GW2 use too much CPU while minimized
GW2 is, and probably always will be, really CPU heavy. Dunno if they can change this at this point. I think it’s hardcoded into the engine.
Fury of the Departed [Fury] – http://www.furyofthedeparted.net
I don’t think it is the rendering engine. GPU load drops to 0% while minimized(from fullscreen).