At least I can narrow it down to cpu. I also have a fx 6300 and considering lowering my graphics didn't help at all (I get anywhere between 40-60 fps when it doesn't lock up and kick me out)
Well after tweaking around I managed to lower my graphics to a point that isn't horribly unbearable, while also avoiding the disconnect problem. I do get a solid 60 frames constantly as well. So my suggestion is keep tweaking the graphics setting, try disabling volumetric lighting and stuff like that. I've gone 5 games of various length with no disconnect. I'll keep monitoring this thread and update with more results.
Update: it crashed again
