Noctua NH-U12P CPU Cooler
Installation is slightly trickier on the Noctua NH-U12P than it was on the Akasa Revo.
After this is complete you have to install two plates onto the cooler itself which act as retention plates for the two screws (one either side) to grip onto. Whilst the most fiddly bit of this is installing the backplate onto the motherboard, the whole thing took no longer than 20mins (including taking out the motherboard again as it's a bit of a tight fit to fit a fan in the A+ I was using.
As you can see, the fixing is very good and feels very solid. Certainly this is a better solution for retention than the standard 4 clips on socket 775. On the negative side, you have to put up with a slightly fiddly install, including taking out the motherboard if you're replacing another cooler.
Let's see what results we get.