Power supply makers are being briefed now in order to make sure that the power supplies they are shipping by the end of this year are up to par with the high end GPU requirements for late 2006/early 2007. You will see both higher wattage PSUs (1000 - 1200W) as well as secondary units specifically for graphics cards. One configuration we’ve seen is a standard PSU mounted in your case for your motherboard, CPU and drives, running alongside a secondary PSU installed in a 5.25” drive bay. The secondary PSU would then be used to power your graphics cards.