OWC is listing a Radeon HD 3870 with a monster heatsink/fan assembly that's being billed as "Apple OEM": http://eshop.macsales.com/item/ATI Technologies/630ATI3870/ It's clocked just like the Retail "Mac and PC Edition" (i've confirmed this). The price is nice at $189.99 and the fan is reportedly whisper quiet. Caveats: 1. It only works in 'late 2008' Mac Pros. 2. There is no CrossFire connector. I'm dubbing it the "Silver Arrow" as an homage to the 1939 Auto Union Type D which recently was put up for auction by Christies then removed due to some question about its pedigree.