I have just purchased Real Flight 3.5 and have a similar computer to yours. I had problems with the on board graphics card not being powerful enough to display the high quality graphics of Real Flight 3.5. I have on order a 512 mb graphics card which hopefully enable me to turn back on all the graphics features.

Real flight always worked OK but did not have instant response to control inputs caused through the on board graphics card having difficulty putting the data on the screen quickly enough. I have temporarily (I hope temporally) turned off some of these features and Real Flight is now working fine, but the graphics are limited because of my limited on board graphics card. The new card will solve all these problems!!!or it better had or I will not be happy!

Cheers

David