I have upgraded the cpu with a Athlon x4 645 and 8gb of ram...Evga said it might not be compatible with my motherboard, since it was last updated in 2012, but i have heard from other people with 2010 systems running the 750, and there bios was last updated in 2011...I'm just wondering if anybody can confirm this...or maybe tell me the best gpu to run on this system.