AMD's Radeon HD 4890 has been getting plenty of press ever since its launch, but what of this board's direct rival from NVIDIA, the GeForce GTX 275? Today, we take a look at a factory overclocked board in the form of XFX's GeForce GTX 275 XXX, to see how it compares to both a reference GeForce GTX 275 as well as the Radeon HD 4890.