Performance in Simulators
Radeon X1000 series cards do not support vertex texturing, so they can’t use this technology to render the water surface with the highest possible quality in this game. This is only available on Nvidia GeForce 7 GPUs.
The EN7950GT and EN7900GS Top deliver similar frame rates, but the junior model provides a higher minimum of speed in 1600x1200. Both cards allow to play the game comfortably with enabled 4x FSAA and also give you the best-looking water surface.
It’s hard to choose between the Radeon X1950 Pro and the ASUS EN7950GT in X3:
When FSAA is enabled, 1280x1024 seems to be the highest resolution to play the game with comfort on the EN7950GT and EN7900GS Top. You can also try to play it in 1600x1200 as the speed is never lower than 30fps in that resolution.