OpenCore boot issues after GPU swap

Hello everyone,

about two years ago I successfully installed MacOS BigSur on my Computer. Because I wasn’t planning on doing anything special on my Hackintosh, I choose a Radeon HD 7750 as my GPU as I got a cheap one from eBay. I’ve never had any problems with my system. But recently my GPU refused to provide any output, so I bought a new one - the same model. However, with the new card installed I cannot make it to the boot picker anymore. I used the Debug version of OpenCore, hoping I would get the reason on why it now refuses to even load the picker, but I don’t seem to understand why it behaves that way. And because I’m not as fit in Hackintosh as I used to be, I’m asking you for help. The only thing that differs is that my old GPU was Version 1.1 and the “new“ one is 1.0. I don’t know if that may be the reason. I also tried everything suggested in the OpenCore troubleshoot section - no luck.

Thank you in advance for your help!