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cpu-speed [2019/02/08 23:31]
cpu-speed [2017/11/11 22:47] (current)
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 +===== CPU speed =====
 + 
 +Often people choose to overclock their processors which is really only achievable from the bios or UEFI, or in Windows.
 + 
 +It has taken a long time to find the answer but when overclocking the true clock speed has never been shown in nix.
 + 
 +Often the command used which shows the various stepping speeds a processor will go through is:
 + 
 +<​code>​
 +cat /​proc/​cpuinfo
 +</​code>​
 + 
 +To strip the output down to just the speed use:
 +<​code>​
 +cat /​proc/​cpuinfo | grep -i mh
 +</​code>​
 + 
 +This is great but recently on a [[http://​ark.intel.com/​products/​75048/​Intel-Core-i5-4670K-Processor-6M-Cache-up-to-3_80-GHz|I5 4670K]] series CPU the clock speed was changed from 3.4GHZ to 4.0GHZ.
 + 
 + ​[[http://​www.microsoft.com/​|Windows]] showed the difference using [[http://​www.cpuid.com/​softwares/​cpu-z.html|CPUZ]] but Vinux did not.
 + 
 +The [[http://​www.fogproject.org/​wiki/​index.php/​Dmidecode|dmi decode]] command after quite a lot of searching shows the correct clock speed as well as other handy information like [[http://​en.wikipedia.org/​wiki/​Front-side_bus|FSB]].
 + 
 +<​code>​
 +sudo dmidecode --type Processor
 +</​code>​
 + 
 +Now the correct speed shows after overclocking.
 + 
 +Good luck
 +