Up to this point, the ASUS TUF Z390-Pro Gaming had proven to be an attractive, reliable board, but nothing about it really stood out to me. It turns out there really is something special here, though. The ASUS TUF Z390-Pro Gaming is by far and away the most stable clocking Z390 board I have tested.
The ASUS TUF Z390-Pro Gaming tested nominally stable at 5.2 GHz all core and 1.385 V on my 9900k sample, a feat approached but not quite reached by only another board. That in itself is pretty impressive even considering a few months of BIOS updates. More impressive was memory stability, however.
The G.SKILL kit I use for board testing is notoriously sensitive. Most of the time, I consider a board to be of good quality if it can simply run the kit's XMP settings. The ASUS TUF Z390-Pro Gaming handled that easily, so I pushed on. I was able to get the kit stable at 4000 MHz without changing any timings or voltages from their XMP defaults. That is the mark of a truly capable motherboard. The ASUS TUF Z390-Pro Gaming also features a MEMOK! II switch to help recover from unstable overclocks and for automatic memory training.