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3900X Temperature variations

Question asked by zmorrr on Jul 8, 2020

I have just pick up my new workstation:

AMD Ryzen 9 3900X AM4. with SilentiumPC Navis EVO ARGB 240 AIO.
Gigabyte X570 AORUS ELITE AM4.
G.Skill Aegis DDR4 32GB (2x16GB) 3200MHz CL16 XMP2 F4-3200C16D-32GIS.

Gigabyte GeForce RTX 2070 SUPER Winforce OC 8GB 

Samsung SSD 970 EVO Plus MZ-V7S500BW 500GB.

Seasonic FOCUS GX-750 80Plus Gold 750W.

The problem is that CPU temperature in any conditions (from idle to 100% load) looks like a electrocardiography 

Please have a look on the attached. There is only Windows, no other programs. (except OCCT / other).

Bios updated, same story with drivers/ without them.
It cause the fan speed  floating.

Workstation supplier after tests said that it is normal for AMD o_0

could you please help?

 

 

EDIT:

I have climed the computer and after one month (sic) I have it back with no changes. (the main board was damaged during transport, I have new one and the situation is the same. They also told me that they replaced the CPU for different piece and it was the same)

What I have found is that Ryzen Master see no temperature fluctuations, but the mainboard is seeing it and that causes the CPU fan variations. OCCT also see the variations 

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