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P6T Deluxe V2 cannot detects only 8GB not 12GB

post #1 of 5
Thread Starter 
I had this build since 2010, so yesterday I decided to move from my HAF 932 to a HAF 912. I also reseated my H50. Booting up, Bios shows only 8GB of ram wherein before the 12GB works properly. Thinking the ram wasn't sitted properly I reinstalled it again but same result.

I also arranged the sticks properly like A1 B1 A2 B2 A3 B3, the problem was the DIMM A2-B2 "looks" to be dead since it doesn't detect the ram. Using the suggestions like reseating the cpu, looking for grounds, changing voltages etc, All results the same still 8GB

The funny thing is CPU-Z detects 12GB, Lavalys detects 8GB but sees all the rams on all dimms (see screens below) Im just thinkin if my DIMM A2-B2 is dead then it shouldn't detect the rams right? I usually dont post problems unless a simple search can give me an answer but this one got me pulling my hair already. Any suggestions mates?

BTW memtest detects 8GB but shows all dimms have ram inserted on the slot.

lava2.jpg

Lava1.jpg

CPU-Z.jpg
Edited by mark3510 - 3/26/12 at 8:18am

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post #2 of 5
Read your motherboard manual thoroughly about approved RAM and rules with RAM. Some of these newer chipsets have had weird quirks regarding RAM. Of the people on OCN i've helped with RAM problems, 25% of the time the answer was in their motherboard manual.

You could try memtest 86+ as well.

Sorry, other than that, out of ideas. Wish i could be of more help.
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post #3 of 5
Six DIMMs often need special consideration to get functioning correctly:

-Make sure the CPU is seated correctly and that there are no bent LGA socket pins.

-Use the right uncore speed for your CPU and the memory speed you are attempting (at least double the DDR rating of the memory, on that Bloomfield).

-Try giving QPI/VTT voltage a bump.

-Increase the tRFC timing by about 25-50%. Default tRFCs are almost always too tight for two DIMMs per channel.

-Try adding a 1-2 cycle delay to RTL on all channels.

-You may also want to loosen tRRD and tFAW slightly.
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post #4 of 5
Thread Starter 
Funny thing is it work properly before and had it like that for almost a year. I guess I'll just have to play with bios settings for a while if that doesn't work then Ill try changing my CPU cooler. Im sure there's no bent pins. I double checked them before reseating the H50. Thanks guys
post #5 of 5
Thread Starter 
Update: Still 8GB until countless tests and retries. I guess the DIMMS gone bad tho I cant really understand why other softwares detect that theres a ram on A2 B2 slot, jeez mad.gif
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