Use Dashboard widget to display iMac G5 CPU temperature.
There are a total of 8 CPU's in here (2 per board)
cpu
Fotos de Henrique @fousp
Beautiful Bytes CPU pendant
Overview after decapping
Description & analysis: www.eevblog.com/forum/projects/avionics-teardown-looking-...
electronics
Cpu processor socket ift.tt/2kX4PfM
It's one of Freescale's Coldfire V4 cpus, the MCF5480. $42 in quantities of one, half that in quantities of one hundred. Integrated everything, all it needs is some ram, connectors, and power and it's ready to rock.