Posts: 42 from 2020/11/17
From: Lyon, France
It's normal behaviour.
MorphOS doesn't use NAP with the G5. Your CPU idles at its full speed frequency.
It has already been discussed on this forum.
MacOS knows how to change speed frequency of the G5, MorphOS doesn't.
For example, my G5 2,7 Ghz (and Beworld's too) is regulated at 86°C with fans at normal speed. When the temperature gets higher, fans ramp up to maintain 86°C.
This is the same under MacOS by the way : fans will ramp up loud if speed geths higher than 86°C on my 2,7Ghz G5 (fans are not controlled by the OS but by the hardware). The OS only controls the frequency of the CPU (and only MacOS does this, not MorphOS). It is called NAP.
BTW, 75°C is not overheating for you G5 (otherwise, the system would shut down automatically), the G5 is known to get hot.
PowerMac G5 2,7 Ghz / Radeon 9650 / MorphOS 3.15
AmigaOne X1000 (unused ATM)