You can either plug the drive into a working machine (via usb/firewire adapter or sata) to remove the undesired kexts from /system/library/extensions and repair permissions. You could also do this via the command line in single user mode but you'll have to research that yourself. First you should simply try booting without caches or into safe mode from the clover GUI and see if you can get in that way. If you installed the chimera bootloader, you'll probably need to reformat and reinstall OS X so back up all your files and the files from the EFI partition that you created.
No. The BIOS and settings are stored on a chip on the mobo so erasing the drive won't effect it.
Hi. I'll try to look at your ioreg later tonight. If CineBench is low, I wouldn't worry about it. There's not much on the Mac side that requires or taxes OpenGL a lot. Windows drivers from nvidia and AMD usually work better as that is the biggest part of their market and they devote more attention there. If your OpenCL benches are low compared to other users on the Mac side with the same card then you might want to worry. Everything you'd want a high end gpu for on a Mac mostly uses cuda or OpenCL.
Do apps like after effects report only 32gb or just system profiler?
Unless you inject the cards into the acpi tables you'll have bugs. I'm supprised you didn't have issues with 2 cards. I use SSDTs for injecting all off board devices. I've been meaning to create a guide for this but haven't gotten around to it so it will be faster for me to just make you some. Please save me an ioreg so I can see the addresses of slots your cards are in. Also you should remake your dsdt and see if that helps.
