HI, I just replaced my Core 2 Quad Q8220 with a Xeon E5450 in my Intel DG41WV motherboard. I reset my bios using a jumper on the mobo and I had a black screen for about 5 minutes before it eventually booted. I went into computer properties and it said I still had a Q8200, where CPU-Z said I had the Xeon but was only running at 2.4ghz. I ran battlefield 4 and I had less performance than my Core 2 Quad so I rebooted the PC and now it won't boot at all. Any help will be much appreciated.