It may be technically possible for buyers of the new Mac Pro to replace their graphics cards, according to a report from the French site Mac4Ever. [Google Translate] The site claims the GPU on the Mac Pro is placed on an independent daughter card with a proprietary connection, which would make sense as it would make warranty-repairs of broken GPUs significantly easier. There is no indication if or when third-party graphics cards could be released for the new Mac Pro, but the new device is scheduled for release in December of this year.