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Mixing PC100 with PC133 SDRAM for XPS R400 Dell

Q: Mixing PC100 with PC133 SDRAM for XPS R400 Dell

I have a Dell XPS R400 with 196 Mb (32/32/128) of PC100 SDRAM running windows xp. I wanted to upgrade memory. Dell claims the machine can handle ~380 Mb of PC100 SDRAM. I checked around on-line, and it appeared that I could install PC133 SDRAM on this machine. My machine does not boot after I installed a single stick of 128 Mb PC133 SDRAM. It will boot with the original PC100 SDRAM. Any ideas?

This discussion indicates that my machine can handle more memory: http://www.techspot.com/vb/all/wind...XPS-R400-with-Intel-SE440BX2-motherboard.html How can I verify this?


Preferred Solution: Mixing PC100 with PC133 SDRAM for XPS R400 Dell

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A: Mixing PC100 with PC133 SDRAM for XPS R400 Dell

maybe the bored doenst like pc 133 ram

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Hi. I recently installed a 128MB PC133 SDRAM unit on my motherboard. Now my Windows98 system only uses that 128MB and ignores my 64MB PC100 card. If I swap the two cards positions, then I get the 64MB w/o the 128. When I go into CMOS, I find that the only two RAM speed settings are 10ns and 12ns. Changing from one to the other has no effect on the either/or SDRAM problem. How can I get the full 192MB SDRAM useable all at once? Thanks in advance for your advice.


A:{SOLVED} PC133 - PC100 SDRAM compatibility

Same problem occurs if you tried to mix 100 mhz with 66 mhz Ram. Only the one in the first slot will work. The only way to get around it, at that time, was to make sure you bought 100/66 mhz ram. I'm afraid you are going to have to buy your memory to conform to the existing memory, or junk the existing, and buy all new memory.

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So let me start again First post here. I'm a programmer who doesn't meddle with pc parts. Well now has come the time!

I used the tool that Crucial provide on their website, which claims that my pc contains 2 pc133 slots and 1 pc100 slot (sdram).

It says I have max. capacity of 512mb. Will 2 256 pc133 sticks be ok? Or will performance default to pc100?

Also, what're the types of ram and will any other work with my pc? TIA.

A:My pc contains 3 memory slots: 1 SDRAM, PC133; 2 SDRAM, PC100 slots.....

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I am upgrading a Demension 4300 w/ a 1.4gig P4 actual speed is 1395.
Crucial says it uses PC133 which it now has. BIOS says the bus speed is 100mz.
IF i put in PC100 will it work at 100 or 133 or not at all?

A:PC133 or PC100 RAM?

Hi jlrka,
if you put ram of mixed speeds in the same machine, say 100 and 133. it will all run at the speed of the slowest module (100Mhz) in this case. unless the compatibility of the motherboard has other caveats. check the manufacturers ram support list for that.

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I just pulled 2 sticks from my friend's computer. 1 is pc133 and the other one has no label. He doesnt know what he has.

How can you tell or test if it's pc100 or pc133 ?

A:pc100 or pc133 ?

Put the doubtfull stick in on its own. download EVEREST HOME edition(used to be AIDA and if you have it that will do) and it will tell you the real speed.

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Working with a motherboard with an Intel chipset... older school, the Whitney i810

Checking the specs it takes 100 and 166 SDRAM but not 133... it's the next series of motherboard chipsets that take 133 SDRAM as well

Currently running with 133 SDRAM though, and perfectly fine it seems... is it simply an issue that 133 SDRAM wasn't available at the time the motherboard was initially released?

Should I experience any problems or comeback using 133 SDRAM in the system?

A:PC100/166 RAM... But Not PC133

You probably won't experience any problems at all. The new memory will run at 100 since that is what your mb supports, but it is capable of 133. That's all.

You might look for a BIOS update to see if it addresses the 133 MHz issue. But the subjective difference between 100 and 133 is so small, it hardly warrants the risk of flashing the BIOS, especially on an older machine without all the BIOS safety built in to the new ones.

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I have a laptop which calls for PC100 SDRAM. Can I use PC133? What does the 100 &133 mean anyway?

