Ok. Do you want the good news or the bad news?
Brothers and sisters, we have won the battle, but we have yet to win the war.
I received and installed my 8800GT (1st Generation Mac Pro) this morning. Before I did it, I took a couple of benchmarks with the old Radeon X1900XT to see how it compared. This was more for my own information than for publishing on a site, so I only tried 1 game and 1 app. This is not an exhaustive test. If you want more in-depth coverage, go and ask one of the big hardware sites to do something about it. I also only benchmarked under Mac OS because I think the performance gains under Windows are well documented and available all over the place.
The Good News
This card is quiet. In fact using the word 'quiet' would be insulting to the 8800GT because it's practically silent. It simply doesn't make a sound. During the long flight WoW benchmarks (see below) the X1900XT sounded like a hovercraft was driving through my room. It was almost unnerving to do exactly the same flight with the NVIDIA card and not even hear a gentle hum. During normal desktop use, when I would normally have a gentle sound of rushing air in the background, now there is literally nothing at all. My Mac Pro makes the same amount of noise as my iPod Nano (i.e. none).
The Not-Too-Bad but Not-Too-Good News
There is an improvement in gaming on Mac OS X. Since we're not exactly spoilt for choice in the gaming world, I went for WoW because it's probably the one game that a fair few Mac owners play without rebooting into Windows. You can see from the benchmarks provided by WoW's own internal test, with the 8800GT installed, there was an average improvement of about 14 frames per second. While any improvement is welcome, 14fps is not good enough. There should be a significant difference between the two cards and Apple needs to address this.
The Bad News
The pro-apps situation is still bad. In Cinema4D (a 3D modeling application for those not familiar with it), you can see from the real-time rendering benchmark (the one underlined in red in the image) that the 8800GT actually drops in performance. Not by a huge amount, but any drop is inexcusable for a significantly more powerful card. We should be seeing a big jump in the score. This is simply unacceptable, and both NVIDIA and Apple should be thoroughly ashamed. Ironically, on the Mac page of the NVIDIA site they actually have a graphic proclaiming:
"Apple Mac Pro - Featuring NVIDIA GeForce 8800GT - incredible performance for intensive creative applications"
Incredible? Absolutely. I find it incredible that the 8800GT is being soundly beaten by 2-year old technology.
Conclusion
Apple and NVIDIA have got to address this, and address it quickly. This is an outstanding card at a reasonable price (for Apple), but the Mac OS drivers are clearly not up to scratch. The outlook is not all doom-and-gloom, because from the couple of benchmarks I've run, you're not losing that much performance in pro-apps, and the gaming performance is slightly better than before. Add to this the significantly reduced noise-factor, and the well-documented performance improvements under Boot Camp/Windows, and you're getting an overall better package. But... and this is a big but... THINGS COULD BE SO MUCH BETTER.
Apple... NVIDIA... are you listening? This is not the end of this story. Not by a long way.
System Specifications for benchmarks:
Mac Pro Quad 2.66 GHz
4 Gig RAM
Apple Cinema Display 23"
2x500 GB, 1x250GB Disks
Mac OS X Leopard 10.5.2