RBE 1.13 is out and allows checksum correct flash.

[Toysoldier]

Uninstalled Cat 8.7 booted into safe mode used driver sweeper and installed Cat 8.8 Beta with driver 8.52 and got the following.



I then flashed the card with the ASUS TOP Bios and rebooted and everything went fine.

I then went into RBE 1.13 and did the same as above except for the tick in "also decrease voltages" flashed the card again and it now works fine.
But to be sure I will uninstall the drivers again and then reinstall and see what happens. I really like the 68 deg C idle temp together with the low noise profile.

EDIT

Uninstalled CAT 8.8 beta booted into safe + used driver sweeper and installed again and now it works fine.
So it looks like RBE 1.13's also decrease voltages feature is doing something CAT 8.8 Beta doesn't like.