Yes, pretty tight, but the Scythe Shuriken Rev. B will fit on the Intel DH77DF mITX motherboard and using the Silverstone Sugo SG05-450 case. The Shuriken was among few after market coolers I could find that will clear the internal slots and memory. It installed quite easily on the DH77DF and the custom slim PWM fan is whisper quiet.
Ive attached some pics for reference. This seems to be the best orientation relative to the DH77DF PCIe slot.
Although there is slight overhang of the heat pipes over the #1 memory slot, I am still able to install and uninstall standard height DDR memory after cooler installation.
Even still, as shown above, it is an uncomfortably close fit alongside the PCIe card but not out of the question assuming the cards underside is pretty flat. Others have suggested placing some foam between them as insurance against shorts.
Not sure, but Id imagine this might be similar for other ITX boards, and at this price point, Scythes low-profile and quiet engineering is very commendable.