The ASUS TUF Gaming X570-Plus is 6 layers, and 12+2 VRM's for $189. Seems pretty decent for the price. Asus MotherboardMaybe, maybe not. The cheap x570 boards are 4-layer. Early chatter was that PCI-SIG set 6-layer PCBs as a minimum for the circuitry necessary to carry PCIe 4.0 signals (essentially, PCIe 3.0 can go over one layer while 4.0 can't, or something like that).