http://www.amd.com/us-en/Processors/TechnicalResources/...
As far as I'm concerned, this works. Scroll down to "AMD Dashboard Demo Software, Rev 2.0.0." Been using it since I did my build and even if its wrong, it still gives me headroom because its been reporting temps as high as 53C (load) with a MaxOrb in this SFF chassis...
Nonetheless, it SEEMS VERY ACCURATE. Idle temps are around 33C....
Note: You must install the AMD Athlon™ 64 X2 Dual Core Processor Driver for Windows XP before using this software.