OcPrices finished a review of the HIS X850 IceQ AGP Graphics cards, and compared them to both the 6800 cards from nvidia and their PCI-E counterparts.

The HIS iX850XT Turbo card is without doubt the best value X850 XT card I have seen. Thanks to the included iTurbo program, HIS can guarantee that it will run at full Platinum Edition clock speeds without issue. This was proved to be true in our benchmark suite, where we never observed any problems running it at these elevated speeds. When you consider that the X850XT Platinum Edition offers no improvement in performance or features compared to the iTurbo, it is a little more difficult to recommend.

HIS Excalibur Radeon X850 XT iTurbo and X850XT Platinum Review