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CPU idle power saving

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I have a setup as follows:

 

Intel Celeron G530 2.4GHz (32nm Sandy Bridge)

Gigabyte GA-Z68AP-D3 motherboard

1 x 4GB DDR3 DRAM

3 x Seagate 3TB in SHR volume

1 x Seagate 2TB in single drive volume

Corsair CS450M 80+ Gold PSU

 

The system is running Nanoboot 5.0.2.1 / DSM 5.0-4482 and runs great!

 

My only issue is power consumption. At idle it is about 60 watts. Prior to XPEnology I had a similar FreeNAS setup which was 35W at idle. I have added a couple drives in the XPEnology setup, but I think there is ~15W wasted. My guess is that CPU power saving is not enabled, and the CPU is running at full speed (and full voltage) even when idle.

 

Is there a way I can check this? I am familiar with Linux but not familiar with packages. Do I need to install or setup some package to enable CPU power saving? I assume there is something to check/enable for ACPI power states.

 

Thanks in advance!

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