Ok, so I just got my new radeon HD4870, and after I installed it an error started to pop up evey time I turned on my computer. The error reads - Error loading C:/WINDOWS/system32/usaqxjtv.dll The specified module coul not be found. And when I play games, at around the 30 minute mark, my monitor says entering power save mode and then goes blank and won't come back on unless I reboot the computer. (while the monitor is blank the game is still running cause i can hear it just not see it) I deleted my old nvidia drivers before i installed my 4870, and i'm pretty sure I installed the 48700 correctly. I have no idea how to fix this problem and if anyone could help me out it would be much appreciated.