It looks like Mac Pro
users wanting to get in on some of the latest and greatest
action without ditching their old system altogether are still out of luck, despite a recently released "upgrade kit" from Apple that got some of their hopes up, and caused some consternation for anyone that actually took the plunge on one. As a number of users have reported on various discussion forums (one of which is linked below), the $349 GeForce 8800 GT upgrade kit only works in the newest Mac Pros, and not the older models, due to their lack of support for PCI-Express 2.0. That little detail was indicated as requirement by Apple, although many apparently assumed the cards would work because of the inherent backwards compatibility in PCIe 2.0. As you might expect, many users are none to pleased with Apple actions on the matter, with some claiming that the company's interested only in getting customers to buy a new system instead of prolonging the life of their old one. Shocking, we know.
Nvidia's Director of PR emailed us to let us know that the company is "in the middle of bringing out an upgrade kit based on the NVIDIA GeForce 8800 GT solution for all Intel-based Mac Pros." What's more, this upgrade kit "should be out in a few weeks." So there you have it, folks. We'll see if they deliver as promised.
Minor correction: it seems that Apple didn't indicate that PCIe 2.0 was a requirement from the start. That all-important detail was only added to the description on January 15th, or six days after the cards originally went on sale.