Hello Martin ! Thanks for your answer.
> Fan control is left to the firmware and at least on PowerMacs (towers) > the machines do not run hot. That is good. On my MacBook Pro (Intel i7) I could make some ham and eggs ... > If you want to get one of such machines make sure to pick one with a > radeon card. Yes, found one, should be a 2 x 1,8 GHz with a Radeon 9something Pro which is not in the list of supported hardware for something like 160 (including cables and so on). I let me surprise what I will get.