I bought a new Z2 Mini G4 recenntly which is currently running Ubuntu 18.10 and I realize the PCH temperature is rather high (around 80 C- 90 C) even after I have updated to the latest BIOS (Version: Q50 Ver. 01.01.08, Firwmware Revision 7.180).
When the load is low/close to idle, the CPU temperature is around 45 C, GPU temperature around 50 C but the PCH Temperature is around 90 C. Despite the PCH temperature is at 90C, the fan seems to be running at low speed.
pch_cannonlake-virtual-0
Adapter: Virtual device
temp1: +91.0°C
acpitz-virtual-0
Adapter: Virtual device
temp1: +30.0°C
iwlwifi-virtual-0
Adapter: Virtual device
temp1: N/A
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +44.0°C (high = +80.0°C, crit = +100.0°C)
Core 0: +42.0°C (high = +80.0°C, crit = +100.0°C)
Core 1: +43.0°C (high = +80.0°C, crit = +100.0°C)
Core 2: +42.0°C (high = +80.0°C, crit = +100.0°C)
Core 3: +44.0°C (high = +80.0°C, crit = +100.0°C)
Core 4: +44.0°C (high = +80.0°C, crit = +100.0°C)
Core 5: +42.0°C (high = +80.0°C, crit = +100.0°C)
The motherboard used is HP 8458 but I didn't manage to find any product specification online. The motherboard seems to be based on Intel's C246 Chipset? Considering the tightly packed components in the chassis, the temperature could be running higher than other normal desktops but is the PCH temperature around 90C in the normal operating range when idle/low usage?
However, when I stress load the CPU to 100%, the CPU temperature increases to the range of 85C - 90C and with the fan speen ramped up, the PCH temperature droped to 70C - 80C. It appears to me that the fan controller doen't take into account of the PCH temperature?
Appreciate if someone could help clarify if this is an expected behavior for the Z2 Mini G4. Thanks!