Yes I own the PMDG 747X, PMDG MD11X and Flight Sim Labs Concorde for FSX and they are beautiful on one monitor but try runing VC on monitor one, Locked Spot Plane on the second and instrumentation on the third and it all comes to a crawl over any city of some size. Ok, so I am running UTX, GEX, Rex 2.0 and FS Global Ultimate, the America's, and have the other 2 version's installed but turned off in the scenery library to only load when I want to fly in that area. The point is that I have the most realistic scenery I have ever had the joy of flying over and yes this is my personal pref but it is what is most important to me so I am happy to be able to take something like the 737 EVO and get great frame rates with smooth liquid flowing video via the GTX 570SC feeding monitors one and two and a GTX 285 feeding the third monitor. Video cards are in x16 and x8 slots on EVGA mobo. Video cards are non SLI and it is the best I have ever seen since the days of MSFS dos 5.0 version. I can spend the rest of my life with this and still not see all that I would like to see in this most realistic world ever seen by me. Oh by the way, I love my 46 inch Samsung LED 3D tv and 3D bluray player that is all networked together and provides direct access to internet or streaming from my i7 950. It all really kicks butt and 3d is totally awesome. The ultimate point is what works for one person may be totally different to what is required to meet your expectations. I am a retired Avionics Engineer/IT guy and have been a licensed Private Pilot since 1978. Just thought I would point out that I think I am qualified to make these observations after many years of dedication to the hobby.