Graphics problems

[Enforcer-J]

Seems my graphics are playing up when theres a bit going on around the track and on the horizon, so tracks like pike peak and anything with decent elevation changes are undriveable after half a minute. Is this a similar problem that other tracks have had with sky textures? Or is it a vid card issue? Piccys below..

Hop into the car at pikes peak and I get this...




then a bit down the road....