Hi - Wondering if theres any other graphics cards that can be used with Catalyst, apart from the 9800, not for content playback of output, but just for remote monitoring and remote commands of other servers

Scenario is:
I have a G4 500 dual processor mac with its original ATIRage128Pro(AGP) and 512 RAM - so its not really good enough to playback content - but I have used it to monitor the G5 catalyst servers via ethernet (situated away from the production desk) to send remote commands, move content etc. However, it does crash out sometimes (due to the graphics card)

I dont want to splash out hundreds on a 9800, because the mac isn't really fast enough for content use - but is there a compromise, where I could get a cheaper card, that wouldnt crash out the mac so often when using catalyst as a remote tool?

(for content playback, I have use of decent G5 macs, but its a bit of a waste using one for remote monitoring etc)

any suggestions welcome.....