siman0 :
I'm not going to lie here that's fairly impressive given its size. Its probably the best ITX board for the 9XXX series I don't think it deserves a 2/5 just because it cant support one of Intel's ridiculously power hungry CPU...
Update: I reset the firmware after writing the article, booted up, started Prime95 small-FFT's, and the system did a hard reset (overcurrent protection). And you still want something higher than the middle score of 2.5?
It would probably have gotten a 3 or 3.5 if the 9700K were Intel's top CPU, but what we're really looking at with this board is Z370-class power regulation on the Z390. We're assuming the reason Intel delayed the Z390 is that they wanted to get manufacturers to support the power specs of the 9900K. After all, the H370 and B360 are based on the Z370, and the derived chipsets were released first for a reason.
Moreover, if you look at the power consumption, it looks like this board's biggest power shortcoming could have been addressed in firmware. It shouldn't need this much core voltage to run a 8C/16T load on the 9900K at 4.70 GHz.