Mactracker may give a clue.
<www.mactracker.ca>

I looked but could see nothing about which software can be run.
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Regards from brianF
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On 06/11/2010, at 11:20 AM, Erik Richard Sørensen wrote:

> Hey All-knowning
> 
> I know this is a bit OT, but anyway... - I've just bought a PowerMac G5 Dual 1,8ghz 2005 model. Right now it is running 10.5.8 on the std. 80gb HD, but I plan to put at least 2x1tb HDs into this monster. - One for the systems 10.4.11 and
> 10.5.8 and the other disk is meant as archive disk...