When you start some intense gaming or running other large apps the then loaded cpu should see cooler temps at that point. When a Katana model HSF with a 92cm fan went on an older Socket A board the high temps when loaded wth the stock suddenly dropped from a high 61C to 39C idle. That was when the thermal pad(preformed paste) that came with the stock started giving out. With a new build like yours the idle will probably stay close for some time. It's when you start cranking things up you'll see the difference.