I've had this PC for just under a year now, It's one of Dell's G5 series. It's worked great up until last week. The display would suddenly switch to a lower resolution and 30mhz instead of 60. After rebooting, it loads with the dell symbol but shows pixels. I'm fairly certain it's not my monitor(TV) because it works fine for anything else, also wondering how it could be the GPU as.. I just popped in a brand new one, and had the same issue but with green pixels instead of blue. Any help would be greatly appreciated.