That's interesting.... you seem to be using a hybrid approach. Brian posted his HowTo a while back. Do you first install that XTU and set it with his recommendations, and thereafter install the latest stable Throttlestop and apply your recommendations for it, running both? Brian is still using W7 as is Bambi.
I'm very interested in your results with that Z440 heatsink/fan because I think it might get us close to water cooling. Brian built a custom water cooling tower and so far he seems to be the champ.