I intend to install one (1) ATI Radeon X1600 Pro 512 MB PCI Express in my personal computer, but I'm not sure of the exact specs of the product. I'm currently using Pentium 4 and my PC has a 250-watt power supply. Just need to know if the product ATI Radeon X1600 Pro 512 MB PCI Express requires a minumum power supply for the installation. Thanks.