Hey
I just bought Crysis 3 and played through maybe half of the campaign, but I can't run it on Ultra High graphics with my PC; so I decided to look for a new graphics card.
I'm not an expert at that, so I need some help with picking out a card

Right now I got Sapphire Radeon HD6870 1GB GDDR5 PCI-E, which is Okay, ran Crysis 2 on High with 50-70 FPS. BF3 on High with 40-70 FPS. But Crysis on medium with 30-50FPS, sometimes 60-70FPS.

I was thinking about this card XFX Radeon HD 7850 2GB GDDR5, but I'm not sure.
Any suggestions?