I recently upgraded to a 450 GTS and bought a new PSU. I have the PSU working and am on it right now. The problem is that when I place my 450 GTS into my computer and boot it up, my moniter says "Check Video Card". I am currently using my on-board graphics card to get my PC to start. I also hear the system booting and loading through my speakers but my monitor is the only problem. Been frustrated for hours.. Please help. Specs: - Computer: HP Pavilion a6042n - Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ 2.20 GHz - Ram: 2.00 GB - OS: Windows 7 (32-bit) - Power Supply: RF-500WPS2 (500W-600W Peak) Could this issue be because I need a bigger Power Supply. The graphics card I currently have requires 450W and I ran it on my other PC with the same Power Supply.