I have the BIX and it works great. I get idle temps of 34C and load temps of 38C (as measured by DD5 flat probe trimmed/dipped in AS3, slightly touching side of CPU core).
CPU - AMD XP 2000+ (Green AGOIA Y Core) @ 1725Mhz and 1.8Vcore. Ambient - 23 C
Here are the pics of my setup: