My "perfect" configuration, after several tests:
- RadeonPro -> AA = 4xEQ; AA Mode = Supersample; ForceFrameRate = 30.
- FSX -> AA Off; Anisotropic ON. Frame Rate = Unlimited. Other configs in ultra. Plus AffinityMask and UsePools tweaks in fsx.cfg. FSX runs smoothly between 20, in complex sceneries and bad weather, and 30 fps in another situations. PC: AMD FX-8350@4.2GHz - Gigabyte R9 280OC WindForce/3Gb GDDR5 - 12Gb RAM DDR3 G.Skill@1600MHz