Currently have an HP A1730N and want to upgrade my video card to an XFX 7900GS. Current power supply is 300watts and I need bare minimum 350, so I figure a 500watt supply. I have an onboard PCI-E slot, pci slots, 2 SATA board connectors. I am running 1 SATA HD, a USB DVDRW, and have 3 sticks of 1gb DDR2 RAM. Have about 6 USB devices going. Everything else is onboard, including sound and my current video card which will obviously be disabled. CPU is an AMD Athlon 64 x2 4600+ Need something that will fit fine and give me the right connections. Looking to spend less than $60. Thanks.