1.My computer spec: dell optiplex 390 with core i3-2100, 6gb drr3 ram, 1td hdd, asus engt440 with 1gb ddr3, 265w psu. When i play world of tanks on medium spec, i'm get very low fps, around 30-35. Is it because of my psu? Maybe gpu is not getting enough power. 2. Can my pc handle nvidia gtx560 ti? I'll buy powerful psu if my pc can handle it. Pls help me.