherboard screws had casued a short circuit between the board and the case. When I got it back and opened it up, however, I also realized that the two RAM sticks were NOT installed in a non-dual channel mode, i.e. one in a blue slot and one in a brown slot, instead of both of them in the two blue slots. I had installed them in a dual channel fashion. I shrugged and installed them back the way they were. Tried to boot up, same issue as before. I put them back the way they were when they came back from the shop, and voila, it booted just fine.

I later found out that the memory I had chosen was optimized for "Motherboards using the Intel chipset". Could this have had something to do with it? Am I just crazy, and should the RAM actually work just fine with my mobo? The reason I'm asking is because I've been having some stuttering/loading issues and wondering if my RAM configuration could be the problem. So what do you think? Is the RAM wrong for my MOBO? Should I open it up and slide t... Read more

A:Solved: RAM Dual Channel Question

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I have been having some memory issues and I am going to run some memory checks tonight to find out where the culprit lies.

I am running 2x 500mb and 2x 1gb sticks. I believe the culprits are one of the 1gb sticks. My question is, if I find that only one of the sticks is in error, will I be able to simply remove one of the sticks and still run the other two as dual channel? I have a friend that says he's not sure if you can run a single stick of dual channel memory without it's mate (if sold in a kit). I don't know if that's true or not... so I'm coming to you guys (and gals) for help.

A:Dual channel memory issues and question

There is no such thing as Dual channel Ram
ie all Rams single, double or triple (whatever) will work
But your motherboard supports 2 Ram cards making Dual Channel (making them quicker)
Single Ram cards will therefore not utilize Dual Channel, but will still work

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Hey everybody!

I'm having a system built, and one of the components is a 4GB (2x2GB) dual-channel kit. I'm installing this on an XP 32-bit system however, and while I am fully aware that XP32 only recognizes roughly 3.5GB, I had a question.

Will XP32's inability to recognize the full 4GB adversely affect the RAM's dual-channeling? I would think that it wouldn't since XP only uses RAM as the user does, but I'm not entirely sure and thought I should ask.

As always, thanks in advance,

A:A Quick Question About Dual-Channel 2x2GB RAM and XP 32-bit

No, it won't affect it.

By the way, the problem isn't with Windows, the problem is with the processor. If it is running in 32-bit mode, it can only address 4 GB (2^32). From that, you have to subtract all the RAM for all hardware devices (they have to be addressed by the processor too), and the swap file. What's left is reported to Windows (or whatever OS you are using).

Go 64-bit (2^64) and you have a whole lot more addressable RAM.


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There are several cases I've wanted to install memory in pairs to achieve dual-channel memory speeds, but I've come across a caveat or two about whether or not this is worth it.


How do I calculate whether or not the FSB is fast enough to take advantage of the memory speeds. I'll see cpuz refer to things like FSB:memory as "1:2", which I'm not sure refers to the memory controller taking advantage of the up and down side of the clock waveform, or if it's saying "give up, we're half the speed we need".
How do I calculate dual core beasts? Do the internal 2 "processors" share the FSB, or do they each have their own resulting in double access speed [attempts] to dual ported memory (note, not dual channel).
Forgive me please, my questions may be tripping all over themselves. It's been a longgggg time since I've calculated any of this out during my stint as a DSP software engineer.

I'll be glad to rephrase this in any way you all like.

A:Dual-Channel & FSB: Calculating the bottlenecks (Is Dual Channel Worth it???)

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dont know the motherboard yet as i will not be getting the pc in the mail until friday, however my question is about Dual-Channel DDR2 RAM

my mobo will have 4 DIMMS capable of 1GB each for a total of 4GB
it will be stock with 2 512MB DUAL CHANNEL DDR2 PC5300 667MHZ sticks
can i add 2 more aftermarket 512MB DUAL CHANNEL DDR2 PC5300 667MHZ sticks and maintain DUAL CHANNEL performance, for a total of 2GB instead of 1GB?

if so do they have to be the same latency, if so how will i determine latency as this is a DELL XPS GEN 5 pre-assembled?

or would i be better off removing the 2 512MB original sticks, selling them on ebay, and putting 2 sets of brand new CORSAIR Memory 2 x 512 MB PC2-5300 DDR2 RAM DUAL CHANNEL MATCHED PAIRS???

