core i7 has hyperthreading which makes the cpu emulate 4 extra cores (8 cores).
a core i7 is aimed for ppl who do lots of work encoding/ audio editing and rendering.
a core i5 is the same chip without hyperthreading.
you should be looking at second generation i-series f you are looking to build a new PC, such as the 2500K and the 2600K, thats what amd655 was talking about too. the P67/Z68 chipsets motherboards would be a good choice too but it all depends on your budget and if you are looking to build a new rig, or just upgrade your current one (or just enquiring )
[EDIT]: amd655, only saw your last post after i posted mine, but yeah.
@ ambam you dont make any sense.
you asked us what is better x58 or p55.
yet we said p67/z68 is better.
then to top it off you go and say its only a bit better in performance.
please do correct me if i am wrong but you are basically saying we are wrong and i know full well that you know all this stuff we are saying.
who cares about ivy bridge it aint even out yet.