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arch-wiki-md-repo

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All arch-wiki articles in markdown format, updated every two days.

github.com/greg-js/arch-wiki-md-repo

greg-js/arch-wiki-md-repo

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**Note:** The last release was in 2009.[[1]](https://sourceforge.net/projects/k10ctl/files/) [k10ctl](https://sourceforge.net/projects/k10ctl/) allows you to overclock and undervolt an AMD K10 processor (e.g. Phenom, Phenom II) by changing its P-States. Lowering the voltage saves energy and leads to less heat and noise. **Warning:** Use this program at your own risk. It may damage your hardware. ## Contents * [1 Installation](#Installation) * [2 Configuration](#Configuration) * [2.1 k10ctl.conf](#k10ctl.conf) * [2.2 Pre-Configuration](#Pre-Configuration) * [2.3 How to calculate values](#How_to_calculate_values) * [2.4 Enable k10ctl permanently](#Enable_k10ctl_permanently) * [3 Tips and tricks](#Tips_and_tricks) ## Installation k10ctl is available in the AUR: [k10ctl](https://aur.archlinux.org/packages/k10ctl/) ## Configuration ### k10ctl.conf `/etc/conf.d/k10ctl` ``` # For information how to calculate the following values see: # http://www.ztex.de/misc/k10ctl.e.html#c1 # Change to "true" after you configurated the settings for your CPU # WARNING: Be SURE that the following values are correct and safe for # your system before doing this! CONFIGURATED=false # Number of cores for your CPU CORES=4 # List of P-states you want to change. # NOTE: all following arrays must have the same size! PSTATES=( 0 1 2 3 ) # List of Northbridge VIDs NBVID=( 45 45 45 45 ) # List of CPU VIDs CPUVID=( 36 45 55 68 ) # List of CPU FIDs FID=( 12 5 0 0 ) # List of CPU DIDs DID=( 0 0 0 1 ) ``` ### Pre-Configuration k10ctl needs the kernel module **msr**, so run ``` # modprobe msr ``` Now you have to find out the default values of the P-States for your CPU. ``` # k10ctl 0-3 ``` 0-3 are the CPU cores so if you have less, decrease the second number. Adjust your config with the correct numbers from the output. **Tip:** The important lines are "P-State 0" - "P-State X". When you are sure everything is correct, set "CONFIGURATED" to "true" and restart k10ctl: ``` # systemctl start k10ctl ``` Up to now k10ctl should work with the default values of your CPU. ### How to calculate values Check "VID interface mode" to know how to calculate your settings. ``` # k10ctl 0-3 -> first line ``` Parallel VID interface mode: ``` if vid>=64 then U=375 mV else if vid>=32 then U=1162.5mV - vid=12.5 mV else U=1550mV - vid*25 mV ``` Serial VID interface mode: ``` if vid>=124 then U=0 mV else U=1550mV - vid*12.5 mV ``` Finally you can modify your P-States in `/etc/conf.d/k10ctl`. **Note:** All arrays in the config must have the same size. Restart k10ctl and check "k10ctl 0-3" again. ``` # systemctl start k10ctl ``` ``` # k10ctl 0-3 ``` ### Enable k10ctl permanently ``` # systemctl enable k10ctl ``` For the module 'msr' take a look at [Kernel modules#Loading](/index.php/Kernel_modules#Loading "Kernel modules"). ## Tips and tricks Use [mprime](https://aur.archlinux.org/packages/mprime/) to test the stability of your computer.