i never wrote that i only need graphics, i have 3 22" screens coupled on a ati 5850 and the fps is not great, mainly because engine is too old, tried with Dirt2 (ok no simulation but a whole higher in gfx) and the fps is better (with 3 screens).
on lfs, on starting grid (on IHR server) my fps is under 30 wich is not good.
a repeat, i don't want better graphics, i just need dx9 only because today graphics card drivers are optimized for.
Today video card drivers are DX9 (or DX10) optimized, and DX7-8 are too old, so it will be a good thing to switch engine to full DX9. benefit will be mainly fps gain (with dual or triple monitor).