I4U NEWS published a review of the XFX GTX 280 XXX Video Card
A quote from the article:
>> XFX GTX 280 XXX Video Card Review
Today the XFX GTX 280 XXX video card is up for review. This is the factory-overclocked version of the GTX 280 we looked at a few months back. The card shares the same features in common with the factory clocked GTX 280. Support for NVIDIA PhysX, CUDA, and HDCP are standard. Of all the versions of the GTX 280 offered by XFX, the XXX has the highest clock speeds.
>> XFX GTX 280 XXX Video Card Review