3900x plus ASUS crosshair viii hero
3900x plus ASUS crosshair viii hero
Considering the upgrade of a 3900x motherboard and an ASUS X570 crosshair, the cost of adding these components might be quite high.
If you want to explore the board's capabilities and customize it, that’s fine—otherwise it doesn’t make much sense.
Are you requiring DMI 4.0 and SLI support? Since some B450 boards can manage a 3900x configuration, it depends on your specific setup.