Temps on I5 3570k with 212 Plus

So I just installed the hyper 212 plus into my new rig and I am a little confused with the temperatures. While idle in windows running real temp I am in the 30s and 40s celsius of course. This does not seem like a very big difference from stock. However, when I run intel burn test on high or standard for 10 minutes my temperatures never go above 65c. Any input on how these temps look would be greatly appreciated. Ill be keeping an eye on things for the next week or so and depending on the general concensus, I may try reinstalling the heatsink to make sure my thermal paste application is good. Thanks in advance.