No VGA - B550 Vision-D + 2x Titan X 12gb

[aBav.Normie-Pleb]

1. Use Gigabyte’s USB flashback functionality to reflash the BIOS

• if it doesn’t help, then

2. Take out the GPUs, the CPU (!) and the CMOS battery, wait a few minutes then reseat them, then repeat 1)

This issue sounds familiar to something I’ve been experiencing with a few ASRock X570 Taichi Razer Editions, I think it’s a bug with certain newer UEFI-supporting GPUs and AMD’s current AGESA, at first I thought it was only Radeon VII GPUs but then I also experienced it with a 3090. There is some non-volatile area of UEFI settings that seems to lock up and the motherboard is f’d afterwards (CMOS Resets without any effect).

One ASRock X570 Taichi Razer Edition had been completely bricked (Error code 00, even USB flashback did no longer work, switching GPUs or only using a single GPU did not help) but with an older 2015 Maxwell-based GTX 960 2 GB it booted up again normally, after reflashing the UEFI via UEFI GUI and then with USB flashback the Radeon VIIs and the 3090 worked again, too.

My previous observations:

Why Asus Pro WS X570-ACE not working with 3 GPUs? Code 43

@Seff As mentioned I tried to see if I could recreate your issues. While I don’t have more than one RTX 30 GPU I tried using two Radeon VIIs and ran into something that might result in the issues you’ve been experiencing with NVIDIA GPUs. But I am not certain about this and your difficulties might have a different cause. (Unfortunately I am cursed regarding technology and am used to it never working as intended at first) Short answer: The key might have been you taking the CPU out of the socket. It’s not that the 3700X is defective or that the 3200G works better - it’s that there is some setting in the UEFI that is non-volatile (CMOS resets without any effect) that can bug up. The patterns I’ve discovered with a different motherboard model (ASRock X570 Taichi Razer Edition, two completely separate systems where the only shared parts were the two GPUs). Stage 1 - 1 GPU - Everything fine: No matter in which slot (PCIe x16 #1 (x16, from CPU), PCIe x16 #2 (x8, from CPU) or PCIe x16 #3 (x4, from X570 chipset) each of the two GPUs works splendidly. Stage 2 - 2 GPUs - Let the games begin: With the second GPU at first it works fine (using CPU PCIe lanes only, so it’s running with x8/x8), Windows’ Device Manager and the driver shows both GPUs. Then some time later after a power cycle the second GPU no longer shows up, no matter which one and reseating the AIC has no effect. Stage 3 - UEFI malfunctions: !!! At this stage USB BIOS flashback does no longer work!!! (*Note: ErP/Deep Sleep is NOT enabled, otherwise this would be expected since the motherboard doesn’t get the required 5 V stand by power line if this setting is enabled) The ASRock X570 Taichi Razer Edition has - like many ASRock motherboards - an USB flasback option: If you plug in an USB stick formatted with the FAT file system in a certain USB port at the back IO shield of the motherboard and copy the BIOS file renamed to a specific name on it the motherboard can reflash the BIOS only with a PSU a…