A:PC100 vs PC133 RAM

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Hi all, question I was running 128mb RAM pc133 on my computer, I thought that my memory went bad because of everything went very slow on me and i woule get memory errors, i swaped my ram with another stick of 128mb but it was pc100 , same problem, it turns out it was a minor virus and i cleared it up, i didnt want to go through the hassel of opening up the case so i left the pc100 ram in there, but now i get blue screens when using kazaa or winMX, this never happened with the pc133 ram i uninstalled the programsn and re-installed same thing, i wonder if it is because the pc100 is slower? by the way i am running win2k pent 4 1.5 , so i am thinking of getting more ram, my mBoard handles DDR do you think this may solve the problem, could the downgrade from pc 133 to pc 100 cause this blue sreen issue that never happend in the past with kazaa and winmx? if im gonna open the case again it will be to add better ram , your suggestions would be of great value , thank you guys,,, =)

A:PC100 ,PC133, or DDR?

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I have a 400mhz amd k62 computer running on 100 mhz bus speeds. it says that it needs pc100 in the manual, but can i pop pc133 in there instead? If so, will I have to clock down the bus speed? Any help would be appreciated. Also, just wondering which type of ram is best out of the two?

A:pc133 ram vs. pc100

I run 700mhz, K7. Get a second on this but I believe you can interchange them with no problems. I would go with the PC133 SDRAM.

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Can you tell me please what is an easy way to identify memory?

A:Is it PC133 or PC100?

Unfortunately there is no easy way unless you have a memory tester. The next easiest way besides taking the chance of installing it in a computer would be to obtain the data sheet or specs from the manufacturer.

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HI, I have one module of sdram and I was wondering if anyone could tell me if it is pc100 or pc133. The chips have Infineon printed on them as well these numbers and letters hyb39s128800ct-7.5 It is double sided with a total of 16 chips . I don't have a spare computer to install them into and use a progam to detect their properties , I'll have to rely on your help.

Thanks alot!

A:Is this pc100 or pc133?

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hi I'm working on a friends computer. It's a k6-2 with an Apollo via MVP3 mobo. This computer only only has 64 meg pc100. I have a pc133 128meg ram chip. Is it ok to put this in even though it's pc133 ? I remember someone telling me a long time ago that pc133 will work on in a pc100 board.. Is trhis true? Would I have to go into cmos to tell it what kind of ram it is or would that be done automaticlly? Thanks again

A:pc133 ok instead of pc100?

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I've just purchased two 256mb sdram PC133's from my local shop. I took in a PC100 ram for reference.

I put one of the sticks in my computer, which already had a 128 stick in (PC100) and the 256 started to smoke. I quickly took it out and luckily my computer is still working!

I put the other in my mates computer and it wouldn't run thru the usual start up sequence. Her old RAM was broken so she didn't have anything in the computer at all.

My question is, did the shop sell me the wrong type of ram - should I have bought PC100's or would the PC133's work? If they will work, why did mine smoke and her's not run at all?

Thanks in advance,


A:PC100 or PC133 RAM

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i have a laptop that as far as i understood was compatible with pc100 ram. ive alot of people saying to get pc133. are these two backwards compatible with each other or are they just smoking crack? my laptop is a toshiba tecra 8100 with 256mb of pc100 currently and a 800mhz processor. thanks.

A:pc100 or pc133

PC133 RAM is backward compatible with PC100. In other words it will run at 100Mhz speed. However, PC100 will not run at 133Mhz. I suggest that you go to Crucial.com and look up your laptop to see what it will support before buying any.

Good luck.


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I am wondering if my type of RAM might be causing me problems. I have the following installed:

Slot 1:
Memory Module Properties
Module Name Infineon HYS64V16302GU-7.5
Serial Number 0112C527h
Module Size 128 MB (1 rows, 4 banks)
Module Type Unbuffered
Memory Type SDRAM
Memory Speed PC133 (133 MHz)
Module Width 64 bit
Module Voltage LVTTL
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh
Highest CAS Latency 3.0 (7.5 ns @ 133 MHz)
2nd Highest CAS Latency 2.0 (10.0 ns @ 100 MHz)

