Graphics card question

[ingsoc84]

Hello.if you look at my specs below, will installing a gtx 580 with 3 gigs of ram give me a noticable improvement in performance/fps on high/original settings? Thanks in advance

p.s. I've also pushed my cpu up to 3.6....I know its way slower than the intels out there running at 4.2, I just dont know if those that can play the game very well can do so because of much higher cpu speeds, or vram memory. thanks.