Currently I use an AMD processor so in act 2 in and 3 in places with large amounts of "fog" particles my fps drops dramatically!! there will be some way to edit the configuration of the game to lower the load of cpu(reduce particles density o something like that).
Fx 8320
gtx 970
12gb ram
*the problem is clearly of cpu since lowering the to 640 * 480 my fps still do not exceed 30 and GPU load drops to 20%.
*only happens near "fog" Ej blood island,arx.
*sorry for the bad english.