Just installed mine, had to lapp the bottom surface. AC5, clipped in easily, cept the clip being on the wrong side of the board....
Fits nice, all I had to do was remove the extender part of the upper cooling duct that just snaps in to make it fit my Antec 1050B case.
Running F@H now letting it set into the AC. 95F with a case temp of 77F.