The F7+Fn combo makes the 970m work because it sees the single 970m as a different card compared to the card that is used when there is intel graphics enabled as well as the 970m - even though they are the same card  physically.

Either that or it is because intel graphics is forcibly disconnected so it can't interfere?

Even though this works as a short term fix, I want to know what CUDAminer has done to break the optimus settings in my computer.

Do you think it is a bios issue or a vbios issue? Because I got the vbios from the working 970m in discreet mode and I was thinking of flashing the other 970m? But I have created a DOS bootable USB but I can't figure out how to boot from this as the BIOS makes me select the file path of the USB manually and I don't really know what I am doing with that haha