HD 5770 to GTX 560 (Non Ti)?

How big of a difference will I see in game performance (Mostly Battlefield 3) when changing my graphics card from HD 5770 to GTX 560 (non ti) with my setup: AMD Athlon II 630 x4 2.8 Ghz and 4 gigs of ram?|||A minimum of 30% increase in performance according to your spec. If you compare the two cards GTX 560 will perform 40% to 50% higher than a HD 5770.|||560 of course. But that Athlon might be bottlenecking your system in future so just be prepared to buy new mobo and CPU next time when you need an upgrade.