*EDIT - If you scored around 3700 Points, and my score is 5228 Points. Do you believe that my PC is 29% faster than yours?
I hope not since that's a 41% increase in performance.
If your system was not stable running this program then it is highly unlikely that it was 100% stable at 3.6 to begin with. It may have never failed for you, but it doesn't mean it wouldn't fail running some other software. But what matters is that it's stable for you and you have no problems playing your games and using your software at 3.6. Just take this PCMark04 as a warning that some software you use in the future may be too much for 3.6 on this CPU.