Is it a laptop? From a bit of googling people are saying pulling the BIOs battery and resetting it fixes it.
Nope, my weird Chinese PIO board. Edit: thinking about it I might have disabled hyper-threading, so maybe that's it?
I don’t think so, it’s a fully fledged 1151 chip, The are normally power limited (L2 power limit is 35W), and it would normally hit power limits, not thermally throttle. That said, the board supports 6th-9th Gen chips, so I guess anything is possible as I can only imagine the stuff the put in place to give 4 generations of support.
Could be that it IS hitting power rather than thermal throttle, but HWinfo is reporting incorrectly due to the unknown board (or the board itself is flipping the wrong register bit to indicate throttling).