I have this problem too , when i playa about 30-40 minutes it crashed Error says : The memory could not be written or read .... Now i reinstalling the game so i will see ... My PC Specs : Intel Core i5 4460 3.2 GHz, Gainward GTX 770 Golden Sample 1176 MHz , 8 GB RAM

I think my friend can got about 30 FPS , i have about 50/80 FPS , i really don´t know how to solve the problem. :(

I want to upload the video today so you can look at it i think i will be about 11:00 am . :)

He had previously set sprint button to shift, so we changed it to 2xW, but it did not work, or do I attach a short video?
Oh, and if runs and if so slippery and takes him back, but it just looks that way