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I have a VS512MB400C3 Lot#0344085 memory chip that is failing Memtest86+. I have an identical chip that was purchased at the same time that tests fine. I need an RMA to get the defective chip replaced.


Tested on:


Asus P4P800-VM

P4 2.4G 800FSB

Auto voltage

Auto DRAM Frequency

Configure DRAM timing by SPD

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


Advanced/Jumper Free

AI over clocking: Manual

CPU Freq: 200

DRAM Clock: 400 MHz

Memory or Dim Reference voltage: 2.75 Volts

System performance: Auto

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: 3

SDRAM RAS to CAS Delay (tRCD): 4

SDRAM Row Precharge (tRP): 4

SDRAM Active to Precharge Delay (tRAS): 8

SDRAM Burst Length: 8

Memory Acceleration Mode: Auto

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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I have the latest bios (rev 1013 - 09/08/04) Tested the chips individually with your settings and got the same results. One chip is good, one is bad.


Also, I installed into a different system with the same results.

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