Fans Overworking in Leopard

Hi All --
Since installing Leopard, my cooling fans (PowerMac G5 Dual tower) periodically go nuts. Sometimes they correct themselves, but this morning, I awoke to find them running at top speed and I couldn't get the computer to wake up from black screen.
Any ideas?

Thanks Lord,
I´m not more alone with this problem, like I thought!
I have not directly a solution, but it helped me a little bit, try to change the processor speed ffrom automatic to maximum!
It will sometimes still blow like a helicopter, but not more so long; what also helped a little bit, I upgraded my RAM, from 1 to 5 GB! The helicopter periods are also shorter as before!
I know, not a big help, but i instandly hope that 10.5.2 will fix the problem! It`s like the first days of Tiger!
Good luck

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Hi Jack
Have you tried [resetting the SMU|http://support.apple.com/kb/HT1436]?
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Thanks K T and Pondini.
That's really what I was looking for Ikrupp, some figures from other users under moderately intensive operations (not writing emails!).
Yesterday, when I had finished using Compressor the temperature started dropping from almost 180°F and when it reached 176°F the fan had also dropped to 1199rpm so it looks as though it doesn't speed up until the temperature exceeds 176°F.
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Is the Leopard DVD a retail purchased full installer?
How much HD space do you have left? How much RAM do you have installed?
Any problems that you are having w/your current OS must be resolved prior to upgrading an OS.
"Snow" Leopard (10.6) is for Intel Macs only. So make sure you are trying to install just Leopard (10.5.x).

Fans Overworking in Leopard

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