I installed Xeon Phi 5110P, Quadro K600, and Geforce 7600GS on X9DRG-QF, but NV cards can only run in 256 color (8bit) 800x640 mode in Windows 7; CentOS 6.1 works ok. What is the problem?
The problem is on Windows built-in VGA drivers. Please update Nvidia driver v311.35 to fix the problem.