I am the one who wrote out that guide, but I suppose my G5 hasnt blown up yet. compared to my LCS panasonic 2.7ghz, the LCS kept around 84c-86c the entire time, whereas my passive kept from 85c-88c. Once the fans kick on the 2.7ghz passive, it brings it back down to 84c before they spin back down.

I just plan on running it till it burns down. Have 3 more G5s to use if it happens.