Ryu, you need to fire Crysis up again if you think it's not CPU limited. The game's engine is a mess and some areas wreak absolute havoc on anything which isn't on . That, plus destroying a few huts will drop your fps hard, no matter the area. The price of great physics
You can run the game on the updated Warhead engine, but that's like putting a band-aid on a gaping hole. Still worth doing though.
Man, the 2500K was sick.
Can even run it passively at 4.9GHz, which is just... disgusting to say the least.