I spend a lot of time with this, not really getting anywhere. But I notice one thing and I do not know what it means. The pink cpu bars, I have 4 for each core. Say core 1 - there is the main bar, and there is a very thin bar under it between the main bars for cores 1/2. This thin bar under the core 1 main bar - sometimes it has this dotted line go up and down. What is that thin dotted line under each core? What does it mean? Only thing I can tell you guys is that activity with that dotted line going up on core 1 is connected to the stutters. Sometimes it goes up (even tho core 1 is still only at 60 or 70% usage) and goes away, game runs fine, sometimes though it goes up and then I quickly get the 100% CPU thing and massive race ending stutter. The 2 things go together, activity with that dotted line and the 100% CPU usage they go together.