RX6600XT Problem with a single card

Hi All, I have a rig with 3 x 6600xt. One is a Powercolor, one is an MSI and one is a Sapphire. With the clocks previously I’ve always had them running around 32.5MH/s with 52W on average no problem.

I’ve tried doing some modifications to the settings (stupidly) and now I’ve caused instability in the Sapphire card. The system will crash with GPU Driver errors if I apply ANY memory clock to the sapphire before the system starts. If the system is already running, and miner is up, I can apply any clocks on to the sapphire card and it runs flawelssly. However, whenever it reboots the sapphire card is causing GPU driver error. Any suggestions?