I had the latest Nvidia 301.42 drivers and was getting massive stuttering and slo-mo. I went back to 301.24 beta and it's all gone. Runs like butter! Hope this helps someone out there.
Reboots have taken care of the problem for me. Once after installing the new graphics drivers while running build 69, and once after installing build 85-- GTX 560Ti
I haven't seen any stuttering with the 301.42 or any of the previous beta's when using a GTX 580. The GTX 680 is a different story with v-sync enabled though, stutter city with everything not just rFactor 2.
301.42 drivers seem to have a 3D clock bug on certain cards where the core clock never goes above 50Mhz even when running 3D games.
I had the SLO MOTION issue . I am on 680 and new drivers.. To make them go away, I have no idea what I did sadly.. Ya know how it is when you make a zillion adjustments and reboot.. But I am on current drivers and all is well now..
I have the Slo-Mo / stuttering issue but can't get rid of it whatever I try! Did a clean install of RF2 this morning, tried clean installs of both 301.24 and 301.42 drivers but none of this has helped. The strange thing is at first I was only getting stuttering running on triples so I switched to a single gpu and single screen and this eliminated it for a few races. Now it doesn't matter what combination of screens/GPUs I use, the sim stutters like hell!! I'm at a real loss here...
I had the same problem with a GTX560 with 301.42. For this issue I have uninstalled the driver, cleaned the pc with a software, Driver Cleaner Pro, reinstalled again the 301.42 and now rF2 runs very smooth!
There is a serious 3D clock bug in many of the 301.xx drivers. I've been reading reports on many forums about it. Right now I'm using 302.59 developer drivers which are confirmed not to have that bug.
