Everest works fine, and it's worth the money for a full version IMHO.

Here's an excerpt from Everest's sensor debug report:

Code:
Sensor Properties	
Sensor Type	W83627DHG + W83791D + ADT7475 + ADP3228  (ISA 290h, SMB 2Ch/2Eh/20h)
GPU Sensor Type	Diode  (ATI-Diode)
Motherboard Name	Asus Maximus Extreme / Formula
Chassis Intrusion Detected	No