The process is very simple. Your making this a bigger deal then it actually is. You must update from Windows 7, or 8.
1. Download UEFI Firmware updater from EVGA Tech Support.
2. Double-click "Updater.exe"
Your GPU Firmware has now been updated to UEFI GOP.
UEFI GOP is not a setting in the ASRock bios setup. The only thing you need to change:
Under the "Boot" menu set the type of boot to Ultra Fast Boot.
I don't know what else you need. It's that simple and doesn't warrant a step-by-step guide. It's only a single step as far as setting up the motherboard.
Make sure your booting Clover with UEFI and not a legacy method.
Insure your booting 100% UEFI by disabling CSM.
PS. Your ASRock motherboard may not have the Ultra Fast Boot option, now that I'm thinking about it. My board received support since BIOS v1.80 released (12/7/2012) December 7th, 2012
Robert I am intrigued by this graphics card and UEFI booting saga. Alas I can find no such upgrades for my HIS Radeon 6870.
Now this card works very well - at boot time there is a very short lag, but I get full resolution as it is both with HD4000 and the ATI6870.
Can you PLEEEEZE tell me/ sell me what the real time benefits are in using an Nvidia 6 series card, that buying something we want but do not need to save two seconds on boot.