Check max cpu clock speed in linux

I have seen this question multiple times but no answer to the point.

I am on Ubuntu 20.04, CPU is R9 5950x.

All I want is a stress test where it shows the max clock speed (in MHz) and what a single core or all cores went up to.

Is it available in Linux?

I don't think sysbench or stress-ng provides that.

I am not asking this for peace of mind. I am an academic coder and I am not satisfied with the single core or multi core performance.

With lscpu I never found the clock speed going above 4.7 GHz on single core load and all core speed never goes above 3.8 GHz.

I have to determine if my CPU or the cooling is faulty.

Thanks in advance.

1 Answer

That is something the BIOS will tell your so anything related to that should be available from the dmidecode tool. Example, filtering on "Max" tells me mine are capped at 2000MHz:

$ sudo dmidecode | grep Max Max Speed: 2000 MHz Max Speed: 2000 MHz Maximum Capacity: 13 GB

1 module shows me ...

Handle 0x1001, DMI type 4, 32 bytes
Processor Information Socket Designation: CPU 1 Type: Central Processor Family: Other Manufacturer: Google ID: F0 06 03 00 FF FB 8B 1F Version: Not Specified Voltage: Unknown External Clock: Unknown Max Speed: 2000 MHz Current Speed: 2000 MHz Status: Populated, Enabled Upgrade: Other L1 Cache Handle: Not Provided L2 Cache Handle: Not Provided L3 Cache Handle: Not Provid