I just built a new rig with an Asus P5ND2-SLI mobo and Pentium D 805. 2 gigs of g.skill DDR2-800, ATI X1900XTX, and an Antec NeoHE 550 PSU. When i installed everything in my case and tried to boot I got no video and the system shut off after a few seconds. I tried a few times with no avail. Then, I took everything out of the case and set it up on a work bench and tried again. This time, I still get no video but it stays on until I turn it off. The board doesn't beep at me but I'm not sure if I have to connect it to an external speaker to hear the beeps. Anyway, I get no video from either DVI port on the X1900XTX. I'm thinking its the mobo. If I boot the system without the video card I get the same results: obviously no video but also no beeps. Help.