Great cooler for small form factors, with the possibility of a aufzustecken grüßeren cooler

I run the fan on a ASRock E3C226D2I server / workstation motherboard (Socket 1150 Mini-ITX) with a Core i3 the Haswell generation. Due to the small Mini-ITX form factor, I've been looking a long time for a good cooler that fits. Due to the extent I have, even if it was close, decided on this one and it's side barely one millimeter too much or too little space. Since I still had some space at the top, I've replaced the fan by a higher, slower rotating Noctua fan, which was no problem.

The cooler the larger and slower fan ensures that the processor is scarcely hotter than the air to the motherboard (a few degrees difference at idle), and that with whisper-quiet operation. Am completely satisfied with the choice and would buy it immediately.