What's your idle power consumption?

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The power supply on my ancient server just bit the bullet, so I'm using it as an exuse to start from afresh.


The server is mainly used for Plex, NAS and home automation, so well need to be available 24/7. However I don't want to break the bank in running costs, so am looking for a build that will maybe idle around 40W.


I'm finding it hard to find decent idle power consumption for various systems, so my question is:


What CPU and components are you rocking, and what is your idle/average power consumption?

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I idle at 65 watts, but that's with two drives always spun up, a parity drive and a torrent/download drive, and 13 more on standby. I also have two drive controllers, a Dell Perc H310 and a Supermicro AOC-SASLP-MV8. Each of these draws around 10 watts on its own I've noticed.


System specs:

M/B: ASRockRack E3C246D4U
CPU: Intel® Xeon® E-2288G CPU @ 3.70GHz
Memory: 32 GiB DDR4 Single-bit ECC

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1 hour ago, Tom3 said:

Using a Xeon D-1541 (8 core / 16 thread) 2.1 GHz, motherboard is Supermicro X10SDV-TLN4F.

Idle power runs between 21 and 25 watts.  32G ECC RAM, NVMe Cache.  







Wow, that's really nice. So if I look somewhere around the 50W TDP mark I could expect something sub 30W on idle

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6 hours ago, teedub said:

Wow, that's really nice. So if I look somewhere around the 50W TDP mark I could expect something sub 30W on idle

I haven't been following the discussion, but idle and TDP really have nothing to do with each other. TDP is a design spec that determines how much heat sink mass, airflow and overall heat rejection must be accounted for.


Two processors from the same die family, one with limited TDP, both will idle at nearly identical power. The difference at full load will be significant, with the low power model throttled back to reduce the amount of work done so it doesn't need as much cooling. However, it will take much longer to complete the same task. During that time, the rest of the system will still be running at full power, so the net effect is that a low TDP processor may actually take more power over the long term with the tradeoff being much lower peak draw.


Laptops are a good candidate for low TDP, servers, not so much.

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System specs:

M/B: Gigabyte H370M DS3H

CPU: Intel Pentium Gold G5400

Memory: 16 GiB DDR4

Storage: 8x HDD, 2xSSD (Cache)
Expansions: InLine 18419 SATA-Controller, Asus XG-C100C 10G


All HDD running: 74-84W

All HDD down (normal status): 40-50W


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I think I win... or lose... overnight "idle" low is about 217 watts. But it's never really at idle.That includes:


2 8 core processors (32 threads)

128 GB ram

5 disk main array in various states of spun up and down

7 disk backup pool spun down

2 SSD cache up

4 SSD pool up

1 vm running with 2 rx580's


and some various dockers contributing to a few watts here and there.




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System specs:

M/B: Asus Z170-A

CPU: Intel Core i7 7700

Memory: 16 GiB DDR4

Storage: 5x HDD, 1xSSD (Cache)
Expansions: Dell H310


Parity check: 78-82W

All HDDs spun down: approx. 50W

S3 sleep (roughly 67% of the time, but can often stretch to 2-3 days): 16W (not sure how accurate my power meter is for sleep. I think it should be less)


Don't use any dockers or VMs which need to be on 24/7. Via WOL, server wakes up and is ready to stream in about 20 seconds or so, which is good enough for me (my old N54L, which does not support S3, was closer to 3 minutes). Due to frequent power outages I have battery backup for the house, so every watt saved helps to extend battery life. To save more power I really should shut down the server more often, but it would take longer to start up and the drives would spin up on every start up (they remain idle when server resumes from sleep).


Using a NUC to evaluate Home Assistant. Would probably keep using that (or similar) for home automation.


@Morrtin thanks for your nice format.

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  • 2 weeks later...

System details :


Model: Custom

M/B: ASRock B450 Gaming-ITX/ac Version - s/n: M80-D5009300599

BIOS: American Megatrends Inc. Version P1.70. Dated: 12/17/2018

CPU: AMD Ryzen 7 2700X Eight-Core @ 3700 MHz

HVM: Enabled

IOMMU: Enabled

Cache: 768 KiB, 4096 KiB, 16384 KiB

Memory: 32 GiB DDR4 (max. installable capacity 256 GiB)

Network: bond0: fault-tolerance (active-backup), mtu 1500
 eth0: 1000 Mbps, full duplex, mtu 1500

Kernel: Linux 5.8.13-Unraid x86_64

OpenSSL: 1.1.1h


GPU: Nvidia QUADRO P2200


Storage: Array of 2xSSD ATA A400 KINGSTON 480Gb, Cache 1xSSD NVME A2000 KINGSTON


My UPS show idle at 67 Watts, but there's also an ubiquiti 5-Port TOUGHSwitch PoE on the same UPS (this switch deliver power to two other switches via POE), so i think my idle is less...


i adjusted the RYZEN TDP to 35 Watts in the bios, and i'm using a script to enable nvidia persistence mode, it may help to reduce consumption...

Edited by doobyns
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S3-Sleep .... 4W
Boot (peak 2sek) .... 220W
No-Load all HDDs OFF .... 49W
Full-Load all HDDs OFF .... 88W
No-Load all HDDs ON .... 93W
Full-Load all HDDs ON .... 131W
Parity-Check .... ~ 120W
Transcoding 1x 720p .... ~ 65W
Transcoding 2x 720p .... ~ 80W

Edited by Zonediver
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  • 2 months later...


I used to have a Dell 3050 micro i3 7100T with SSD and 20gb of ram as a server.


12w at idle.


it's fast (at least for my needs), cheap if used, gigabit ethernet, 6 usb 3.0, ultra small, cool

now a changed for a ryzen 3600 (I regreted with 60w+ at idle and not noticing signifcant performance except for videogames).


the only downside is it's crappy UHD 630 graphics, maybe a problem with plex

Edited by Groy
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