okay so bought a brand new asus gtx 550 ti a bit cheaper model cuz 192bit memory but i keep getting temperatures up to 75 while playing any 3d game o.0? i did a hole in the bottom whit a pipe so the air from the gpu would flow directly out from the pc helped abit was 80c before but still need more cooling any opinions got some silver thermal should i try add it? and is 75c bad if u play 2hrs straight also the fan has a terribly sound at that temperature