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Save UEFI VBios & DX Support Bugs

Nov 28, 2004
30 (0.01/day)
Processor Core i7 7800X @ 4.4 GHz
Motherboard MSI X299 SLI Plus
Cooling Thermalright HR-02 Macho
Memory 32 GB Corsair LPX DDR4 3000 CL15 @ 3466 CL17 1T
Video Card(s) EVGA GTX 1070 FTW @ 2052/4253 @ 1,0v
Storage 2x Samsung 256 GB NVMe, 9x 1 TB WD RE4 @ RAID5
Display(s) Acer XF270HUA + Eizo S2431WH-GY
Case Corsair Obsidian 750D
Audio Device(s) Creative Labs SoundBlasterX AE-5
Power Supply EVGA SuperNova G2 650w
Mouse Logitech G403
Keyboard Logitech K120
Software Windows 10 Pro x64

When saving the VBios on a GTX 670 with official UEFI support, the file GPU-Z produces is bit-identical to the original file, no problem there.
When saving the VBios on a GTX 470 with legacy bios support only, the file GPU-Z produces is bit-identical to the original file, also no problem there.
But after i added UEFI GOP support to the GTX 470 bios (which GPU-Z correctly shows with its UEFI checkbox), i'm getting the error message "BIOS reading not supported on this device" after a few seconds.
FYI, both nvflash 5.165 and 5.236 are able to save this VBios bit-identical to the original modded file, see the attachment.


After the latest support for DX12 and change in displaying the Shader Model version in GPU-Z, the DX Support info box is kinda messed up on DX10 cards. On a HD 4830, it reads "10.1 / SM", see the attachment.