That last push pin might be causing it absolutely. What you can do is do a load test with the cover/ door open, and put a finger on the heat sick to see if that helps temperatures go down.
Just run Prime95 on it and got 70*C spike after about 10 min.
I don't really think I can get the Scythe to install correctly on it. I can't seem to push that final pin all the way in, and I now think that this is the reason for the temps. Unfortunately, I only have this cooler and the stock one. At this point, I don't think the stock intel cooler would go this high in temps (it should be rated for safe use under full load, hopefully).
Any recommendation for the pushpin installation? As I said, I can't seem to make all 4 pins stick to the socket. I am worried if I push it harder I might damage the board...