Slot 2:
Memory Module Properties
Serial Number None
Module Size 256 MB (2 rows, 4 banks)
Module Type Unbuffered
Memory Type SDRAM
Memory Speed PC100 (100 MHz)
Module Width 64 bit
Module Voltage LVTTL
Error Detection Method None
Refresh Rate Normal (15.625 us), Self-Refresh
Highest CAS Latency 3.0 (10.0 ns @ 100 MHz)
2nd Highest CAS Latency 2.0 (13.0 ns @ 76 MHz)

Slot 3:

Memory Module Properties
Module Name Smart Modular 323029-001
Serial Number 4333E801h
Module Size 32 MB (1 rows, 4 banks)
Module Type Unbuffered
Memory Type SDRAM
Memory Speed PC100 (100 MHz)
Module Width 64 bit
Module Voltage LVTTL
Error Detection Method None
Refresh Rate Normal (15.625 us), Self-Refresh
Highest CAS Latency 3.0 (10.0 ns @ 100 MHz)

A:PC100 & PC133 - Compatible?

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I was wondering if I can upgrade my RAM speed to PC100 to PC133 or even better DDR or PC3500. would these work in my computer.

A:can I upgrade from PC100 to PC133 or DDR

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i own a dell optiplex gx1 pc with a p2 400 mhz processor and 128 mb of ram with three chips of 64, 32 and 32 (168 sdram). these are pc 100. i have just ordered two 128 mb pc 133 rams. Can anyone please tell me if it is possible to combine the 64 mb pc100 ram with the two 128 mb pc133 ram?Thanks.

A:combining PC100 with PC133 RAM


I won't expect that to work as the buss speed is to slow for the 133 to sync to.
sorry :blackeye:

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i have a compaq AMD-K6 running around 466MHz. i want to add some RAM but don't know which type to use between PC66, PC100 or PC133.


A:PC66, PC100 or PC133

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I recently purchased some memory for a friends computer from newegg.com His computer is a HP Pavilion 8750C it takes PC100 Non-Ecc SDRAM. I bought PC133 Non-Ecc SDRAM made by Rosewill. I put the chips in for him and it will not start-up and i cant figure out why. I then put the chips in my second PC that runs PC133 and they wont work in it either? Is this a memory chip problem or is it the wrong kind of memory somehow? I read you can put PC133 in a PC100 computer but it will only run at PC100 instead of the 133. Any help will be greatly appreciated!!! Thanks,

A:PC133 in a PC100 MOBO??

Get Memtest86 from http://www.memtest.org/
Read the instructions to make a floppy, then run it with different configurations.
Rosewill is a crap brand, return it for something reputable (Kingston/Crucial etc.)

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I have a friend with a compaq I think like a P-500
I was fixing it for him because he had a blank screen when
he installed some ram
I noticed some of the ram chips were PC100 and a couple were pc300, and a couple I could not tell
I put 128/100 with a 64/100 and it works fine.
But one of the 128/100 chips does not work at all....
Can you mix and match them like that and would it cause a problem?

A:What is the difference in PC100 and PC133 ram?

pc 100 is memory that is rated to run at 100mhz
pc 133 is memory that is rated to run at 133mhz

No idea what pc300 is

some you can mix and match, some you can't, depends on the motherboard and what it supports for memory. The faster memory should just run fine at the slower clock speed but some motherboards won't recognize the faster memory.

I don't suggest mix and matching on amd processor's

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I have used Belarc to check my motherboard, processor etc.
It said my FSB was 133 Mhz
It also said my Dimm currently fitted was 100Mhz Sdramm (2 x 128)

So..i think mistakingly i thought it would be ok to buy a 256md sdram PC133....however, the system only sees it as 123 giving me a total of approx 383.

IS this obviois or is there a setting i should alter OR have i bought the wrong type and need PC100

Any help much appreciated


A:Pc100 / Pc133 Memory Conflict ??

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I have talked to guys who own computer stored and he said that because my computer is older ( about three years) and is already running one sisded PC 100 RAM it will not work with PC 133 RAM. will PC 133 RAM work in my computer as long as it is one sided?

will it make my system crash?

A:Will PC133 RAM work in a comuter that uses PC100?

