Not sure if this needs to go to MB forum:
Got from NEWEGG:
Gigabyte X58A-UD3R and Gigabyte GV-N450-1GI video card
New rig with i7-950, 6GB, raid, Win7-64 ultimate
put initial setup on the bench with old VGA monitor - all was Ok for a week.
Moved PC to permanent location with dual DVI monitors, but stopped working before first reboot
freezes on "welcome" screen, no mouse, no keyboard, harddrive still crunching
Moved card from PCIEx16_1 to PCIEx8_1 slot - all works as expected
moved to PCIEx16_2 - same problem
Tried Standard VGA driver - OK
Reading other forums - thousands of people complain about the same issue with X58 and 400 series card - see posts at nVidia, guru3d etc.
tried:
- all possible drivers including 263.00 provided by gigabyte
- clean install with Windows7-64 only + chipset drivers+ nVidia
- disable videocard HD sound
- set PCIE speed to 100 or 103
- disable highprecision timer
I am sure if I RMA card or/and MB no problems will be found.
Any better ideas?