GPU-Z (under Windows) shows the UEFI capability of the graphics card
GPU-Z
GPU-Z with UEFI graphic card information
Just some thoughts
GPU-Z with UEFI graphic card information
Windows 10 VM regains full performance when Spectre protection is disabled
Windows 10 on bare metal vs. VM with and without Spectre protection
Details of 2D benchmarks performed on different Windows 10 configurations
Passmark results running Windows 10 Pro 64 bit in VMs created with virt-manager, versus bare metal