Late 2004 G5 w/ PCI Express x16?

Question

The Mac Support page with the Late 2004 Powermac G5 user manual link is not working properly. So, I'm asking here.
Does the early model of Powermac G5 (Late 2004) have PCI Express x16 architecture on the motherboard? I have the Dual 2.0Ghz version. The reason I'm asking is that I'd like to upgrade the video card on it to a new Nvidia GeForce 7900 GT but that requires a PCI Express x16 slot.
Please let me know. If not, do you know what architecture it has? Thank you in advance.
Powermac G5 Dual 2GHz   Mac OS X (10.3.9)  

Answer 1

Just an update for those interested in video card options with AGP slots rather than the newer PCI Express architecture...
After communicating with the Strangedogs people, I went ahead and purchased an Nvidia GeForce 7800GS (256MB RAM) to be 'flashed' to work in a Mac system (read about 'flashing' BEFORE using it as an option). This is the BEST AGP card on the market today and with AGP dying out to PCI Express, you'll probably see fewer and fewer AGP cards in the future. My other AGP option was the ATI Radeon X800 XT 256MB RAM (Mac Version) but the GeForce uses the newer architecture and is suppposedly about 16% better in terms of high end performance (see http://www.barefeats.com/mutant3a.html). Obviously the PREFERRED option was to upgrade my entire system to PCI Express architecture, but as with many others, too much money for too little improvement at the moment.
Pros:
Performance boost (+16%)
Newer architecture
Cost about $100 less than ATI X800 XT Mac Version (cost is about the same with $100 cost of 'flashing' unless you can do it yourself)
Cons:
No dual-DVI for 30" Apple Cinema display
Modification to a PC designed card (not standard practice)
I currently have the ATI Radeon 9600 XT card, so I expect a big performance boost. I'll report with the results from Strangedogs and the 'flashing' of the 7800 GS...
Powermac G5 Dual 2GHz   Mac OS X (10.3.9)