How To Change Gigabyte UEFI Boot Logo?

[melvyn]

I ended up using Face Wizard from a Windows 7 partition, didn't try it from a virtual machine.

I used a totally black image, so essentially nothing appears, the first thing I see is a brief text spinner, then the Chimera boot screen.

 

[foster]

I just did changed the Logo on a Gigabyte GA-Z87X-UD3H

The image I used was 1680 x 1050 and it worked perfectly.
The bios still shows how to enter BIOS Boot Device and Flash Bios

So UEFI BIOS must allow larger files