Ive been having some problems with getting dual channel to work on this motherboard. Ive read about issues with the second yellow slot on this motherboard, but i cant even get dual channel running in the black slots. Then i read something about the mem possibly not getting enough voltage? Im using Corsair XMS2 DDR2 800 2x1gb (c4 version) and i think theyre supposed to run on a higher voltage than the default one, but im not sure. I havent touched hardware in a few years so im a bit out of it lol >.>;; Oh and by the dual channel not working, i mean sometimes it wont even get past the welcome screen in vista or it crashes soon after. If i run it in the yellow slots, i can get into windows, but i usually crash in a few minutes. Memtest also gives me errors up the ass continuously when i have the memory setup in the yellow slots. With the black slots, i get to the lil round windows icon before the welcome screen but then it just freezes there. Right now im running single channel with the memory in slots A1 and B1 (yellow1 and black1) and i get no errors at all in memtest after 300% coverage.