Got my metal case today, isy=talled the SoC into the case.
NVMe and eMMC fit perfectly.
Also I’ve applied some thermal paste:
With thermal paste the CPU idle temp reduced from ~43°C to ~36-37°C in the same environment.
alex@rock-5b:~$ sensors
gpu_thermal-virtual-0
Adapter: Virtual device
temp1: +36.1 C
littlecore_thermal-virtual-0
Adapter: Virtual device
temp1: +37.0 C
bigcore0_thermal-virtual-0
Adapter: Virtual device
temp1: +36.1 C
tcpm_source_psy_4_0022-i2c-4-22
Adapter: rk3x-i2c
in0: 12.00 V (min = +12.00 V, max = +12.00 V)
curr1: 2.25 A (max = +2.25 A)
npu_thermal-virtual-0
Adapter: Virtual device
temp1: +36.1 C
center_thermal-virtual-0
Adapter: Virtual device
temp1: +36.1 C
bigcore1_thermal-virtual-0
Adapter: Virtual device
temp1: +37.0 C
soc_thermal-virtual-0
Adapter: Virtual device
temp1: +36.1 C (crit = +115.0 C)
As for me, the main minus is a hidden GPIO including UART pins.
UPD:
The average temperature under 100% CPUs load (Building the kernel):
Every 2.0s: sensors rock-5b: Sun Dec 4 07:55:24 2022
gpu_thermal-virtual-0
Adapter: Virtual device
temp1: +51.8 C
littlecore_thermal-virtual-0
Adapter: Virtual device
temp1: +56.4 C
bigcore0_thermal-virtual-0
Adapter: Virtual device
temp1: +58.2 C
tcpm_source_psy_4_0022-i2c-4-22
Adapter: rk3x-i2c
in0: 12.00 V (min = +12.00 V, max = +12.00 V)
curr1: 2.25 A (max = +2.25 A)
npu_thermal-virtual-0
Adapter: Virtual device
temp1: +53.6 C
center_thermal-virtual-0
Adapter: Virtual device
temp1: +52.7 C
bigcore1_thermal-virtual-0
Adapter: Virtual device
temp1: +58.2 C
soc_thermal-virtual-0
Adapter: Virtual device
temp1: +56.4 C (crit = +115.0 C)