Windows 64 1920x1080, 670M 3GB. I tested with Carenado Bonanza, LES DC-3, Carenado C90, Flight models per frame is 2. Correct it freezes and I can see where the clouds seem to do a refresh. This is weird, I get freezes while doing circuits at KORF. Multiple freezes near the Atlantic Ocean. Tested it for about half an hour. Did the same thing at KILM, not one freeze. Not sure why I didn't see a big boost like the others, I wish I would have payed more attention ver 1.0, now my fps seems to be locked at 20 with Skymaxx running.