New GPU

[Dominator33]

My motherboard is a P5KPL 1600 by ASUS, will a GTX 460 fit? And is there a big differene between a ''192'' bit and a ''256'' bit card? And is there a big difference between 768 and 1024mb ram? My last one was 512 mb. There is a a price difference of 30-40 euro's between the 768mb+192 bit and the 1024+256bit versions.

And thanks alot Hitman