I upgraded from a MSI AMD R7 260X that I had no trouble seeing the BIOS/UEFI screen during boot.
Now I can't, the screen goes dark until the O/S (Win7 Pro x64) loads.
My monitor is a Asus PA-248Q and I'm using the DisplayPort connection as I was before. The only change is the card. Using the VGA input thru an active DVI to VGA adapter, I do see the BIOS screen with that input.
I'm using the conventional BIOS setup, not UEFI if that matters which is what it has been. I made no changes other than the card.
Input needed.