How to watch 4k HEVC on these machines?

>>105671708
I see, so BIOS/hardware set the lower/upper limit, and the kernel uses what it has?
This is what cpupower show
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
energy performance preference: balance_performance
hardware limits: 800 MHz - 3.10 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 800 MHz and 3.10 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: 2.70 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
>>105671796
I understood nothing of that.