My Computer Configuration:- Motherboard-Mercury 945GCM Processor-Core 2 Duo 2.40GHz RAM-2GB DDR2 Power Supply-450W Graphic Card- PowerColor ATI Raedon HD5450 1GB DDR3 My computer usually runs normally without the Graphic card in the PCI slot.. But when I put graphic card that is PowerColor ATI Raedon HD5450 in the PCI slot the computer won't boot up.. Please Help me what to do..!! If you want any more information about something then let me know.. Moreover on the following thread http://www.techpowerup.com/forums/showthread.php?p=2650456#post2650456 anush3070 have the same problem and he had got it fixed but had not explained HOW!! So please who so ever is trying to help me, just keep in mind that write as simple as you can!! Thanks in Advance..