Hey all! I’m tinkering with a Radeon Pro V340l (dual Vega 10 GPUs, 8GB Hynix HBM each) that I snagged off eBay. Trying to crossflash it to a Vega 56 vBIOS so it plays nice with Windows 10. Since AMD’s official Vega 56 BIOS only works with Samsung memory (and this card uses Hynix), I flashed both GPUs with an ASUS Strix Vega 56 BIOS instead (Using ATIFlash 2.93 as well as a CH341a hardware flasher).
Current Status:
GPU #1 works perfectly after flashing.
GPU #2 shows Code 43 in Device Manager. If I disable/re-enable it, Windows claims it’s "working," but it’s clearly not functional.
What I’ve Tried:
Latest Adrenalin + Enterprise drivers: Both fail immediately.
Using modded Radeon ID (R.ID) drivers: Only fully supports GPU #1.
This feels like a driver/software hiccup. I’ve dealt with similar weirdness before (like flashing a Firepro S9300x2 to Fury X BIOS), but this one’s got me stumped. I’ll drop some pics below for context. Anyone run into this before? Open to ideas! I also want to note that I am using my motherboard's integrated graphics for display out and am just planning on using the GPU's for compute or passing through to VM's for 3D rendering. My motherboard is an Asrock Rack EP2C612WS with dual Xeon E5-2699v3's. It could be a PCIe config issue but I don't know what other settings to mess with. Thanks!
(Note: The cards only display as a V64 due to the driver. They are flashed with This Bios, not a Vega 64 one.)
