I5 3570k and 3570

The i5-3570 has a locked multiplier, the i5-3570k has an unlocked one, it's useful if you want to overclock the cpu.
Also yes, the i5-3570 has a different on die gpu, the intel hd 2500, the other one the intel hd 4000.
 
the k has an unlocked multiplier and the non-k has vt-d

as mentioned already they have different gpus as well.

even with a dedicated video card you might consider having the better igpu. quicksync on the hd4000 is considerably faster than on the hd2500 and quicksync is pretty badass at transcoding.
 
i was thinking about i5 3570 + sapphire hd 7870 oc or amd fx 6300 + msi hd 7950 oc twin frozr and i cant decide..my friend tell's me that amd suck other tell that amd is good i dont know what to think anymore :S
 
the second system is more balanced, the first system is a bit processor heavy and lighter in the gpu department. you would see more fps with the 2nd system i would imagine but the first system would still leave you room to upgrade the gpu down the line for even more fps when you need it.

just my 2 cents.
 
I'd get the i5-3470 and the 7950 or 7870 XT.
There's no performance difference between the two i5, usually the i5-3470 is cheaper.
If you can't afford a 7950, get the 7870 XT, which is basically a 7950.
 
i dont think it is better, i think it is more balanced.

personally i side with getting a k processor for a few dollars more and squeezing every bit of performance out of it i can. then i upgrade the gpu every 2-3 years.

thats just me though.
 
Both i5 are good ones, the i5-3570k is only worth it, if you want to overclock the cpu.
Any of those will not bottleneck the cards, by the contrary, i'd get a better gpu for the i5.
Like the 7870 xt or 7950, like i said.