This is true and we have some hope for our 8800 GT. Please check this link out: http://www.mactechnews.de/forum/thread.html?id=238244&page=2
So I really hope that even a 8800 GT works in the old Mac Pro models. The Apple support article was also unclear: It says G5 cards do not work in Mac Pros - but perhaps Mac Pro cards are interchangeable. Perhaps Apple didn´t really test the new 8800 GT in the old Mac Pros and cannot support them for now (an leading to those telephone calls to cancel the order)
Has anyone tested it?
So I really hope that even a 8800 GT works in the old Mac Pro models. The Apple support article was also unclear: It says G5 cards do not work in Mac Pros - but perhaps Mac Pro cards are interchangeable. Perhaps Apple didn´t really test the new 8800 GT in the old Mac Pros and cannot support them for now (an leading to those telephone calls to cancel the order)
Has anyone tested it?