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I've seen some PC100 memory sticks for sale in my local paper. The problem is that my motherboard has a bus speed of 133Mhz. Is it worth me buying the chips and trying them out?

A:Can PC100 memory work on a PC133 Motherboard?

Right up front they will run slower and if you have pc133 Ram in there now it will slow them to 100 mhz. If they are cheap enough why not give it a try. You could probably take them back.

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I put a stick in...(256) and macine only counts it as 128...what gives. I was told PC133...would work in PC100 boards. Was I lied to?

A:Is PC133 Memory backwards compatible to PC100 slot? {SOLVED}

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Hi. Can someone tell me if either of theses two pictures from the Pc Wizzard program shows the actuall combined mhz that these 3 sticks of ram are running at. All the sticks are supposed to be pc100 but one of them could be pc66. Is this system running with all pc100 chips ? Thanks

A:Are these all pc100 sdram ?

That's the wrong section for memory---you're in the FSB section. If you scroll down further in the first window, it will show the individual "banks" and what frequency each chip is capable of. They will run at the frequency of the lowest chip.

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Hi to all
I have a HP Vectra VE8 333 desktop slot 1 F.I.C.440bx mother board version1.x with 66 mhz bus clock with 64mb PC100 sd ram

A friend has given me 2x 128 and 1x64 mb sticks of PC 133 SDRAM AND THEY WORK!, It goes heaps faster

Could someone please explain the pros and cons and WHY?

Thanks in anticipation.


A:pc133 sdram

No real cons, most pc133 is backward compatable with the pc100 standards. I have seen it not work on a couple of boards. Bottom line, if it is working, enjoy!


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Hi, I was just wondering if a stick of PC100 SDRAM would work in a K7S5A motherboard? I'm about to build a new system with this motherboard and just wondering if that RAM would be alright to use.

Thanks Daniel

A:K7S5A and PC100 SDRAM

Yes but you would be better off with PC133 SDRAM or 2100DDR if you can get it. Obviously, you can't mix them

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I am lookin to upgrade my ram , im running pc 100 sdram , i have 192 mb 64 x 3 . im wanting to run xp instead of win98 i need two 128 mb but its as hard as rocking horse poos to find, could i use pc 133 , instead of pc 100 ? thankyou kimsland , i know im terrible .

A:Help upgrading pc100 sdram

It's in the book

Read you Motherboard Manual for details on installing ram.
Older ram IS hard to find.
Look for Flea Markets.

Post your Specs.


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i'm planning on purchasing a new system from dell but am not sure if i should get one with sdram or rdram, which is better any why?

A:how better if at all is rambus ram vs sdram pc133???

All you Rambus buffs dump your stock. Intel announced that the
i815 with PC133 RAM gave RAMBUS and Intel's own i820 chipset a
whoopin'. Here's a little snip:

"In nine of 11 standard industry benchmarks the 815E/PC133 synchronous DRAM implementation
beat out the 820/Rambus configuration for desktop PCs. The two chip sets and different memory
formats were about equal in three of those tests, according to results on Intel's Web site."

So much for Rambus being king the proverbial hill when it comes to memory BW. I
encourage you to read the press release and decide for yourself but I for one wouldn't
rush out to buy the i820/RDRAM combo after what I read.
http://www.pcdemon.com/July/70900.htm#PC133 v RAMBUS SMACKDOWN

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a while ago i built my first computer from the ground up, so my knoweldge was somewhat lacking on certain issues such as compadibility. i got a Asus A7A266 mobo and kingston ram.. little did i know that kingston ram and asus are moral foes, and it plagued my compuer with problems. now the time has come to replace the faulty ram, but my mobo can support both pc133 and ddr ram. Im using my computer for 3d animation, im in college for that, so speed and render time is a factor. nothing huge tho, just 30 second shorts and such. i hit pricewatch and the prices for a gig of pc133 ram is close to 512 mb of ddr ram. what should i get? pc133 or ddr ram? thanks!


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Looking for two PC100 256MB 168-Pin SDRAM PC 100 Unbuffered sticks of RAM for an old Toshiba V3100 desktop.

Please PM me if you have it.

A:WTB Two PC100 256MB 168-Pin SDRAM PC 100 Unbuffered

Never mind. Bought some from NewEgg.

