Overheating CPU after computer restart

[Damongrey]

This has been a constant issue each time I restart my desktop. Normally everything runs fine prior to the restart, average idle temperature usually sits around 35C on the CPU and 30C on corsair's integrated sensor. After restarting the system, average idle temperature spikes to 60C while corsair reports 53C. After a couple of restarts everything seems to run just fine, although due to this becoming far more common compared to how it was before, I'm hoping someone has an idea of what may be causing this issue.

 

Computer specs are as follows:
Case: Deepcool Dukase v2
CPU: AMD Ryzen 7 1700 (Stock)
CPU Cooler: Corsair H100i v2

Case/Radiator Fans: 4 ML120 120mm fans from corsair.

Motherboard: X370 SLI PLUS
HDD: Western Digital 2TB 7200 RPM
Ram: Corsair Ballistics 2400mhz 4x4GB (16GB total)
PSU: Corsair RM750X

[Damongrey]

Just now, kwiksilver said:

Could be thermal paste. I didnt trust the pre placed thermal paste on the H100i when I got it. Wiped it off and put on my stuff. Just a thought, might be wrong

I thought the same thing the first time and replaced the thermal paste, no luck.

[Guest]

What is your pump speed when these spikes occur?

[Damongrey]

Just now, Legendarypoet said:

What is your pump speed when these spikes occur?

The pump remains at 3,000 rpm, its set to performance. The cooler itself is only 6 months old.

[Guest]

And what about CPU voltage (idle vs spike)?

[Damongrey]

6 minutes ago, Legendarypoet said:

And what about CPU voltage (idle vs spike)?

Vcore remains around 1.10v regardless.

Edited October 20, 2017 by Damongrey
Adding photo