For it to work, you need to mount the EFI partition on the flash drive you generated and copy those files to the EFI/Clover folder, not to the partition that contains the installation files. You can mount the EFI partition using the EFI Mounter v3. You copy these files to the clover folder in the EFI folder (kext files goes into the kext/12.12 folder in the clover folder) and the config.plist file in the root of the clover folder. Then you should be able to boot into the installer.
I have a very similar system to this, details of which can be found on my profile. I would like to apologise from the cross post, as this was posted in its own thread a long while ago, however the advice I was given was to just obtain another GPU for installation. When I saw this thread I had a glimmer of hope, but the problem is exactly the same as before. I have followed the instructions to the letter, and copied the files where required.
When using the safe mode switch ( -x ), the system hangs:
View attachment 271441
When not using the safe mode switch, the system restarts at [pci configuration begin]:
View attachment 271442
I am very confused as to what the issue could be. I have also run optimised defaults in the BIOS, and reset back the options mentioned in the thread, to no avail. I have never been able to get to the first install screen. It has always hung or restarted on this system before I could get anywhere with it.
I would appreciate any help, thanks for your time!
When I have the chance, I will create a copy of my EFI folder. It's probably something with the configuration or something.