Hello friends

i've got a Pc with those Specs, Msi ms-7693, Evga Gtx 670 2Gb, AMD phenom II x4 955 3.2Ghz, 8Gb Ram, 500 W power supply, Windows 7 Home premium
is There a way please to upgrade this Pc for more Performance. In other words i need an advice to upgrade something, and if it is cheap it would be better

Thank You!!!

I didn't find the right solution from the Internet.
References
http://www.techadvisor.co.uk/forum/helproom-1/what-do-i-need-upgrade-my-pc-4647600/
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