Thank you for your response.
After reading this apple support document:
http://support.apple.com/specs/power...Late_2004.html
i thought there were 2x2ghz models in the late 2004 family.
Right now, i'm just looking for a bit of a speed bump. My main machine is a G4 Digital Audio. It came with a 733mhz processor which i upgraded to a 1.6ghz dual version.
The 'new' machine must have PCI-X slots, because i'm trying to avoid to have to buy new audio cards, so all PCIe versions are out of the question.
I had an offer to buy a Late 2004 model, but i am afraid it could turn out to be an original Power Mac G5 series model, for the seller got confused by the different models himself (my fault, i guess

) , but i am waiting for a screenshot of the system profiler, which should reveal what model it is, shouldn't it?
At least he gave me the serial number of the mac, which is CK44SHH058J. And the graphics card installed is a NVIDIA GeForce FX 5200 Ultra.
But this does not really help me determining the model.
cheers,
peer