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HP Z6 G4 Workstation
Microsoft Windows 10 (64-bit)

I recently purchased a used H6 Z4 Workstation with two Xeon God 6138 CPUs. The second CPU has a CPU Riser Board Heatsink.
I noticed that the temperature of the first one varies between 104 and 113 while the second one shows much higher temperatures, between 115 and 138 (with the fan occasionally being heard) . These temperatures are measured with regular loads of a number of open Chrome pages and a few apps. All at idle, so not really processing anything.
I wonder if there should be such a difference between temperatures, on average ranging between 18- and 27-degrees F (10 to 15 degrees C). Should I go back to the shop that sold me this machine or is there something I can do myself?

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