I have the Tiachi ...... it's a decent board. I can't compare it to the Crosshair V I Hero but as it compared to how my Crosshair Formula z ....... well it isn't in the same quality. From myI. Limited time lately to play around with it ...... this board has a fair amount of VDROOP. Once I figured out the LLC the board is able to correct it and provide stable voltage. That being said when you set 1.375v you should get that in a top tier board ..... when I set 1.375 and see 1.362v ...... that's a big difference especially for a top tier board.
Now I was shopping on a budget and came across a great deal so I am very happy with the board as it is would I still say that if I had paid full price $330 canadian...... no I wouldn't. If I was looking for a top tier board and are ready to drop that kind of money on a board like this I would now be looking at the Crosshair Hero. Ask me this in a month after I have played with the board more I might have a different answer and my above comments might be to harsh for the board after such a limited experience so far. Check the link below I have a couple screenshots in another thread ......
http://www.overclockers.com/forums/showthread.php/782241-Post-your-AMD-Ryzen-Overclocks