Ive been looking into this lately as well. There are plenty of good benchmarking sites around. This is probably the best for your setup:http://www.techpowerup.com/reviews/ATI/HD_4890_CrossFire/1.htmlThis is the most complete and thorough review I have seen for them.But in a nutsehll, you are looking at well over 60fps (at 1080p) for all games except cryostasis, stalker clear sky and crysis.Typical crysis bench is 40 fps average depending on your processor. Basically, its top ofthe range, nothing to worry about!