I recently got a new computer. intel q9550 quad 2.88ghz, dual ATI 4870 , asus p5e3 deluxe wifi mobo, 4gb ddr3 ram, 1200 watt PSU...when i first received it the video wouldn't display so i figured the video cards were messed up so i replace the 4870 CF with new ones...still no luck...same problem...no video..so i changed the mobo..still the same problem..the problem is i get no display on my monitor and the computer doesnt even boot...i installed 4 more case fans which spins when i turn the computer on..all the fans work but the computer doesnt boot ..theres no beeps from the mobo..nothing..no display...since i changed the GPUS and the mobo and still doesnt work im starting to think it is the PSU??? anyone have any advice sugguestions to help me figure this out? ive had this comp for 3 weeks now with no luck....HELP.