Apple is offering a Radeon HD 4870 (512M) as a Configure To Order (CTO) option on the Nehalem Mac Pro. We at Bare Feats Labs have tested the Radeon HD 4870x2 (2GB) under Vista Ultimate (Boot Camp) on the Nehalem Mac Pro and are so impressed with its performance, that we would like to see ATI offer it as a Retail Upgrade. If you agree, please sign our petition and we'll share the results with ATI.