I bought this comparatively expensive ASUS Pro WS X570-ACE motherboard because it was advertised as "workstation" class but since the last BIOS update (version 1302) it's been very unstable, regularly not POSTing on cold boot or restart and not waking from sleep fully (on wake the fans will spin up and USB hub and monitor will turn on, but there's no signal to monitor or any other signs of life). During POST it will often halt at the CPU check or RAM check or just as likely POST and boot fine. Sometimes I'll need to cold boot or restart 10-20 times before I can get into BIOS. Other times it'll boot without a hiccup. Once booted, it's rock solid and stable - if it weren't wasteful I'd just keep the thing on 24/7.
I've submitted support requests to ASUS three times now and followed most of the suggestions, although I can't revert to the previous BIOS because some software I rely on (Substance Painter) doesn't work properly with the old BIOS. This seems to be an obvious BIOS issue to me but there's no confirmation from ASUS or ETA on a new version of the BIOS.
Is there anything else I can check or try myself? Should I continue waiting for a new BIOS version or cut my losses and return the motherboard before the warranty expires?
Here's my full system specs:
ASUS Pro WS X570 ACE AM4 ATX Motherboard
AMD Ryzen 9 3900X
be quiet! Dark Rock Pro 4 Cooler
64GB Corsair (4x16) DDR4 3200Mhz Vengeance LPX RAM
ASUS RTX2080Ti 11GB ROG STRIX O11G Gaming PCIe Video Card
Corsair HX750i Platinum 750W Power Supply
2TB Samsung 970 Evo PLUS M.2 NVMe PCIe SSD
2 x 2TB Samsung 860 QVO 2.5" SSD
SilverStone FS204B SilverStone FS202B 5.25" To 2.5" Hot Swap Drive Bay
ASUS PCE-AC58BT Dual Band Wireless-AC2100 PCIe Network Card with Bluetooth
NZXT Internal USB Hub
SilverStone ECU04E USB 3.1 Gen 2 PCI-E Card
Microsoft Windows 10 Pro 64bit
Thanks in advance for any advice!