How will this perform?

I ordered a new build and its a pretty big upgrade coming from a compaq presario. Sorry if this is the wrong section. I just would like to know what sorts of fps in crossfire i will be getting?
The specs are:

Intel core i5 750 lynfield(CPU)
MSI hawk GTX 460 1gb(GPU)
ASUS P7P55D-E PRO(MoBo)
8gb Corsair 1333 9-9-9-24(RAM)\
Western Digital 1tb(hard drive)
ASUS 23 inch monitor with max resolution of 1900x1080.

Thats pretty much the main stuff. Sorry if this the wrong section again.

Thanks!

Comments