For me, Silverstone has always run well on my SLI rig -- but today I made some more significant improvements to smoothness and FPS. After some more experimenting, I have sharpened up everything even more and made it totally smooth (bit like rF1 for me).I have set the settings in the nVidia Control Panel now and it works much better. Resolution at 5760 x 1080 and with a full grid of 21 Nissan GT-R cars - plus me - I get 59FPS at the back on the grid rising to 105FPS around Becketts. These are my settings which are working a treat. So further improvement in FPS but silky smooth, sharp imagery which is important too. BTW: Filtering is at x16.