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I wonder if my system is good or bad. My server needs 0.1kWh.

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[–] [email protected] 2 points 22 hours ago* (last edited 18 hours ago)

Pulling around 200W on average.

  • 100W for the server. Xeon E3-1231v3 with 8 spinning disks + HBA, couple of sata SSD’s
  • ~80W for the unifi PoE 48 Pro switch. Most of this is PoE power for half a dozen cameras, downstream switches and AP’s, and a couple of raspberry pi’s
  • ~20W for protectli vault running Opnsense
  • Total usage measured via Eaton UPS
  • Subsidised during the day with solar power (Enphase)
  • Tracked in home assistant
[–] [email protected] 6 points 1 day ago (1 children)

For the whole month of November. 60kWh. This is for all my servers and network equipment. On average, it draws around 90 watt.

[–] [email protected] 2 points 1 day ago (2 children)

How you measuring this? Looks very neat.

[–] [email protected] 2 points 22 hours ago

Looks like home assistant

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[–] [email protected] 2 points 1 day ago (2 children)

My home rack draws around 3.5kW steady-state, but it also has more than 200 spinning disks

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[–] [email protected] 10 points 1 day ago (1 children)

My server rack has

  • 3x Dell R730
  • 1x Dell R720
  • 2x Cisco Catalyst 3750x (IP Routing license)
  • 2x Netgear M4300-12x12f
  • 1x Unifi USW-48-Pro
  • 1x USW-Agg
  • 3x Framework 11th Gen (future cluster)
  • 1x Protectli FE4B

All together that draws.... 0.1 kWh.... in 0.327s.

In real time terms, measured at the UPS, I have a running stable state load of 900-1100w depending on what I have at load. I call it my computationally efficient space heater because it generates more heat than is required for my apartment in winter except for the coldest of days. It has a dedicated 120v 15A circuit

[–] [email protected] 1 points 23 hours ago (4 children)

Good lord, how much does electricity cost where you are? Combined with the air conditioning to keep the space livable, that would be prohibitively expensive for me

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[–] [email protected] 66 points 2 days ago* (last edited 2 days ago) (3 children)

You might have your units confused.

0.1kWh over how much time? Per day? Per hour? Per week?

Watthours refer to total power used to do something, from a starting point to an ending point. It makes no sense to say that a device needs a certain amount of Wh, unless you're talking about something like charging a battery to full.

Power being used by a device, (like a computer) is just watts.

Think of the difference between speed and distance. Watts is how fast power is being used, watt-hours is how much has been used, or will be used.

If you have a 500 watt PC, for example, it uses 500Wh, per hour. Or 12kWh in a day.

[–] [email protected] 28 points 2 days ago* (last edited 1 day ago) (2 children)

I forgive 'em cuz watt hours are a disgusting unit in general

idea what unit
speed change in position over time meters per second m/s
acceleration change in speed over time meters per second, per second m/s/s=m/s²
force acceleration applied to each of unit of mass kg * m/s²
work acceleration applied along a distance, which transfers energy kg * m/s² * m = kg * m²/s²
power work over time kg * m² / s³
energy expenditure power level during units of time (kg * m² / s³) * s = kg * m²/s²

Work over time, × time, is just work! kWh are just joules (J) with extra steps! Screw kWh, I will die on this hill!!! Raaah

[–] [email protected] 8 points 1 day ago

Could be worse, could be BTU. And some people still use tons (of heating/cooling).

[–] [email protected] 2 points 1 day ago* (last edited 1 day ago) (1 children)

Power over time could be interpreted as power/time. Power x time isn’t power, it’s energy (=== work). But otherwise I’m with you. Joules or gtfo.

[–] [email protected] 2 points 1 day ago* (last edited 1 day ago)

Whoops, typo! Fixed c:

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[–] [email protected] 26 points 1 day ago* (last edited 1 day ago) (8 children)

0.1kWh per hour? Day? Month?

What's in your system?

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[–] [email protected] 8 points 1 day ago (2 children)

17W for an N100 system with 4 HDD's

[–] [email protected] 2 points 1 day ago (1 children)

That's pretty low with 4 HDD's. One of my servers use 30 watts. Half of that is from the 2 HDD's in it.

[–] [email protected] 5 points 1 day ago

@meldrik @qaz I've got a bunch of older, smaller drives, and as they fail I'm slowly transitioning to much more efficient (and larger) HGST helium drives. I don't have measurements, but anecdotally a dual-drive USB dock with crappy 1.5A power adapter (so 18W) couldn't handle spinning up two older drives but could handle two HGST drives.

[–] [email protected] 3 points 1 day ago (1 children)

Which HDDs? That’s really good.

[–] [email protected] 3 points 1 day ago* (last edited 1 day ago)

Seagate Ironwolf "ST4000VN006"

I do have some issues with read speeds but that's probably networking related or due to using RAID5.

