Bjoern
worst developer ever
Adding to what Bjoern's comments. I was a dedicated ATI Guy myself. ATI cards, like all others had issues with driver compatibility. To my knowledge there was one individual that would re-write the drivers and make them better compatible. He seemed to be someone who enjoyed doing this because every new ATI card that was released, very soon after he would have better drivers for the cards on his website. I think he did this for the operating systems prior to Windows 7. Once the 64bit operating systems stepped in (and ATI changed hands) his development stopped.
Ah, the Omega Drivers. My 2003-ish museum PC as well as my parents' PC still run them in their respective 2006-ish versions.
I build gamer units and networks. Back in the day ATI all the way up to the 3870 were really great cards, since then nothing compares to the graphics look and speed that Nvidia gives FSX. I still fondly recall the ATI 800 series cards that ran FSX flawlessly...with a little overclocking help of course!
From what I've heard, anything from the X1xxx to the 4000 series was quite a dud.
I remember having immense trouble getting FSX to run on a 4850 (note that this was prior to the Shader 3.0 fixes), which I then traded it in for a 9800GTX+. After that, FSX ran as it should.
It's funny that even FlightGear runs better on NVidia cards...