Last week I upgraded from a core2duo E6300 to a Sandy Bridge 2500K which I have overclocked to 4.6Ghz combined with a GTX460, 4GB DDR3.
Is amazing I haven't been able to get the FPS below 100 so far.
Post some screen shots of the scenarios I used with these pics; let’s see what Sandy Bridge is capable of overclocked -
http://forums.auran.com/trainz/showthread.php?t=58862