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Problem with CMX1024-3200 Module


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I have two CMX1024-3200 modules running in dual-channel mode on an ASUS p4C800-E - bios version 1019, default settings. WinXP is unstable (os spontaneously reboots, bluescreens or apps crash/don't start).


If I switch to using just one module, XP is unstable with one but not the other. Also MemTest86+ (http://www.memtest.org) reports lots of errors with the module that's not running stable, but no errors with the other module.


Also, for reference, I've installed two CMX512-3200 modules from another system on my board in dual-channel mode - no problems with WinXP, no problems reported by MemTest86+.


Here's all the data off the suspect module (as it's printed on the reflective label):


CMX1024-3200 XMS3200v3.1


XMS3200 1024MB 400MHz 3338


The second matching chip which tests out fine in single-channel mode is same as above, except the number in the middle row is 0425033-0.


Both modules purchased on 4/25/04 from ZipZoomfly.com. I've been referred to you buy them as they only replace parts for 30days from date of purchase.


Let me know if I'm missing some special settings or if you need me to run additional tests.


Thank you.

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  • Corsair Employees

Please make sure that you have the latest BIOS for your MB and load Setup/optimized default settings, and try the following BIOS settings;

TwinX1024 or TwinX512-3200

Advanced/Jumper Free

AI over clocking: Manual

CPU Freq: 200

DRAM Clock: 400 MHz

Memory or Dim Reference voltage: 2.75 Volts

System performance: Standard

AGP Voltage: Default *unless you have ATI (9200 or 9600) or NVIDIA (5200 or 5700) then 1.6 Volts suggested!*


Configure Dram timing by SPD: Disabled/User define

SDRAM CAS Latency: 3T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 8T

SDRAM Burst Length: 8

Performance Acceleration Mode: Auto or Enabled

USB Legacy Support: Disabled

All other settings should be set to default settings!

Then please test them one at a time with http://www.memtest.org and let’s make sure it's not some other issue! I would run the test for at least 2-3 passes to be sure!

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Just tried your suggested configuration with the latest bios for my board (the version I quoted earler is the latest) - same results unfortunately. I start seeing errors about 10 seconds into the process (test2) and they pile up pretty quickly. My other Corsair modules test out ok with your settings.


This is the only one of four Corsair modules I have that memtest finds problems with using your suggested motherboard settings and also the default motherboard settings. It's also the only one that causes problems in real world usage: apps/OS crashing.


Any other useful things I can try or should I send it in?



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