yes
yes
14.3 is beta and uses Mantel and multiple GPUs
I have Sword of the Stars II and it needs the Radeon for it does not like integrated Intel
I also have Steam using the high performance along with Portal and the Spore series doing the same.
I know it is using some of the Radeon for the Intel does not give me 1600 x 900.
Maybe it is me using this screen size instead of the default that is messing thing up.
No bother since it works fine on power saving and my laptop stays cooler.