Spec fit? QUICK RESPONSE PLEASE

Solution
All will work together, but why i5-2500K. Whilst it will work, the Z77 motherboard is designed, to fully utilise i5-3570K, which is a better chip, anyway, for minimal extra cost (if any).

malbluff

Honorable
There's not sufficient benefit from i5-3570K, over 2500K, normally to justify an actual "upgrade". There are no prices, on your link, but normally there's so little difference in price, that it doesn't make sense not to get the 3570K, in the first place, and it'll work better It's 10%-15% better, so does justify a small extra cost, unless that's impossible, and the 3570K supports your 1600 MHz RAM, which the 2500K doesn't, and works better with your mobo.