Considering its high 65W TDP, no fanless case is available for the
NUC8I7HNK. This didn't stop this Taiwanese reader from creating his own solution. Granted, Intel's Turbo Boost had to be disabled but the 200 x 100 x 50mm heat sink is keeping the i7-8705G at acceptable temperatures (83°C during a stress test).
Source:
ptt.cc