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WMD Test Failure


BADMEM

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My Problem: Memory errors on the WMD test & Random Crashes.

 

Q: Is one of my memory chips bad or mismatched?

Q: Why isn't the SPD info on my chips (2.0-2-3-6) the same as the Corsair specs (2-3-2-6)?

Q: Is there something wrong with my BIOS settings?

 

My system:

Corsair Platinum Twinx DDR

2 x CMX512-3200LLPT XMS3205v1.2 512MB 400MHz 2326, 040313-1

Intel Desktop Board D875PBZ,

BIOS is up-to-date and set to defaults, System is not overclocked

see http://www.intel.com/design/motherbd/bz/

Intel P4 3.20GHz / Gforce FX 8900

 

BIOS SETTINGS:

BIOS VERSION BZ87510A.86A.0123.P33

Processor Speed 3.2

System Bus: 800 MHz

System memory Speed: 400 Mhz

L2 Cache RAM: 1MB

Total Memory: 1024MB

Memory Mode: Dual Channel

 

BIOS MEM SETTINGS

CPC Override: auto

SDRAM Frequency: 400 Mhz

SDRAM tCL: 2.0

SDRAM tRCD: 3

SDRAM tRP: 2

SDRAM tRASmin: 6

Memory Refresh Cycle Time: 12 Clocks

Memory R/W delay: 2 Clocks

Memory R/W timing: 6 clocks

DDR Voltage: 2.625 Volts

Total memory: 1024 MB

Memory Mode: Dual Channel

Memory Channel A

Slot 0: Not Installed

Slot 1: 512 MB (DDR400) SPD: 2.0-2-3-6

Memory Channel B

Slot 0: Not Installed

Slot 1: 512 MB (DDR400) SPD: 2.0-2-3-6

SPD defined as: [tCL]-[tRcd]-[tRP]-[tRASmin]

 

With the above configuration, I ran Windows Memory Test and got quite a batch of errors. WMT could not identify the errors by memory module. The errors occured both with the Cache on and off.

 

I switched the 2 chips to the 0 slots, but got same errors as above.

 

Ran WMT with one stick (Call it MEM-A) in Channel A, Slot 0 and got NO ERRORS. Then tested other chip (CALL it MEM-B) in same place and got NO Errors.

 

Then tested MEM-A in Channel B, Slot 1, and got No Errors.

 

So, it seems the errors are related to the DDR mode -- which is the whole point of this memory.

 

Also, when I set the BIOS setting to match the chips SPD, the system would not POST.

 

So, what is going on here and what do I need to do to get my system to run with both memory sticks inserted in DDR mode?

 

Thanks for your help.

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Q: Is one of my memory chips bad or mismatched?

Q: Why isn't the SPD info on my chips (2.0-2-3-6) the same as the Corsair specs (2-3-2-6)?

Q: Is there something wrong with my BIOS settings?SDRAM Frequency: 400 Mhz

SDRAM tCL: 2.0

SDRAM tRCD: 3

SDRAM tRP: 2

SDRAM tRAS: 6

 

DDR Voltage: 2.625 Volts

 

Those are the correct timings that you have set. They are tested @ 2.75 volts, so you should up the voltage to 2.7x or 2.8 volts. They're warrantied up to, but not over, 2.9 volts, so no worries there.

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Please try and set the Dim Voltage to 2.775 Volts and test the modules with http://www.memtest.org one at a time.

 

Moving this thread to General Questions, as this is not a Customer Care Issue!

 

 

OK, Done. Left BIOS settings the same as above, except I did change the DIM Voltage to 2.775 (which is the max for my board).

 

Ran Memtest on each module seperately. One came back with a bunch of errors on the first pass. The other one tested for 3 passes with no errors.

 

Can we at this point assume that the module that produced the errors is bad and can I get a replacement from Corsair?

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  • Corsair Employees

Yes lets get your modules replaced, and No I am sorry that is not a Customer Care issue.

Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it!

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