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I've got a Corsair Module CMX512-3200C2PT that will not let any mainboard I plug it into POST. I am currently trying to use it in an Asus K8V Deluxe board, but the system will not POST with it plugged in. I use another exact same module and it works fine. This module used to work in my MSI K7N2 Delta board, but because of constant blue screens and crashes, I assumed it did not like both modules plugged in at the same time so I removed it. Now that I upgraded my system, the module will not POST in any board that i've tried it in.


Unfortunately, I purchased it over a year ago and the store says they won't obtain an rma for me unless its within one year.

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Did you purchase the CMX512-3200C2 modules as a pair or two separate sticks? If you purchase it as a pair, then please try the recommended setting below, but if not then please set it at 2.5/3/3/7 with a 2.8/2.85 volts instead of 2.5/3/3/6 with 2.7/2.75 volts. Please put the memory module on slot 1 & 3; make sure that you have the latest BIOS for your MB, and set the following settings on your BIOS;

TwinX512 or TwinX1024-3200C2

Advanced Chipset:

Memclock Mode: Limit

Memclock Value: 2:1 (DDR400)

Bank Interleaving: 4/Enabled

Burst Length: 4

SDRAM CAS Latency: 2.5T

SDRAM RAS to CAS Delay (tRCD): 3T

SDRAM Active to Precharge Delay (tRAS): 6T

SDRAM Row Precharge (tRP): 3T

Hypertransport: 4X

Jumper Free/Frequency Voltage Control:

Spread Spectrum: Enabled

CPU FSB Clock: 200

DDR Voltage: 2.7/2.75 Volts

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

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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Unfortunately, I can't test the bad module since it won't POST no matter what slot I put it into. I am using the latest bios for the mainboard. The 2 modules were purchased seperately and not as a pair.


I can change the settings in the bios with the good memory module as you suggested, but as soon as I install the bad one, the system will no longer POST. I have tried removing everything from the mainboard including the ATI 9600 video card and using an old PCI video card and same problem.


With the good memory module installed, I can boot to Knoppix and run memtest86 with no problems. I have tried this with the good memory in all 3 slots, each time and no failures came up. Can't test the bad module since it will not let me boot up at all.


I knew this module was failing when it started crashing my old MSI K7n2 board with blue screen memory errors. Upon removing it the system would run somewhat smoothly. I assumed the mainboard was going bad or just unstable so I left the bad module off for good. I then upgraded recently to the Asus K8V Deluxe board and used the good module and had no problems installing WinXP Home SP2. But as soon as I installed the 2nd module it would not POST.

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