I was just stating i know the harsh difficulties your facing, even tho from different circumstances.

My experience from the stop and go game stuttering was from my antivirus in live protection mode with one particular game. Was hoping perhapse that may have been your issue but it seems not so. Another way to test if its your end, is to do a selective start up to find anything related to the cause. Annoying to do and i dont like doing that while connected to the internet. Does your benchmark stutter too by chance? Or the cinematic cutscenes?