I can't seem to be able to boot from a pendrive on Gigabyte H110-D3A with above 4G decoding enabled on the Nvidia platform.  I'm fairly convinced this is due to Etcher converting to MBR instead of GPT.  Any input would be greatly appreciated.
 

Maybe you missed a step in the BIOS setup for your MoBo. I know I did and had to do it again.
 Check under " How to Set BIOS for Mining ?" In this link:

https://www.gigabyte.com/microsite/462/mining.html