Asus screwed up on the heat sink design. I guess mine is the worst case yet -- the IOH temperature was settling around 79 degrees C at idle. I discovered that the heat sink was making virtually no contact. The southbridge heatsink was only marginally better. I ended up filing down enough metal from the three support posts on the bootom of the IOH heat sink to ensure positive contact. Needless to say, I removed the sticky mess and replaced it with AS. Now I am running below 50 degrees at idle.

Charlie