Look's like you are right m8, the second gpu is stuck in 3d mode and dossent gear down too 2d mode, i checked 1 and 2 gpu, and while the 1 gpu said 2d mode 250 / 150 the 2 gpu said 3d mode 830 / 1250 :/
i wonder if this is fixed in some upcomming beta's
but anyone with this problem too?