Firstly i just bought my new Club 3D 7870 and a 700w psu and i can play crysis 3 medium-High and LoL and very high while remaining a solid 60 fps with a frame lock on aha and i know if i had a better cpu i could get ultra on crysis but here are my specs:
Intel Pentium e800 Dual core 775
Asus p5g41t-m lx2
Club 3d 7870 RoyalKing
And i am obviously upgrading my cpu soon but for the minute i bought a gpu and i had lots of people on here saying you will get really bad bottlekneck your cpu cant handle a 7770 etc and i went ahead and bought it anyways and thank god i did it has improved my gaming experience alot
So here to the point people who are new to computer building etc do what you think is right and what you can afford at the time... i am not saying dont ask for help just take peoples suggestions with a pinch of salt meaning dont just do what a few people tell you to do.
The GPU isn't everything in gaming. While it's important, a lot of things like AI and ray-casting are CPU-based. Shadows are as well, I believe. So on Ultra graphics the higher-resolution shadows and things of that nature could be what's causing the bottlenecks.
lol, yeah, play skyrim. you will be dropping down to 20 fps in some areas. And honestly, I dont actually believe you that crysis 3 runs very high settings at 60fps, people arent even getting that with a much better cpu than you and with better graphics cards.