I have that same MB, but now I have a 3700x on it.
When I had a 2600 (OC'd to 4 GHz) my EDC would regularly hit 100% when I was running benchmarks.
As long as it doesn't stay at 100 % all the time you are fine.
I have my Performance Enhancer set at level 3 OC now too and my EDC (145A) goes up to around 30 to 35% when running a Game but drops down to 3 to 5% while web browsing.
I just Ran UserBenchmark and my EDC topped out around 70%.
And when I ran Cinebench R20 Multicore it maxed out at 75%.
But I have a 3700x now and I'm sure that's why it is lower than yours.
But at idle it should still drop to 3 to 5 % or so for your CPU like it does for me.
As asked by Crosslhs82x2, knowing what BIOS you are using will help us help you.