Hey i haven't been on for awhile, but i have been working in my system for most of the summer. I started with a amd790GX chipset board which had integrated graphics and i was trying to run 2 3870 x2's on this board, with my amd phenom II 940 X4 BE. I later found out i couldn't do that and ended u getting an older MSI board Its a 790X no integrated so quad CFX worked but i am getting weird results. In single card with everything stock clocked i get 16,000-16,500 in 3dmark06, on AMD 9.12, 10.12, 11.3, 11.6, and 11.7 drivers, when i add the second card i get form 16,500-17,000 in 3dmark06, i would figure i would see at least 3 to 4,000 point difference maybe get into the 20's once i overclock my 940 again, but this seems messed up, I have the GPus running on 2 450 watt PSU boosters (5.25 bay PSU's made for video cards) one for each card, and the system is powered by a 400 watt PSU, the boosters have 44 amps on the 12 volt rails, i should have plenty of power here and i am just thinking somethings off, OS is windows 7 64 bit, 5gb of ddr2 @ 667. Any suggestions?