My cousin has a gigabyte EP35c-DS3R board with 6 gigs of ram, an intel pentium E2160 1.8 GHz cpu, an AMD radeon hd 6870 1gb card. He needs an upgrade if he wants to play his games on the highest settings (Rust, Fallout, etc.) He needs another 2 gb stick of RAM and a better processor. I was wondering what would be the a good replacement. Preferably a quad core.