1700X Overclock Mystery! Need Help

Anybody have a hypothesis as to why my 1700X is scoring worse at 4GHz than at stock frequencies?

 

The only thing I can think of is that the 4-pin power on this Biostar mITX board isn't providing the needed power causing the OC to fail, thus degrading total performance overall.

 

Top two results are my PC

 

Benchmark.JPG