10G-P5-3897-KL upgraded with the Hybrid Kit add-on.  I was given a BIOS upgrade tool on this forum to make the card show up as the Hybrid Edition in software and RGB control, which worked perfectly.
 
The Hybrid Kit failed after 5 months and is being returned for a refund for RMA.  I have installed the air cooler back on the card.
 
I need to now flash the Ftw3 Ultra OC bios back onto the card, but when I use the download in the 30-series megathread it just says that the 'firmware is up to date' and doesn't apply the bios.
 
Please help.

EVGA GeForce 30 Series HYBRID/XOC/Default BIOS Thread
 
You followed all the directions in the thread above ?
 
(excerpts)
 
PSA#1: TURN OFF "FAST BOOT" IN YOUR MOTHERBOARD BIOS.
 
--> Once again, turn off Fast Boot in your motherboard BIOS while you're playing around with flashing your BIOS.  If fast boot is enabled, Windows will treat your card as the same GPU unless there's an obvious change, such as you change from a GeForce RTX 3080 to a GeForce RTX 3090, for example.  Otherwise, Windows will just assume that nothing in your system has changed, including the DeviceID, which will change when you flash to a different BIOS version.  Because Windows doesn't update the information automatically, it will give Precision X1 the wrong information, which is how many of you have run into an MCU flashing issue.  If fast boot is disabled, Windows should check the DeviceID of each hardware component during each boot.  It's still worth it to restart a couple times after flashing or flipping the switch over to a different BIOS to make sure everything is working normally. 
So, please make sure to turn off Fast Boot until you are done flashing, and you've decided on which BIOS switch you want to use.  At that point, you can restart and re-enable Fast Boot again, if you wish.
 
 
 
PSA#2: DISABLE CSM IN YOUR MOTHERBOARD BIOS BEFORE FLASHING A REBAR BIOS.

Sajin

Attempt failed.  I did the --protectoff beforehand too.
 

C:\nvflash>nvflash64.exe -6 EVGA.RTX3080.10240.201015.rom
NVIDIA Firmware Update Utility (Version 5.735.0)
Copyright (C) 1993-2021, NVIDIA Corporation. All rights reserved.


Checking for matches between display adapter(s) and image(s)...

WARNING: None of the firmware image compatible PCI Device ID's
match the PCI Device ID of the adapter.
  Adapter PCI Device ID: 2216
  Firmware image PCI Device ID: 2206
WARNING: Firmware image PCI Subsystem ID (3842.3897)
  does not match adapter PCI Subsystem ID (3842.4898).
WARNING: None of the firmware image compatible Board ID's
match the Board ID of the adapter.
  Adapter Board ID: 02D6
  Firmware image Board ID: 023F

NOTE: Exception caught.
Nothing changed!



ERROR: GPU PCI Device ID mismatch.

 
Looking at the thread you linked, the user had to RMA the board.

GL
 

No problem. 👍😎

No problem.