Nice. Yeah my previous setup was a janky dual EKWB Phoenix which was gutted and made into a custom loop, but a real custom loop is so much better. The GPU barely hits 51-54c on full load! These Hardware Labs GTS slim rads were recommended by some hardcore watercooling enthusiasts, and they were right on the money. With slim rads, you can run lower RPM fans in 120mm size (which have high static pressure) and have a very quiet system.
1. If CSM is disabled (and it should be) ASUS logo will be big and the "Press DEL to enter BIOS..." text at bottom will be big too. This is normal.
2. Clover icons should look normal with CSM disabled. Maybe your Radeon VII doesn't have the latest vBIOS which added EFI GOP as AMD released it after the GPU was released?
ASRock has a version still up.
3. 4G Decode should be set to
ON and on AUTO for "First VGA 4G Decode".