Is my pc good enough?

wesker82

Honorable
Feb 27, 2013
20
0
10,510
hi i recently build a new pc for gaming and i want to know if its good or bad any opinion,here are the specs

i5-2500k 3.30
gtx580
intel 520 240gb ssd series
asus p8z77 v-pro
coolermaster haf-932
corsair 850w
16gb ram patriot viper

i had an i7 950 with msix58 pro-e and 6gb ram ocz and i change them for that,it was a good move?my perfomance was 6.9 and now is 7.6.what you guys think?also i am considering to overclocking my cpu is it possible with stock cooler and with my motherboard?thanks