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Bad Module

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I seem to have a bad module. I have 2 CMX256A-3200C2 modules. One works

fine. The other does not-errors,program crashes. P4 2.4A-133 Auto Detect , Memory=Auto Detect. Substituting other memory sticks corrects the problem. I would like to return the defective stick for warranty service.

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  • Corsair Employees
Can you tell me the make and model of MB you have along with the CPU speed and it’s FSB as well? In addition, please tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set?
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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 TwinX512-3200C2


CPU Freq: 133

DRAM Clock: 166MHz

CPU/Dram ratio: 4:5

Memory or Dim Reference voltage: 2.75 Volts

System performance: Standard

AGP Voltage: Default *unless you have ATI 9200 or 9600 then 1.6 Volts suggested!*


Configure Dram timing by SPD: Disabled/User define

SDRAM CAS Latency: 2T (2.5T AMD Platform)

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Row Precharge (tRP): 3T

SDRAM Active to Precharge Delay (tRAS): 6T

SDRAM Burst Length: 8

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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This is not a matched set.

One v1.1

One v1.2


Set bios, ran memtest.


Module 1

Passed memtest.

Fails to load windows, or loads and crashes. Norton antivirus crashes immediately. When running md5sum, gets different answer every time. But never the correct one.

Tried Windows Memory Diagnostic test.

Fails MATS+ test at address 0fffb02c on some passes.


Module 2

Passed memtest.

Loads windows. Norton works. Seems stable. Does md5sum, gets correct anwer.

Passed Windows Memory Diagnostic test.

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