So guys. I've bought r'nr' about a week ago and I've already get a gold truckler award (or a golden buffalo as it said in the news), it took me a month of the game time. FPS was about 30-40 average, sometimes 20-25 when I was passing ai trucks (2-3 seconds) and in 1 place in the game was slowing down wery bad ( route 101 between Atascadero and Greenfield).
In video options I have 1024*768 85hz (my monitor doesn't supporte more), texture filtering off, shadows off ( shadows are really poor in the game so I turned it off), 3D clouds off, view distance 4, car detailing 0, raindrops on, HDR off, Blur off (I don't like it), reflections and reflection speed 0 (there's may be some reflections on the rainy road but I haven't seen any in chrome-plated cisterns when cathing it up).
Game is awsome

but Still waiting for the patche

(just a russian paradox)
I have e4600 Core 2 Duo 2.4Ghz, 3Gb ram DDR2, 8600GT 512mb, motherboard Asus P5B-MX, Soundcard intagrated Realtec HD.
P.S. I've read a lot of russian forums and understood that if you have Core 2 and 7800GT it's almost enough for R'N'R cause better then 60FPS I haven't seen even on i7 with 2GB of video.