I have 3 asus 27" 3d monitors, i had 1 680 and everything worked fine, had the 3 monitors working 3d on 120 MHZ life was good, till i got into BO2 and i found the frame rates really suffered. I got another 680 and everything seems to be working, but can't play in 3d because its set to 60 mhz. in the nvidia control panel the 120 mhz option is not even there just 60... when i change the resolution setting in windows only 2 monitors work the 3rd says "out of range". all monitors are connected via DVI cables, the cables are fine i tested them and switched them around. i have 2 cables in the first card and 1 in the second. i thought it was a faulty card, i switched the cards around in the slots (major pain in the butt since the rig is water cooled) same thing, windows can change the setting in the first card only no matter which one it is. removed drivers, clean install, restarted crossed fingers, prayed and even did the monkey dance for good luck charms, even rolled back couple updates... no luck.
MB: Asus Maximus V Formula
CPU: i7 3770K @ 4.5
Ram: 1866 8 gb Gskill RipjawsX
GPUs: gigabyte GTX 680 OC 2 gb, MSI GTX 680 OC 2gb both at same speed 1124 mhz
OS:windows 7 Ultimate
drivers: Nvidia 320.49
any help would be greatly appreciated thanks a ton in advance...