A LOT of FPS. Probably 120+ FPS Max on vanilla minecraft. You could also use the shader mod on huge minecraft servers at 60+ FPS.
What I'd recommend doing is cutting down the ram from 16 to 8, because you'll never actually need 16, probably even 8.
I would also try to get an SSD with an HDD, as you'll see a HUGE performance boost opening applications and loading things (Including OS).