[–] [email protected] 30 points 2 days ago (12 children)

Do you mean 0.1kWh per hour, so 0.1kW or 100W?

My N100 server needs about 11W.

[–] [email protected] 5 points 1 day ago

The N100 is such a little powerhouse and I'm sad they haven't managed to produce anything better. All of the "upgrades" are either just not enough of an upgrade for the money, it just more power hungry.

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[–] [email protected] 2 points 1 day ago

I use unraid with 5950x and it wouldn't stop crashing until I disabled c states

So that plus 18 hdds and 2 ssds it sits at 200watts 24/7

[–] [email protected] 3 points 1 day ago* (last edited 1 day ago)

Running an old 7th gen Intel, It has a 2070 and a 1080 in it, six mechanical hard drives 3 SSDs. Then I have an eighth gen laptop with a 1070 TI mobile. But the laptop's a camera server so it's always running balls to the wall. Running a unified dream machine pro, 24 port poe, 16 port poe and an 8 port poe

Because of the overall workload and the age of the CPU, it burns about 360 watts continuous.

I can save a few watts by putting the discs to sleep, But I'm in the camp where the spin up and spin down of the discs cost more wear than continuous running.

Edit: cleaned up the slaughter from the dictation, after I cleaned up my physical space from Christmas festivities.

[–] [email protected] 5 points 1 day ago* (last edited 1 day ago)

Around 18-20 Watts on idle. It can go up to about 40 W at 100% load.

I have a Intel N100, I'm really happy about performance per watt, to be honest.

[–] [email protected] 4 points 1 day ago

My whole setup including 2 PIs and one fully speced out AM4 system with 100TB of drives a Intel Arc and 4x 32gb ecc ram uses between 280W - 420W I live in Germany and pay 25ct per KWh and my whole apartment uses 600w at any given time and approximately 15kwh per day 😭

[–] [email protected] 9 points 2 days ago* (last edited 2 days ago) (2 children)

9 spinning disks and a couple SSD's - Right around 190 watts, but that also includes my router and 3 PoE WiFi AP's. PoE consumption is reported as 20 watts, and the router should use about 10 watts, so I think the server is about 160 watts.

Electricity here is pretty expensive, about $.33 per kWh, so by my math I'm spending $38/month on this stuff. If I didn't have lots of digital media it'd be worth it to get a VPS probably. $38/month is still cheaper than Netflix, HBO, and all the other junk I'd have to subscribe to.

[–] [email protected] 2 points 1 day ago

Same here. 300w with 12 disks, switches, and router. But electricity only costs $.12/kwh. I wouldn’t trust having terabytes of data in the cloud.

[–] [email protected] 4 points 1 day ago

That's true. And the children of my family see no ads which is priceless. Yet I am looking into ways to cut costs in half by using an additional lower powered mini pc which is always on and the main computer only running in the evening - maybe.

[–] [email protected] 2 points 1 day ago

50W-ish idle? Ryzen 1700, 2 HDDs, and a GTX 750ti. My next upgrade will hopefully cut this in half.

[–] [email protected] 5 points 1 day ago* (last edited 1 day ago) (2 children)

last I checked with a kill-a-watt I was drawing an average of 2.5kWh after a week of monitoring my whole rack. that was about three years ago and the following was running in my rack.

  • r610 dual 1kw PSU
  • homebuilt server Gigabyte 750w PSU
  • homebuilt Asus gaming rig 650w PSU
  • homebuilt Asus retro(xp) gaming/testing rig 350w PSU
  • HP laptop as dev env/warmsite ~ 200w PSU
  • Amcrest NVR 80w (I guess?)
  • HP T610 65w PSU
  • Terramaster F5-422 90w PSU
  • TP-Link TL-SG2424P 180w PSU
  • Brocade ICX6610-48P-E dual dual 1kw PSU
  • Misc routers, rpis, poe aps, modems(cable & 5G) ~ 700w combined (cameras not included, brocade powers them directly)

I also have two battery systems split between high priority and low priority infrastructure.

[–] [email protected] 5 points 1 day ago (1 children)

Ugh, I need to get off my ass and install a rack and some fiber drops to finalize my network buildout.

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[–] [email protected] 2 points 1 day ago (1 children)

I was drawing an average of 2.5kWh after a week of monitoring my whole rack

That doesn't seem right; that's only ~18W. Each one of those systems alone will exceed that at idle running 24/7. I'd expect 1-2 orders of magnitude more.

[–] [email protected] 1 points 23 hours ago (1 children)

IDK, after a week of runtime it told me 2.5kwh average. could be average per hour?

Highest power bill I ever saw was summer of 2022. $1800. temps outside were into to 110-120 range and was the hottest ever here.

maybe I'll hook it back up, but I've got different (newer) hardware now.

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