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yes or no ?? will this have a bad effect on the computer ?/ any info is appreciated

A:Is it bad to use PC100 memory on a PC133 memory slot ??

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I'm trying to install XP on XPS R400, previously running 98. I'm getting error message invalid system disc but all original discs are lost. I reformatted drive thinking the XP would go right on but I'm stuck.

A:Dell XPS R400 Pentium II

It sounds like it's not booting to the Windows XP CD. You need to get into the BIOS setup and be sure the boot sequence is set to CDRom Drive, Floppy Drive and then hard drive in that order.

When the PC first powers on, you should see instructions to press a key to get into Setup. It's usually the DEL or F1 key. Once in the BIOS setup set the Boot Sequence and be sure to read the instructions on the screen to save the settings as you exit.

Let us know what happens.

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not sure where to post this since this is my first time on board. I have a Dell Dimenstion XPS R400 running XP. My son was using this computer last week and now it displays a "Enter Password" box in the middle. You shut the computer off, it starts up again, normally, but then won't take you past the page where it lists the BIOS info, etc. I have tried F8 or ESC but it won't go anywhere unless the password is entered. I am not thinking it is the XP but am thinking it is a Dell password that is needed. I won't even download from the disk and reload XP.

Any suggestions on a password or on what to do? thank you in advance! mellow

A:Help w/password for a Dell Dimension XPS R400...running XP...

given the "system disabled 65535" code, also...

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I have a Dell XPS R400 with a Pentium II, 400 MHz processor running Windows 2000. (It originally had Windows 98). I currently have one socket filled with 128 MB of SDRAM (PC100, unbuffered, CL=2) . I would like to upgrade and add more memory.

Information from Dell says the computer supports 100 Mhz SDRAM 168 pin DIMM with a maximum size of 128 MB up to a total of 384 MB (3 sockets).

The motherboard is an Intel SE440BX-2. The documentation for it says it supports up to a 256 MB DIMM SDRAM for a total of 768 MB.

Why the discrepancy? Is it based on the OS? And how high can I go?

A:Memory Upgrade - Dell XPS R400 with Intel SE440BX-2 motherboard

The old W98 did not function properly with 256MB or over.
W2000 does not need more than 512MB, but works fine with up to 1GB.

Intel said:

System Memory Combinations
The motherboard has three, dual in-line memory module (DIMM) sockets. Minimum memory size is 16 MB; maximum memory size is 768 MB. The largest DIMM supported at this time is 256 MB using unbuffered 128 Mbit technology parts. The BIOS automatically detects memory type, size, and speed.Click to expand...

I would believe Intel rather than Dell.
Make sure you get PC100/CL2 SDRam, anything else does not work.
You can mix different MB-sizes memory-chips. So buy what you can afford.
Unless you do intensive graphics, even just 1 256MB-stick will do wonders.

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Dell XPS710 did clean install of Windows 7 x64 from XP. All went well and things worked fine for a while. Decided I wanted to get more out of my x64 machine so decided to upgrade the RAM from 4x1GB to the system max 4x2GB. I originally ordered the wrong RAM (PC2-6400 800Mhz) and when I installed them the system wouldn't even turn on.

Picked up the correct PC2-5300 667Mhz 4x2GB units and after a clean install I put 2x2GB SDRAMs in with 2x1GB original SDRAMS. Machine shows 6.0 GB installed and lists them as 667Mhz and Dual Asymmetric. Everything works fine.

If I installed 4x2GB SDRAMs, the system says 8GB installed but lists them as 800MHz and Dual INTERLEAVED? Won't make it thru startup. Will try to do a repair but nothing works. Go back to 6 or 4 GB and things are fine?

Any ideas?

TIA - Stretch

A:Dell XPS SDRAM Issues

You probably weren't using the 4GB RAM you had to being with. So adding to make it 8GB is a fairly pointless exercise and will not give any noticeable benefit to the machine.

Adjust your bios settings for memory Vdimm (voltage) and timings. Check the Ram maker's page about your specific modules and adjust accordingly for all Ram settings.

