hi cibic
i tried memtest86+ few times but it always froze during the 50% of the first loop. i checked the temperatures and they were below 60. (i watercool the northbridge,cpu and RAM) i could not check the RAM temperature because of the water block. it is a Koolance block so i don't think the Ram are overheating. If you think i have a problem with the RAM i am thinking of buying OCZ3N1800SR4GK . they are 150$ in Amazon and they are SLI Ready. do you think they would work stable on this board?