Ok so I disabled Crossfire and ran the exact same route (Memphis International to Tri-City Bristol, TN) and saw no difference in the frame rate then what I saw with Crossfire enabled. Memphis International isn't a small airport either it is a hub for United Parcel Service the Super Hub and home base for FedEX. It is the largest cargo hub by volume in the world. It is a hub for Northwest (Delta) Airlines. The sim has a high level of detail for this airport. I ran this route twice in the King Air climbing to 5000ft, of course the lowest frame rate was during taxi from the gate to the runway again at a low of 26fps and when at 5000ft in eastern Tenn you make your way thru the Blue Ridge Mountains it again hit just over 100fps. It's clear that Crossfire doesn't improve anything in FSX (we already now this) but its also clear to me that when disabled it doesn't improve performance at all. Now granted if FSX was the only sim I ran on my system I would never have bothered to run Crossfire, but it's not the only sim. It's one of five that I run, and it's the only one that doesn't take advantage of Crossfire. It's just not worth the time to open CCC and disable Crossfire for its use. Oh and I don't always fly the big aircraft, in fact my favorite is the Goose followed by the King Air & P-38 Lighting from Just Flight . My favorite big aircraft would be the C-130 from Just Flight and then the CRJ700.