I tried to use AI Suite 3 (EZUpdate V3.00.11) to flash a BIOS (B365M-A) with a custom Logo.

It is a simple logo.

I have tried every format (BMP, JPG and PNG), but in the end the custom logo will appear with a lot of visible washed out jpeg-like compression, which is not necessary given how simple the logo is.

Can someone tell me what is the native format exactly, so the EZUpdate will just use the logo file directly, without conversion and compression?