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Just ordered a new Dell XPS 8910 to replace my old W7 XPS 9000.
The old PC came with  with 8GB Dual Channel DDR3 SDRAM  @1066MHz  (4 DIMMS  2GB's each)
Can I use these old 4 modules on the 8910's mobo to increase its memory from the 8GB memory it comes with to 16GB total memory??
Thanks for your help

A:Can DDR3 SDRAM Memory be used in new Dell 8910?

idreos,Unfortunately, you cannot use the memory in the xps 8910.Memory-xps9000Type 1066 / 1333 MHz, DDR3 SDRAM Memory connectors Six Memory capacities 2 GB or 4 GB Minimum memory 2 GB Maximum memory 4 GB (32-bit Operating System) Memory: Max Memory: 24GB (64 bit OS)Memory-xps8910Slots Four DIMM slots Type UDIMMDDR4Speed 2133 MHz Configurations supported 8 GB, 12 GB, 16 GB, 24 GB, 32 and 64 GB

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i have this dell cpt 333GT; it has one 128MB 100MHz module and i have another 128MB 66Mhz module too. Is it possible to mix both type of frecuencies in this models? i can put them both in there but suddenly it throws the blue screen of death saying that ther "might be a problem with ram maybe a speed mismatch etc etc etc" and its hex code. Can this two types of frecuencies 100 and 66 can be mixed in this models?

thanks in advance.

A:Mixing memory speeds on Dell CPt 333GT works?

read the upgrading ram guide in the guides forum.

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As the topic title suggests, my question:

Is DDR II SDRAM worth the price increase over DDR SDRAM?

The price difference isn't that drastic, but is the peformance increase that large, and is there any other issues with DDR II SDRAM which i should know about having never built a machine with DDR II in it. I've built countless machines with DDR but have no experience in the newer technology.

Many thanks

A:Is DDR II SDRAM worth the price increase over DDR SDRAM?

DDR and DDR2 are NOT compatible, they have different physical shapes as well.

DDR2 is overpriced and does not give THAT much of an increase.
Stick with some good DDR.

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I?m looking into a cheap mobo and came across the ECS K7S5A Pro

This mobo has 4 DIMM slots, 2 for SDRAM, 2 for DDR SDRAM. I currently have in my older PC SDRAM, but 3 sticks. I was wondering if it was possible to use SDRAM and DDR SDRAM at the same time with this mobo?

Personally, I don?t think so. But I?ve only really been reading about this stuff for a week or so. Hehe.


A:Possibility of running SDRAM and DDR SDRAM at the same time?

I don't think that that is possible at all. I seem to remember reading an article at www.tomshardware.com that suggested that it was not possible at all.

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Hi Experts!!    I was thinking about what if I upgrade or maybe add another RAM into my Laptop... can I put a samsung 2gb 10600s 1.5v into my laptop??

View Solution.

A:Can I combine a DDR3 SDRAM with a DDR3L SDRAM

1.35 volt memory will run also at 1.5 volts but not vice versa. If your current memory is 1.35 volt you need 1.35 volt memory not 1.5 so the answer is no. 

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I know there have been alot of questions concerning RAM lately. I have one more.

Below is an Everest output of my memory modules.

When I open the case, I can only see two slots which look to be filled with the ram.

But in the E report, "Module Size" - 256MB (1 rank, 4 banks) - what is that referring to?

How much RAM can I actually upgrade to? Does this Everest report give me this information?

Am I locked into the 200mhz?

I know you guys are probably getting a little tired answering the same questions
over, I know I appreciate it when you take the time to explain the simple things.

[ DIMM1: Mosel V826632K24SCTG-D3 ]

Memory Module Properties:
Module Name Mosel V826632K24SCTG-D3
Serial Number 8FD22664h
Manufacture Date Week 8 / 2005
Module Size 256 MB (1 rank, 4 banks)
Module Type Unbuffered
Memory Type DDR SDRAM
Memory Speed PC3200 (200 MHz)
Module Width 64 bit
Module Voltage SSTL 2.5
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh

Memory Timings:
@ 200 MHz 3.0-3-3-8 (CL-RCD-RP-RAS)
@ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)
@ 133 MHz 2.0-2-2-6 (CL-RCD-RP-RAS)

Memory Module Features:
Early RAS# Precharge Not Supported
Auto-Precharge Not Supported
Precharge All Not Supported
Write1/Read Burst Not Supported
Buffered Address/Control Inputs Not Supported
Registered Address/Control Inputs Not Supported
On-Card PLL (Clock) Not Supported
Buffered DQMB Inputs Not Supported
Registered DQMB Inputs Not Supported
Differential Clock Input Supported
R... Read more

A:Solved: Dell 3000/DDR SDRAM PC3200/200mhz 512Mb Upgrade?

