Hey guys so i am getting a used dell vostro for free and i have 8 gb of ram a gtx 760 2 gb Vram and a 520 watt psu to upgrade, and the cpu is intel i3 dual core i think or quad and it is 3.30 ghz, so they say you should get a i5 but if it has 3.30 ghz do i need to upgrade? Im also replacing thermal paste with artic 5. and help would be apreciated. also im gonna run rainbow six siege.