There is no setting in bios to make all cores always work at max speed (no core optimization or anything remotely related to cores), I've tried to played with all possible settings with no change. Still, under single thread load it also shows that all cores are at 4.7Ghz despite only single one is loaded: $cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq Turbostat for example correctly identifies turboboost parameters: cpu1: MSR_IA32_POWER_CTL: 0x003c005d (C1E auto-promotion: DISabled)Ĭpu1: MSR_TURBO_RATIO_LIMIT: 0x2f2f2f3030313232Ĥ7 * 100.0 = 4700.0 MHz max turbo 8 active coresĤ7 * 100.0 = 4700.0 MHz max turbo 7 active coresĤ7 * 100.0 = 4700.0 MHz max turbo 6 active coresĤ8 * 100.0 = 4800.0 MHz max turbo 5 active coresĤ8 * 100.0 = 4800.0 MHz max turbo 4 active coresĤ9 * 100.0 = 4900.0 MHz max turbo 3 active coresĥ0 * 100.0 = 5000.0 MHz max turbo 2 active coresĥ0 * 100.0 = 5000.0 MHz max turbo 1 active cores I've read that sometimes some tools doesn't report accurate frequency and in fact turbo boost may work - I've tried multitude of tools with neither reported any different (all cores maxed at 4.7 doing single thread load). (if I disable it processor speed won't rise above 3.7) I have turbo boost enabled: $ cat /sys/devices/system/cpu/intel_pstate/no_turbo I expect the core that is under 100% load should jump to 5.0ghz Sysbench -threads=1 -time=1000 -test=cpu run If I run some inherently single thread load (and can confirm that only one core being loaded), for example: I cannot make Turbo boost work for single thread loads (Which I have plenty of and boost in Ghz would be very helpful)

I have Ubuntu 19.04 with all updates installed with Intel i9 9900k processor and Asrock H370M pro4 motherboard, it's updated to the latest bios.

How to enable turbo boost on turbo 2