R600可不接8pin供电 但是损失超频性

superray

The Radeon HD 2900 XT will overclock to 840 MHz on the air and if you havent seen that story you can see it here. The 840 MHz core on the Radeon HD 2900 XT card is possible with the reference cooler.

Even if you don't have the 2x4 pin necessary for overclocking you will be able to overclock. The plain two 2x3 pin power connectors will do the job but the Catalyst control center won't recognise that the card has the Overdrive capability.

All you really need is the GPU Overclocking tool that we mentioned and linked here and you can overclock even with two 2x3 PCIe power connectors. So you won't be needing a new PSU.