JohnnyEM

That's a great workaround. Thanks.

I looked thoroughly in my Asus AMI Aptio BIOS/UEFI bios, but there's no option to enable the Compatibility Support Module. However, I was trying to boot with a 4GB USB Thumb drive without success and decided to try with a 2GB USB Thumb Drive. It worked. I can boot into Setup 1.10b5 with the 2GB Thumb Drive. Now, the problem is with chainloading. I'm using chainloader uefi that chainloads to the Tianocore UEFI image. After navigating to the Tianocore image Boot Manager, I'm presented with 3 options (my laptop has 2 hardrives): EFI USB Device EFI HARD DRIVE EFI HARD DRIVE 1 Selecting EFI HARD DRIVE stops at the grub rescue> prompt ( I also have Ubuntu 12.10 UEFI installed) Selecting EFI HARD DRIVE 1 gives some booting activity, but it stops at a black screen with a cursor The OS I'm trying to boot into is Windows 7 x64 UEFI.

Thanks for the suggestion, but I have an Asus laptop with AMI Aptio UEFI bios, not a Phoenix UEFI bios. The Compatibility Support Module page seem to apply to Phoenix UEFI bios. In think the UEFI incompatibility is with the UEFI bootloader in Setup 1.10b5. I have windows 7 and Ubuntu 12.10 booting perfectly fine in UEFI mode. What is the boot process in UEFI mode? Is it: UEFI BIOS-> Tianocore UEFI-> Setup 1.10b5-> chainloader-> Windows OS?

Han anyone managed to get the latest DIY eGPU Setup 1.10b5 to work in uefi mode? I followed the instructions, setup-disk-image added a boot entry for Setup 1.10b5, but that doesn't work in uefi mode. I also followed the instructions with RMPrepUSB to create a bootable USB stick, but I keep getting an error message about inserting a valid boot disk. So, has anyone made the setup 1.x work in uefi mode?