Power consumption numbers at idle?

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Griffon26
Posts: 6
Joined: Sat Jun 20, 2015 1:22 pm

Power consumption numbers at idle?

Post by Griffon26 »

I'm interested to see some power consumption numbers you guys get when the fitlet is idle. Just to get an idea if there are some useful kernel or other settings that I've missed.

My setup:
  • - fitlet iA10
    - 120G SSD: KINGSTON SMS200S3120G
    - APU TDP set to default in BIOS (4500)
    - ondemand cpufreq governor
    - Aggressive Link Power Management (ALPM) set to min_power
This system consumes about 6.8W at idle.

irads
Site Admin
Posts: 2364
Joined: Mon Mar 16, 2009 2:11 pm

Re: Power consumption numbers at idle?

Post by irads »

I guess that 6.8W is measured at the wall. This translates to about 5.5W DC.
It would be interesting to see what is the CPU utilization. Normally at idle the CPU consumes about 1.5W.
I think 4W shared between RAM/mSATA/WiFi/Ethernet/Audio is possible but could be probably slightly lowered (for example, you would not normally use both WiFi and Ethernet so one of them can be disabled).
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Irad Stavi
Forum admin

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Griffon26
Posts: 6
Joined: Sat Jun 20, 2015 1:22 pm

Re: Power consumption numbers at idle?

Post by Griffon26 »

irads wrote:I guess that 6.8W is measured at the wall. This translates to about 5.5W DC.
It would be interesting to see what is the CPU utilization. Normally at idle the CPU consumes about 1.5W.
It was indeed measured at the wall. The CPU is completely idle.
irads wrote:I think 4W shared between RAM/mSATA/WiFi/Ethernet/Audio is possible but could be probably slightly lowered (for example, you would not normally use both WiFi and Ethernet so one of them can be disabled).
I've been able to reduce idle power consumption a bit further.
* disconnecting TV & keyboard at boot-up -> down to 6.3W
* disabling graphics & audio in BIOS -> down to 5.8W

I have not yet figured out how to disable the WiFi. Do you have any tips on that?

And also, how do I turn the graphics back on in the BIOS? My assumption that it would turn back on automatically when I entered the BIOS setup did not pan out. I may want to use HDMI output again some time in the future. :D

P.S.: I'm loving this fitlet. You guys did a great job.

hassellbear
Posts: 106
Joined: Mon May 28, 2012 12:25 pm

Re: Power consumption numbers at idle?

Post by hassellbear »

Here is an example of my Fitlet iA10's power requirement at idle for the following conditions.

Operating System: Linux Mint v17.1 Rebecca
BIOS TDP: 4.5 Watts
USB Peripherals: Wireles keyboard/mouse adapter + USB powered speakers
SSD ALPM Setting: min_power
WiFi: Active
Bluetooth: Active
HDMI Monitor: Active
Idle.png
Idle.png (235.63 KiB) Viewed 3531 times

Best regards,

hassellbear

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