Ok, I just took it apart, re-seated the cooler, swapped the noctua fan for the stock Scythe fan, and re-applied thermal paste. I also changed the orientation of the cooler.
Idling at 48c.
Here is how it was set up before:
Here is what it looks like after rotating the cooler 180 degrees...
Built mine today with a 2700x. Big Shuriken 3 isnt' cutting it thermals-wise. Have you tried putting a Noctua NH-L12S in there? It's right at 70mm so I'm afraid of it running up against the PSU.
Speaking of the PSU--fan facing up or down? Right now I have it facing up.
I have made a few changes since I made that post. I undervolt the 2700x by .0825. I also replaced the cables and rewired everything with Pslate's cabling.
I get mid-50s at idle and mid-60s-70s at load.