Long time reader fist time poster. Just recently bought another gigabyte ati 5850 too crossfire on my P55-UD3R motherboard. As soon as i plugged it in and enabled crossfire my performance in Crysis has dropped considerbly. I would normally average around 55 - 60 fps on high. @ 1050. Now its going at around 20 - 25 fps. I noticed the PCI ex has 2 physical 16x but only 1 runs at 16x speed and the other is 4x. Not sure whats going on.
Hope someone out there knows whats going on.
system specs. i7 860
1156 , Gigabyte P55-UD3R
4 gig DDR
2 x Gigabyte ATI 5850