Pentium D830 (3.0GHZ),DCT
48X CD-RW/ 16X DVD+/-RW

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Ok, so here it is...

I decided to buy a whole new system, payed around 300 for it plus about 50-70 for extra HDD and GFX card plus mouse keyboard etc

Motherboard = Fatal1ty FP-IN9 or sumthin like that

My problem is, it came with XP, i formatted it, put win 7 ultimate 64-bit on, installed new SATA drive + GFX card. And then when i started using it i kept getting blue screens every so often and random reboots when playing games

i swapped the gfx card back with the one that came with it, no diff, same with the HDD.

So, i decided to test the ram with memtest 86 (Doing 2 sticks at a time on the dual channel na dthen each 1 by itself) had no problem what so ever. all tests passed with flying colours each time left overnight for about 11 hours.

So i then decided to try Memtest 86+ with all 4 sticks in (each stick is 1GB DDR2 800MHz)

next morning i get up and had litrally around 69 MILLION errors... however, i have found aslong as i have 3 sticks in at a time it all works fine, but with 4 i get the bluescreens... until now, i decided to put the 4th back in and now every seems peachy

Now i have just a few minutes before starting this post loaded up Sandra Lite hardware scanner... n here is what i saw..........

So am i right that the 1st stick is running at 3584 Mhz

and the other 3 at 1024Mhz???

If so then this overclocking is done in the Bios, right? (I cannot find this setting tho)

Im guessing the differant clock speed with the dual channel setup is what was causing... Read more

A:Windows 7 Ultimate 64-Bit Dual Channel RRAM question?

Bank 1 seems to be reporting the full installed memory
minus the vide card memory.
The 1024 is the true memory size,
Might check on that motherboard.
That is reporting you can only have 2GB installed.
Which sounds off for a newer motherboard.

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Hey soo I have a question about installing my memory on my motherboard. These are the parts i have put together:

all brand new built last year:

Abit AX8 VIA K8T890 Motherboard socket 939
AMD 64 Athlon 3000+
Corsair XMS 2x512 DDR Dual Channel TWINX1024-3200C2PT

so basically I built this computer last year and have had the memory in slots 3 and 4. But today I was reading an article and it seems that in order to actually take advantage of my dual channel ram i need to put the memory in slots 1 and 3. I don't know why I waited so long to examine this but I was wondering if someone knew if i want dual channel support what do i have to do? What slots do i need to put the ram into?

When i tried booting up with the ram in slots 1 and 3 just as the article said..it booted up okay but there was nothing showing up on the monitor just black as if the video card wasnt being read or something. Also the boot state (number on the mother board) was CO or C0. So after this happened i just turned it off (hard stop). Just wondering if anyone had any ideas on how to get my dual channel ram working...do I need to change settings in the bios? Is my motherboard actually running dual channel with slots 3 and 4?

Any help or advice would be GREATLY appreciated! Thanks! =)

A:Abit AX8/dual channel memory question - no display, stuck on CO boot code

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Thought I'd share this here since I just learned something new today, and invite any feedback you might have.

After having Adelphia "high speed" internet for about a week and getting the full expected download/upload speeds they advertise (as measured locally using Speakeasy) -- I decided, for the trial period anyway, to try the "premium" high speed connection -- which provides about a 50 percent boost in download/upload speeds.

Think this would also improve online gaming pings by the same amount?

Think again!

There is absolutely no difference in ping rates that I can see at the servers I poll.

Moral of the story: these are two different things. The first measures how much data you can upload or download per second.

The second measures the to and from response time from a given server.

This undoubtable depends on both routing and the individual server's optimization. Evidently a 4 mb bandwidth maxes out what ever they can handle.

It's not yet clear to me wether the increased bandwidth still improves gaming performance and smoothness.

