Today's Sierra video card swap anomaly

[In-N-Out]

Running Sierra 12.1 here. Ever since I switched over to a EVGA Geforce GTX 750TI today I immediately noticed during the boot process that the Apple logo and progress bar are somewhat stretched and approximately 3 to 4 times larger in size then they've ever been. It's the same with the size of the Clover icons if you boot from the USB stick. Does anyone know what's causing this and how one can correct it? Both the HDMI and DP outputs display the symptom.

 

[Fl0r!an]

Switch your BIOS to full UEFI mode (disable CSM).

 

[In-N-Out]

Thanks, but BIOS is already in that state. I've decide to return the card.