Hey! I recently purchased a new video card hoping to make my current computer run games a little more smoothly until I buy a new one. I ended up buying a pre oc'ed Leadtek A6600 GT TDH, and I also bought a new power supply (a Raidmax 450yx120 450W) to provide enough wattage for it to run. So I installed the new PSU with few problems, but after installing the video card, my computer refuses to start up. When I attempt to turn the computer on, sony screen loads and then the monitor basically goes black. I've tried all sorts of things to get this video card working: I've tried replugged everything, I've messed with settings in the bios, I've tried disabling the integrated video card (through windows... I coulden't figure it out in the bios) on my computer, reformating my computer and nothing has worked so far. Anyone have any ideas about how to fix this thing? Some Specs: I'm currently running Windows XP Home Edition on a Sony Vaio PCV-RX850. 2.4 gigahertz Intel Pentium 4 My motherboard is a ASUSTeK Computer INC. P4S533VX REV 1.xx (no idea what this means. I just saw in another post that people asked for it). I know the motherboard supports AGP x8 chips and I have ample power. What's going on here?