Like the topic title says, just wondering what frames you would have in crysis 2 full maxed out.

I suggest you look for reviews that use Crysis 2 to benchmark that have been written already. For instance, like this one: http://www.tomshardware.com/reviews/radeon-hd-7970-benchmark-tahiti-gcn,3104-8.html

It doesn't use a i7 920, but it shows you the difference in some specific Radeon and Geforce cards in the same test bed.