Which processor will be better in gaming and media?

My 2 core i5 650 with a H57 chipset motherboard or a 4 core i7 920 with a X58 chipset a friend is offering me for trade

i play games like GTA 5, G-mod, Fallout new vegas and minecraft the i5 has done amazing so far i can play GTA 5 on max settings with 54-60 fps but i wouldn't mind a upgrade

Added (1). my GPU is a Asus GTX 560Ti Gaming 1gb
Ram= 8gb 1600
600 watt moulder supply

Well the i7 certainly looks better

The i7 will be better since you play newer games that can utilize multiple cores. The i5 is better for older games that only use one core. Both are more then enough for the current games though.

Well, the bare minimum for running modern games is having at least 4 cores. The i5 one is not a gaming CPU; its a bottleneck for GTX 560Ti.