I have a abit NF7-S v2. and 2 sticks of Corsair XMS 256M 3200 CL2, running\nat dual mode, 11X 200 MHz fine. Then I decided to add another 512 M same\nmemory to make it 1 G. In the beginning it was fine. CPUZ shows they were\nrunning at dual mode at timing 2.5, 3, 3, 8. And 3-4 days later the\nMicrosoft Flight Simulator started to crash several minutes into the flight.\nWhen I check the memory I found they were running at 3, 3,3 8 now. When I\nstart the Prime 95 torture test it failed right away. Saying a rounding\nproblem. I ran memTest 86 all pass. Now I have to lower the FSB to 180 for\nflight simulator not to crash and prime 95 not to throw error message . I\nran the prime 95 torture test for 20 minutes on all three memory chips\nindividually and they all seemed fine without error. It seems that when\nthree of them are together they won't work at 200 MHz. but they were all\nrated 3200. I tried to raise the Vdimm all the way up to 2.9 (Utility\nreported 2.99 v) with no luck. Any body have any clue as what is going on.