I currently have a HP a1600n desktop. These are the specs: HP Pavilion a1600n Media Center (AMD Athlon 64 X2 2GHz, 1GB RAM, 200GB HDD) Specs. Desktops Specifications. I would like to add a graphics card...specs: XFX GeForce 8600 GT XXX Video Card - FREE Company of Heroes PC Game, 256MB DDR3, SLI Ready, PCI Express, (Dual Link) Dual DVI, HDTV, Video Card PVT84JUDD3 in Canada at TigerDirect.ca Will I need to change to upgrade the power supply? If I need to, by how much? :freak: :freak: