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P4P800-E Deluxe & 1024 Twinx PC3200XL PT


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Hi all,


I had bought a 1024 Twinx PC3200XL PT (2*512) for my Asus P4P800-E Deluxe (with latest bios : the beta one) and it seems to have a problem with this pair. Let's explain the deal ...


I had made some search throught this forum and didn't find any answer to my problem. I had set my BIOS setting to the following :


DRAM Clock: 201 MHz ( because in Memtest it show 199Mhz when configured at 200 in bios. strange ...)

SDRAM CAS Latency: 2T

SDRAM RAS to CAS Delay (tRCD): 2T

SDRAM Row Precharge (tRP): 2T

SDRAM Active to Precharge Delay (tRAS): 5T

SDRAM Bank Interleave: 4 Bank


Fixed the DDR voltage @ 2.85 (Also tried @ 2.75 ...)


In memtest, with the pair, it show me errors at test 5 saying ... I also tried to invert the two modules, it give the same result.


But testing the each module separately with the same configuration, giving me no error at all ...


Dear RAMGUY, do you have a trick in your hat for me ???


Thanks in advance.


The Sorceor

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I had put the modules in the two others slots, not the blue ones but the black ones. At this time, first pass is OK, lets wait and see other passes to check long time stability ...


Althought, it's very strange because in the MB manual they said it's better to put the twin modules in the blue slots for dual channel activation. Dont really know at this time if the dual channel is enabled or not. In memtest i've the CAS : 2-2-2-5 / Dual channel (128 bits) indication. Does it confirm the activation ?


Thanks, and stay tuned for the others passes (at this time : Pass 0 test 7 --> no errors :cool: )


The Sorceor

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Oops, bad news ...


Second pass give 8 errors at test 5













This is the same errors i had when the modules were in the blue memory slots ...


Any other idea ?


The Sorceor

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Yes of course :biggrin:


The problem is that the modules running well @ 2-2-2-5 alone, but when they are plugged together in the dedicated memory slots, it's impossible to have a stable system. It make blue screens and other system crashes ...


The only way to make it work together is to set it @ 2-3-2-5. This is a twinx set that normally must run at 2-2-2-5 and it's especialy paired for ... I had tried a lot of combination of frequencies, and voltages (2.75 to 2.85) and nothing want to work.


Previously i had a Twinx PC3200LL and i worked fine without any crash. Is it possible that the Twinx pair is not designed to work together or they are "misynchronised".


Best regards.


The Sorceor

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Did you load setup defaults when you changed modules and then set the settings? If not please try that. Load setup defaults with the modules in slots 1-3 and set the memory Voltage to 2.75 Volts and Disable legacy USB and set the timings manually to Cass 2-2-2-5 and run http://www.memtest.org But make sure you do not set any of the performance options!
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Nop, unfortunately, I have tried your method, then nothing better. I also tried to flash my BIOS to the Stable version 1009.003 instead of the 1010.001 who is the Beta version.


Then, at this time, the only way to make it work together is to set it at 2-3-2-5 / 2.75V.


Perhaps another clue, is that i have a Promise FastTrak S150 SX4-M (PCI S-ATA Raid controller) addon card. Do you think it can produce this kind of error ? Will i have to launch memtest without this card plugged ?




The Sorceor

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