Memory query

  Al94 14:36 27 Aug 05
Locked

Need a bit of advice on memory. Wife's PC was playing up, random crashes in XP, memory increased recently. Emachine, originally 128mb ram, increased initially by adding 256mb - total 384mb and it ran fine. After she tried some video editing, I bought an additional 512mb from PCW(yes should have used Crucial but it was on offer at same price)and replaced the original 128mb to give total 768mb. Initially seemed OK and faster then the crashes started. Taking the new module out and replacing with original made everything OK again. Now the query - the PC takes PCI 2100 DDR 266 CL2.5 memory which is what the original and 256mb module are. The packaging of the new 512mb module from PCW says the same but under Everest shows up as PC 2700. I downloaded memtest today and when I ran it on the PC running on the 512mb module alone, It showed literally thousands of errors whereas running the test on the combined 128 and 256 modules is completely clear. What I don't understand is whether these errors are showing up because it is PC 2700 rather than PC 2100 as packaged or is it simply a faulty module and both types should run together OK. Like to know before I head to PCW.

  dan11 15:27 27 Aug 05

Do you know the model number of the e-machine. it can be then check on crucial, to see if 2700 is compatable.

It should run with the pc2100 memory that fact that you are getting errors point to a faulty dimm.

I would take it back to PCW and explain that you have done an extensive MEM test and it is coming back with loads of errors.

  Al94 15:34 27 Aug 05

The exact model number 220 doesn't show on Crucial, my understanding is that 2700 should run on a machine designed for 2100 but will run at the lower speed so therefore it would appear to be simply faulty unless anyone thinks differently?

  Cybermaxx 15:35 27 Aug 05

When you run Everest, what CL ratings does it show for the new 512MB module?

I recently replaced one of my two PC2700 256MB modules with a 512MB PC3200 module (and they're from different companies), and I have had no problems at all with the set-up (I asked for advice on a few boards before going ahead with the upgrade, and there were a few naysayers who reckoned it would cause crashes etc.).

Under Everest I get this for the 256MB PC2700 module:-

@ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)
@ 166 MHz 2.0-3-3-7 (CL-RCD-RP-RAS)

and this for the 512MB PC3200 module:-

@ 200 MHz 3.0-3-3-8 (CL-RCD-RP-RAS)
@ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)

which means they can run at the same speed and with the same latency.

  dan11 15:55 27 Aug 05

From what I can see of the e-machine 220, on google. Some say pc2100, while some say pc3200.click here
click here

  Al94 16:04 27 Aug 05

Thanks - useful links. I think it must just be faulty so will take it back tomorrow - heading to a BBQ now!!

  Al94 16:22 29 Aug 05

Have to say was impressed with local PCW in Bangor, NI. Took the module back (lost receipt) no problem, they swapped it for another one and said if I had any further trouble to bring it back and they would swap it for a different make. Installed the new module, ran a memory test, all 100% clear this time and all is fine. Nice to deal with these guys.

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