The Extreme version varies in one respect I've noticed: the "X-bracket" that fits on top of the heatsink-base for the Extreme is a cross-bar and pivot arrangement with a screw running through the two metal bars -- each with diagonal mounting holes. The original Ultra 120 was a single X-shaped piece of metal, and it was just a tad tricky getting it through the heatpipes to mount it.
This new bracket seems to be quite sturdy, and requires just a little force to twist the pieces around the screw-fitting. Even so, I'm always counting the number of parts in an assembly. The fewer the better, fewer is simpler, and simple is best.
This new bracket seems to be quite sturdy, and requires just a little force to twist the pieces around the screw-fitting. Even so, I'm always counting the number of parts in an assembly. The fewer the better, fewer is simpler, and simple is best.