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I Use ASUS Mother board which i use 128 and now want to add 256 indepently both are working but when i add its showing only 256 where i need to changes and wahts problem ? both are 133Mhz.

please reply

A:Install of additional 256 SDRAM for 128 SDRAM

I assume that if you put either module in the board it will work OK on its own. Have you tried swapping the modules over in the slots, sometimes it helps if the larger module is in the first slot.

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I have a PII AB-SM5 - MoBo

When I upgrade the memory, from edo, to 128mb sdram, the MoBo recognize it as 32MB, there's nothing wrong with the chip.

?1. Is there something I can change in CMOS
?2. Can I upgrade the MoBo, if so, where?

[This message has been edited by alexenjen (edited 02-23-2001).]

A:Motherboard: 128 sdram showing as 32 sdram

There is nothing in CMOS.

The ABIT SM5 is an older board. I would be the problem is the chip you are using. Is it PC100 or PC133? The board will probably only work with PC66 or slower.

"That is not dead
Which can eternal lie
Yet with strange aeons
Even death may die"
- H.P. Lovecraft

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quick question

I have a laptop which has the following RAM installed (supports up to 1GB RAM):

>> Memory Information
Type : DDR-SDRAM PC2500
Frequency : 154 MHz
ECC Diagnostic : No
CAS Latency (tCL) : 2.5 clocks
RAS to CAS (tRCD) : 3 clocks
RAS Precharge (tRP) : 3 clocks
Cycle Time (tRAS) : 6 clocks
Bank Cycle Time (tRC) : 10 clocks
Shared Memory (video) : Yes
> Physical Memory : 512 MB

>> General Information
DRAM Slot 0 (Banks 0/1 ) : 256 MB - DIMM
DRAM Slot 1 (Banks 2/3 ) : 256 MB - DIMMClick to expand...
is it possible to replace those with the following RAMs ?

>> Memory Information
Type : DDR2-SDRAM PC2-4300
Frequency : 266 MHz
DRAM/FSB Ratio : 2/1
Supported Channels : Dual (128-bit)
Activated Channels : Dual
ECC Diagnostic : No
CAS Latency (tCL) : 4 clocks
RAS to CAS (tRCD) : 4 clocks
RAS Precharge (tRP) : 4 clocks
Cycle Time (tRAS) : 11 clocks
Bank Cycle Time (tRC) : 16 clocks
Shared Memory (video) : Yes

> Physical Memory : 1024 MB DDR2-SDRAM

>> General Information
M1 (Bank 0 ) : 512 MB - SODIMM
M2 (Bank 1 ) : 512 MB - SODIMM
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I heard DDR2 is not compatible with DDR. what is the risk if I try to use DDR2 on a laptop that uses DDR ?

A:is DDR2-SDRAM compatible with DDR-SDRAM ?

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I am looking into buying a Dell system. At the moment they are offering a free 1 gig upgrade (from 512). The default 512 is dual channel but the free upgrade (of 1 gig) is not. Is there a difference here? If the 512 is duel channel is it the same as having 1 gig of single channel?


A:512MB Dual Channel DDR SDRAM at 400MHz (2x256M) vs 1024MB DDR SDRAM at 400MHz

I'm not 100% sure about this, and you should look at the manufacturers web site to double check. But, I think that the dual RAM can be used on a system that has a bus of 800MHz, whereas the 1GB module of RAM will only run on a bus of 400MHz.

So, to decide what chip to get look at your motherboards bus speed and see if it is an 800MHz bus or a 400MHz bus.

If it is an 800MHz bus then take the 512MB RAM module.

If your mainboards bus is 400MHz then you might as well have the 1GB module of RAM.


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