OC GUI:
I have attached below a copy of my working 0.6.8 Resources folder, with the non-en audio files removed, this makes it much smaller and easier to share.
Try this Resources folder in place of your current one, see if that helps with the GUI issue.
Picker List showing obsolete devices:
How do you have your SIP configured in your /OC/config.plist?
Maybe you should add/enable the ClearNvram tool and use that from the GUI or picker list in place of ResetNvram.
Gigabyte Bios:
Your Gigabyte Z77 board has a dual bios, same as my Z87/Z97 Haswell board(s). You could try switching to the alternative 'B' Bios chip (Backup). Normally the system will be running on the 'M' Bios (Main). Not sure if your board has the physical switch option for switching bios chips, my high end Z97 boards have this option.
If your board lacks the physical bios switch you may have to do one of the manual power button/reset button options listed below to force the system to re-flash the main bios or switch to the backup bios.
Method #1:
- Shut your PC down
- Hold the power button until the PC starts and shuts down again
- Press the power button again, your backup BIOS should kick in now and should re-flash the main BIOS if there's anything wrong with it.
Method #2:
- Shut your PC down
- Hold the power AND the reset button for about 10 sec, than release.
- Backup BIOS should kick in anytime soon now.
I couldn't find a link to your Z77X-UP
H-TH board, it kept throwing up Z77X-UP
4/5-TH boards, so I couldn't check to see if your board has a physical switch for the bios change.
To clear all the obsolete entries in your bios you may need to re-flash the bios. This would be your last resort, and it would be best to use the identical Bios version of the one you are currently using when doing this, as you don't want to mess up your bios so you can't boot.