Oh yea you are right, it doesnt support an i5, well then its alright then, but if you can in the future, do an upgrade, a new mobo and an i5, then its perfect but that also means reinstalling windows. gta 5 umm i really dont know maybe a minimum of low 40s, you cant really says, depends on the graphic settings, but im damn sure its playable withough any lag at all. anyway good luck, and yea if theres anything else just text me through private text