A:Ping versus Bandwidth

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Hey Everyone,

I am brand spankin' new here, and I have a question for someone out there. I currently have a SOYO motherboard (which I have been having issues with) and I am going to be switching to a ECS Elite Group board in a few weeks. My question is, when I bought RAM for my SOYO I bought Patriot Dual Channel DDR 3200 1gb pair, but the ECS board I am switching to does not support Dual Channel, so can I still use the the 2 512 sticks normally on the new board or I do I have to get new memory or a different board? I would think it would just run them as 2 sticks of 512, but I am not sure and I wanted to know if anyone else knew this or not?

Thanks in advance for any help (and sorry if I missed this being posted somewhere else, I did try and search for the answer but didnt see anything).


A:Dual Channel DDR on NON-Dual Channel Motherboard, will it work?

rmsilver7 said:

when I bought RAM for my SOYO I bought Patriot Dual Channel DDR 3200 1gb pair, but the ECS board I am switching to does not support Dual Channel, so can I still use the the 2 512 sticks normally on the new board or I do I have to get new memory or a different board?Click to expand...

1. Yes.
2. No.

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My ASUS P4V8X-X Motherboard does not support running in dual channel mode. But can I still run dual channel DDR PC3200 400mhz non-ecc unbuffered ram in it? Seems I could, but I won't have the additional performance gains of running in dual channel mode. Does anyone know for certain if I can or can't?

A:Solved: Dual Channel ram in a dual channel unsupported mb.....?

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My spec is in my profile, but I will also list it here.... I just noticed today that my RAM was running Single Channel mode, so I thought I would change it to Dual Channel mode... so I did.

It completes the Windows XP loading screen, then reboots... constantly, until I change it back to Single Channel mode.

Is there something wrong with my RAM? or is it the motherboard? or my PSU not giving the mobo enough power? I dont have every power cable plugged in, I have a 20 pin ATX power in the 24 pin plug, and the 4 pin ATX power plug and a 4 pin molex cable plugged into the motherboard. Could this not be giving it enough power?
Many thanks, system spec =

AMD Athlon 64 4000+
DFI Lanparty UT nF4 Ultra-D
2 x 512mb Crucial Ballistix PC3200 DDR400
Connect 3D X1800XT 256Mb
2 HDD's etc.
Antec TrueBlue 480W PSU.

A:System reboots constantly, when I change my RAM from Single Channel to Dual Channel

Check your mobo manual, to see in which slots you need to put memory sticks to make it work in Dual Channel mode.
AFAIK you need 1 each of the same size/type in slots 1 and 3 (yellow) for DC.

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Hey everyone

I got a bit of a problem here, and I'm at a loss on what to do to fix it.

Some background about the situation would be a good place to start. A few days ago I came home from work and found my PC in a "lights are on, but no one's home" state. The power button was lit up and the fans were in motion, but the monitors were in power saver mode, not the normal on state with the blank screen saver. I tried moving the mouse, mashing on the keyboard but nothing happened. So I reset the machine and it just went to a blank screen, no beeps, or messages, just the same ole lights on no ones home deal again.

Now before this I had been having memory problems, with blue screens saying "memory management" and "IRQL not less than or equal". So I thought it might be a bad strip of ram, and even bought two more strips to replace the ones I had removed. In the process of testing each strip I discovered that one was bad. (That was not the fix by the way)

After putting in the new ram in for a total of 8GB's of ram (figured if I'm gonna buy new ram might as well increase the total amount) it booted up and no more blue screens after loading into windows, YaY it was fixed or so I thought. A few weeks later the above incident occurred and the only way to get the PC to boot up was to pull two strips of the ram and insert the remaining strips into slots 1 and 3 for a single channel configuration. Didn't matter which set of ram I used, ju... Read more

A:Dual Channel Suddenly Stopped Working, Only Single Channel Remains

Britton, go to the asus site for your motherboard. Download and install the latest drivers. Download a copy of your manual and review the bios settings. If need be manually input the correct timings for your ram. Also make sure to follow the ram installation documentation for which slots to use to enable dual channel.

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