- May 9, 2012
- MAXIMUS VIII RANGER
- GTX 980 Ti
- Mobile Phone
If the installation usb is uefi then the boot should be uefi also i.e. there should be UEFI before the entry which you select, other are legacy.
Have you tried to set boot to uefi only (somewhere in you bios settings)? Can you see the usb media then? If not then there is something wrong with the stick or usb port you are using. Try different port.