Bios 7201, 3900x, C6H, 4 sticks of B die at D.O.C.P 3200mhz 1.35v - no issues so far - ran Aida64 stress test for 30min which all cores were at around 4.1ghz consistently, 77C CPU, voltage CPU was 1.36 when stress testing. Doing other stuff I notice max cpu speed was 4.5ghz, never saw it above that. Will have to do much more testing and configuring to maximize performance.
PCIe 4 works good with 5700XT 5th AV, PCIe 3 gave around 15gb/s in 3dMark PCI Express feature test and about 25gb/s with PCIe 4. In 3dMark it did not recognize that it was PCIe 4 even though the performance indicated it was. Still had it as PCIe 3.
ASUS C6H BIOS 0002 w/SMU 46.49.0, Ryzen 3900x @ PBO, 32gb TridentZ 3200 at 3733 16-16-16-36 Samsung B (2x F4-3200C14D-16GTZSK + 2x F4-3200C14D-16GTZKW), Radeon 5700 XT Lisa Su, Intel P600 1TB + 660 2TB M.2 drives, 1600w EVGA Power and Cooling PS, Samsung HDR 144hz FreeSync monitor, Win 10 64