Because the Radeon 9800 Pro Mac Edition isn't being adequately utilised by this CPU I do plan to swap this card out with an Nvidia 4600ti Mac Edition in the future and place the 9800 Pro into my QuickSilver.
In this case I'll try fitting a 9200 LE (I'll have to purchase another one) in the place of the RAGE 128 to handle the OS 9 side of things, as the 9200 LE in my G3 runs OS 9 with acceleration, but when fitting the card into this machine together with the 9800 Pro, all I got when the desktop came up was a grey screen with a movable curser. (All of the extensions did seem to load properly though, including the ATI extension) So there may be a conflict between these two cards as they are similar in a way. The Nvidia 4600ti and the 9200 LE on the other hand are not, so I may be able to get it to work!