Every time I play Drive I usually get a solid 43-48fps (Based on FRAPS) and that is great for me. But sometimes when i go to play i start to play with this fps and then Beam randomly starts to go into major lag mode for 10 seconds and then go back to normal for like 7-10 minutes and then does the same thing again with the 10 second major lag. It happens randomly not just when I collide with an object or anything it just randomly lags like this. Even putting all settings on Low* and running in window mode it will do this.
Check to make sure nothing is overhearing with something like hwinfo. I will also add that I have been having a similar issue. I will get random drops in frames from mid 80's on grid to low 20's. The only way to fix is to pause physics with "j" and then unpause. I haven't done anything to the game or my pc. D: