InsideHW.com has reviewed Sapphire and PowerColor ATI Radeon HD 4730
graphics cards.

Position in which Radeon HD 4770 found itself, at one moment, has been little bit unpleasant. Lack of available GPUs combined with huge demand can be nightmare situation for any GPU manufacturer. Reason for this situation is newly adopted and implemented 40nm manufacturing process that wasn't reliable enough at that moment. Situation got improved after price drops of some HD 4850 and HD 4830 models. As another way for further improvements in this situation new Radeon HD 4730 was presented.

ATI Radeon HD 4730 CrossFire Review