The Scythe Orochi! A beast of a heatsink! Absolutely massive!
A variety of attachments help you fit it to any socket type and there's a free sampling of thermal gunk, too.
Look at that fan! That's 140mm! At 500RPM you won't even hear that thing running. But you know what? - I'm not even going to mount it, because we don't want a single moving part in this build.
The CPU retention clips are solid; they attach onto the bottom of the heatsink itself and will hold the thing firm against your board. This is great because despite all the aluminium fins on this thing, it is HEAVY.