Still idled at around 70-71c. MorphOS doesnt step down the CPU like OS X does so its always clocked higher. Right now as of typing this with minimal CPU load its at 71.7. Moved the G5 back into my room which is a bit higher in ambient temp.

{update}

After about an hours worth of use, I got the temperature to peak out at 75.9c. Ambient temps have a huge factor on how cool it will run for you.

[ Edited by Doffo 23.06.2013 - 14:07 ]