Gigabyte Z87: No ReBar after applying FFS

[vshah23]

Setup:

• OS: Windows 11
• Mobo: Gigabyte Z87N-WIFI
• GPU: AMD RX 6600XT
• BIOS: F6

Things I tried:

Above 4G Decode:

• Followed the guide to enable hidden 4g decoding by booting grub shell efi from a spare Windows USB:
  • EDIT: Just checked the FAQs and realized that Memory Remap is not what I was supposed to be looking for...
  • EDIT 2: I'm not able to find the Above 4G Decode offset from the files that IFRExtractor outputs. I do see the following string in the hex view in UEFITool though:
    • Above 4G Decoding�Enables or Disables 64bit capable Devices to be Decoded in Above 4G Address Space (Only if System Supports 64 bit PCI Decoding).

ReBar:

• First thing I tried before I found this repo was applying the registry edits for enabling ReBar on unsupported GPUs, but I now realize that probably doesn't apply to my hardware anyway. I left the registry edits in place as I continued with the next steps.
• Added FFS module to F6 BIOS from above hardware section
• Flashed BIOS with patched version
• CSM off
• Secure Boot off
• Played around with TOLUD (not sure if necessary or applicable, left it at 0xC for 3.25 setting for now, default was dynamic or 0x0):
  • 

[xCuri0]

Did you enable it with ReBarState ?

[vshah23]

That worked, thanks!

I misread the documentation and thought I was supposed to follow the ReBarState portion of the guide after seeing ReBar enabled in Adrenaline software.

Now I just have the issue of trying to enable Above 4G Decode, but I'm guessing that's the same issue as #14...

[vshah23]

Gigabyte told me my board is too old to support Above 4G Decoding when I asked them to provide BIOS with it enabled :(