FYI: When I had the old cooler [before placing this new Cooler Master EVO 212 Black]I never saw this spikes.Probably an artifact or flaw in Aida64's monitoring.
Run HWInfo64 at the same time and graph CPU Die (average) temp and CPU (Tctl/Tdie) sensors and compare to those. I'd trust HWInfo first...but you also have to understand the difference between those two readouts, just hover over the sensor names and read.
P.S. I ran this test on first time placing the Cooler then I pulled it of again to check for some thermal paste leakage or if it was to little, it was okay either whey I pasted a new layer of new cooler master gold paste. And again those spikes :
Okay just done it.
Please take a look : View: https://imgur.com/a/6GcVwpf