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TWIN2X2048-6400C4 and MSI 975X PUE


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Ramguy, could it be that this is happening because i'm not able to change the Command Rate from the bios?


Could you guys contact MSI and ask them when will this option be included in their bios?


Also wanted to say that ram is v2.1, and that i managed to get DDR2-800 at 5-5-6-15 1.8V, SPD left at default, i only changed the ratio to 1:1.5.


Everest reports that the SPD for DDR2-800 is 5-5-5-15, why is RP at 6??


Here's a shot of the modules



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Ramguy if i understood correctly you want me to do the following:


Set the ram from 800MHz 5-5-6-12 1.8V to 800MHz 5-5-6-15 2.1V and test with memtest with USB Legacy Disabled?


Well there is no USB Legacy option, there is whoever an USB Controller option and also an USB 2.0 Controller option, should i disable them both?


I'm not sure what you meant with "from default 10 to 15", default 10?


In other words could you explain step by step in more detail what you want me to do, cuz i didn't get it :P


Thanks again!

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Whaaaaaaa after doing what i said, one module showed errors, it first started showing errors at test 8 first pass, after a while everywhere, it was module 341550 0640014-10. The other 341551 0640014-10 did ok in 4 passes, so i guess it's ok.




There is no Write to Precharge Delay option on my bios, only:

cas latency Auto (defaults to 5)

dram ras# to cas# delay (auto defaults to 5)

dram ras# precharge (auto defaults to 6)

precharge dealy (tRAS) (auto defaults to 12, it really says dealy instead of delay)

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Thank you very much ramguy, let's see if i can get this solved as fast as possible since i really need my PC.


Thanks for everything, and wish me luck :).


Oh, is it normal for ram to show errors on memtest but be stable in windows and everything else (even though not at it's rated speed)?

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It is stable but not at it's rated speed, as you know it won't boot with 4-4-4-12 DDR800 however it's stable at DDR2 800 5-5-6-12.


As i said before my PSU is a Topower 420W with 28Amps on the +12V rail.

Also as i said there is no legacy USB option, but i did disable USB Controller (which in turn disabled every USB option on the same page).

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  • Corsair Employees
I would see if a friend can help you test the modules in another system and or test your system with another PSU if you can barrow one. But I have no problem replacing your modules if you want to try that. Please use the RMA request found in TSXpress or follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! And please note that you are from the forum!
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Ram guy i have a question about RMA.


What am i supposed to do exactly, remember i am from Argentina.

I got the shipping label, i should go to the nearest shipping company, and buy a box, then stick the label on the box, add the postage, and send it to you guys?

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