Apple releases ATI Radeon HD 2600 XT Firmware Update
Monday, March 10, 2008 - 06:09 PM EST Apple today released the ATI Radeon HD 2600 XT Firmware Update for Mac Pro computers with one or more ATI Radeon HD 2600 XT graphics cards installed, running Mac OS X 10.5.2 or later with the Leopard Graphics Update.It updates the ATI Radeon HD 2600 XT graphics card firmware on all of the ATI Radeon HD 2600 XT graphics cards in the Mac Pro to improve system stability.
ATI Radeon HD 2600 XT Firmware Update is available via Software Update and also as a standalone installer.
More info and download link (792KB) here.


Where's the NVIDIA GeForce 8800 GT update?
Mine is running a bit wonky...and I have seen data on MacFixIt that suggests it's running slower on the Mac than the base card.
:-(