I went with a Radeon9550. Not top of the line but works better than my GeForce 5200 with G3. Not sure why you're having the problems you are. If you have high speed access, download the heli update. There are a few fixes and two different 3D airplanes for you to practice with. The YAK 54 with 3D surfaces and throws and a CAP 232 electric 3D.