I found this tool (v1) that worked for me to insert UEFI support into the original VBIOS!
After a cold reboot the card is bricked. Atiflash and ati-win-flash both do not recognize the card being present in the system at all.
Is there another way to overwrite the VBIOS back to original? I have made a backup of the rom of course.
GV-R667D3-2GI/F1 bricked my his 6670 isilence 5,I unplug my his 6670 isilence 5,set UEFI to iGFX,plug my his 6670 isilence 5,Atiflash and ati-win-flash both do recognize the card being present in the system,I flashed it and it works.
G:\atiflash>AtiFlash -p -f 0 Turks.rom
Old SSID: 2557
New SSID: 2012
Old DeviceID: 6758
New DeviceID: 6758
Old Product Name: GV-R667D3-2GI/F1
New Product Name: TURKS XT 1G/128B DDR3 DLDVI-D/VGA/HDMI 800E/800M
Old BIOS Version: 013.012.000.040.000000
New BIOS Version: 013.012.000.009.039844
Flash type: M25P10/c
20000/20000h bytes programmed
20000/20000h bytes verified
Restart System To Complete VBIOS Update.
I tried to update the VBIOS on my Asus HD7950 because there was an update actually available for it. Once I tried the tool accepted that I had Windows 8.1 and Windows 10. However, the tool kept stating my I did not have a card which would support the update. I later found out the update was for Windows 8.1 Quick Boot. Well, after two days of trying and researching I found that Asus made a mistake on this card and others offering this update. My PC boots up super fast anyhow. So I don't really need it. And, the little dip switch on the HD7950 made no difference. I am happy I did not go for another flash tool. Because my card does NOT support the Quick Start feature anyhow. Just saying...
Confirmed,this UEFI VBIOS works,but it does not boot when I am using Secure Boot restore UEFI BIOS settings to default
Confirmed,it does not accelerate in UEFI BIOS.