If i play anything intensive, meaning over 700W my UPS kicks in and starts beeping at me. The only thing i upgraded was my mobo, cpu and ram. I used to have an i7 920 clocked at 3.6ghz with 6gigs of ram. Video cards are the same. I never had this problem before this upgrade. The ups is a cyber power 1000PFCLCD. I can play these games however but only till the UPS runs out of power. EDIT: Did the psu calculator thing and the old system would have used 763W and the new one only 730W.