Hi. Its on newly updated 11.3-RELEASE system. Recently I got (quite old from 2013) Mini ITX motherboard with Celeron J1900 CPU: https://ark.intel.com/content/www/us/en/ark/products/78867/intel-celeron-processor-j1900-2m-cache-up-to-2-42-ghz.html Here is what 'system' sees. # cat /var/run/dmesg.boot|grep CPU: CPU: Intel(R) Celeron(R) CPU J1900 @ 1.99GHz (2000.05-MHz K8-class CPU) # sysctl hw.model hw.model: Intel(R) Celeron(R) CPU J1900 @ 1.99GHz # lscpu Architecture: amd64 Byte Order: Little Endian Total CPU(s): 4 Thread(s) per core: 1 Core(s) per socket: 4 Socket(s): 1 Vendor: GenuineIntel CPU family: 6 Model: 55 Model name: Intel(R) Celeron(R) CPU J1900 @ 1.99GHz Stepping: 8 L1d cache: 24K L1i cache: 32K L2 cache: 1024K Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 cflsh ds acpi mmx fxsr sse sse2 ss htt tm pbe sse3 pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline rdrnd tsc_adjust smep erms fpcsds syscall nx rdtscp lm lahf_lm The powerd(8) daemon is not able to scale frequency on it ... # /etc/rc.d/powerd onestart Starting powerd. powerd: error reading supported CPU frequencies: No error: 0 /etc/rc.d/powerd: WARNING: failed to start powerd The powermon(8) also is not able to attach to it ... # powermon CPU is unsupported ... but I am able to set different frequencies by hand with sysctl(8) command: # sysctl dev.cpu.0.freq=1200 What other information can I provide? Regards.