Difference between revisions of "K10ctl"

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== Introduction ==
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[[Category:Power management (English)]]
 
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[[Category:CPU (English)]]
{{Warning|USE THIS PROGRAM AT YOU OWN RISK. IT MAY DAMAGE YOUR HARDWARE.}}
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[[Category:Daemons and system services (English)]]
  
 
[http://www.ztex.de/misc/k10ctl.e.html k10ctl] allows you to overclock and undervolt an AMD K10 processor (e.g. Phenom, Phenom II) by changing its P-States.
 
[http://www.ztex.de/misc/k10ctl.e.html 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.
 
Lowering the voltage saves energy and leads to less heat and noise.
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{{Warning|USE THIS PROGRAM AT YOU OWN RISK. IT MAY DAMAGE YOUR HARDWARE.}}
  
 
== Installation ==
 
== Installation ==

Revision as of 13:59, 13 June 2011


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 YOU OWN RISK. IT MAY DAMAGE YOUR HARDWARE.

Installation

k10ctl is available in the AUR: Template:Package AUR

Configuration

Note: cpufreq must be configured properly.

k10ctl.conf

Template:File

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:

# /etc/rc.d/k10ctl start

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 Template:Filename.

Note: All arrays in the config must have the same size.


Restart k10ctl and check "k10ctl 0-3" again.

# /etc/rc.d/k10ctl start
# k10ctl 0-3

rc.conf

Add cpufreq + k10ctl to DAEMONS=() and msr to MODULES=().

Tips and tricks

Use Template:Package AUR to test the stability of your computer.

If it's stable, decrease the values, else increase them.

If your computer freezes and you can't adjust the values, start the Fallback kernel and modify the config.