Asus Sabertooth X79 No option to boot BD in UEFI Mode

[Astra27]

Title says all, I realized yesterday my Windows 10 was installed in Legacy mode so I let it make a system image last night so I could reinstall it in UEFI mode today. But in the boot menu I have no option to boot the BD in UEFI mode. Here's a screenshot cap.

http://m.imgur.com/WsfA6tp

Any help would be much appreciated.

 

[Astra27]

Well I changed the CSM to UEFI only mode and that worked.

 

[deenos]

Well I changed the CSM to UEFI only mode and that worked.

I'm having the same problem, I cannot get my Sabertooth X79 to boot to UEFI boot media. I've tried disabling CSM, I've tried leaving CSM enabled and changing it to UEFI only mode, I've disabled "Fast Boot" and "Secure Boot". I've tested my UEFI boot media on a different machine and it works fine.

Can you tell me exactly what your settings are in the BIOS? Also, which BIOS version are you running on your Sabertooth X79? This is driving me nuts!