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Is there any way to over/underclock or change the voltages of the AMD E-350 APU on Linux?

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Undervolt with Undervolt:

http://sourceforge.net/projects/undervolt/

Load neccessary modules:

sudo modprobe msr

Get some infos:

sudo undervolt -r

Undervolt:

sudo undervolt -p 0:0x1C,2.00 -p 1:0x2C,2.50 -p 2:0x3C,4.00

P-State:Voltage_ID,Divider

Example: "0:0x1C,2.00"

P-state "0", voltage id "0x1C", divider "2.00".

You have to experiment with the values!

The values work on my pc, but that doesn't mean they work on yours too!

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There is k10ctl which was originally build for k10 cpus but there are reports of it working with other amd cpus so could take a look and see if reads reasonable values and decide from there.

Here is a summary of overclocking tools for linux I found helpfull.

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Undervolt with AmdMsrTweaker-Lnx:

https://github.com/johkra/amdmsrtweaker-lnx

Load neccessary modules:

sudo modprobe msr
sudo modprobe cpuid

Get some infos:

sudo amdmsr

Undervolt:

sudo amdmsrt P0=16@1.2 P1=12.8@1.0 P2=8@0.8 NB_P0=0.85 NB_P1=0.8

P-State=Multiplicator@Voltage

P0, P1, P2 are the p-states of the CPU.

NB_P0, NB_P1 are the p-states of the northbridge.

Example: "P0=16@1.2"

P-state "0", multiplicator "16", voltage "1.2" volts.

You have to experiment with the values!

The values work on my pc, but that doesn't mean they work on yours too!

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Can you please explain how to use the tools in a way that answers OP's question? As it stands, this answer might be deleted as spam. – Cfinley Jun 1 '15 at 20:06

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