Originally Posted by Mons7rouS
and gaming performance ? it mainly to do with the graphics card
( e.g. if you have a 560ti and upgrade to a 680, you will see a major differnce in FPS )
Not entirely true, I have a single GTX560ti, and used to have amd phenom II x6-based system (was testing at both 2,8 and 3,5ghz) and upgraded to i5 2500k.
On some games I noticed a huge difference (crysis 1 and GTA IV) and on some others I got a decent boost (BF3 MP, stalker: COP). However, games like crysis 2,metro2033,bad company2,far cry2 play exctatly same on both systems, but conclusion is, i5 2500k is much better in gaming than phenom II x6, even when using a single mid-range GPU.