Last week, we were already expecting the new Radeon HD 3870 to be best GPU for Apple-branded Pro application as AMD/ATI drivers are usually better optimized than those for NVidia cards. Rob Art from Barefeats confirmed our expectations by testing different cards.
The Radeon HD 3870 is 21 to 41% faster than a GeForce 8800 GT, bringing an important graphic acceleration for all Motion-based application including iMovie. Interestingly, it seems that this card obtain high performance level in the Mac Pro rev2 than in the rev1. In summary, if you are mostly a gamer, then you will pick the GeForce 8800 GT, but if you mostly rely on Pro applications from Apple then you best choice will be the Radeon 3870 HD. If you already own a GeForce 8800 GT, then you can try to overclock it to reduce the performance gap with the Radeon HD
