With reference to minimizing the game. Previously if I went to desk top with the game running everything worked dead slow. Opening a word document or going to web sites and loading other pages from a web site like the forums. When I came back in the game the game worked instantly.
Now when I go to a document / email / web sites / spell checker on forum they work instantly

as though the game isn't using all my CPU power. However, when I come back in the game now, it's basically black and white. Can take 3 to 4 minutes to fully load textures and colours. I've found if I look up to the sun where I would usually get the highest fps the game loads in quicker. Haven't tried firing guns as others have mentioned but I'll give it a go.
I prefer it this way actually. Freakin hated waiting for pages to load. Now I can get things done as though the game isn't running. It's a small inconvenience to wait for textures and colours to load back in and saves me lots of time at the deck top. Just saying what the difference is after updates
