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

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[-] MentalEdge@ani.social 64 points 1 month ago* (last edited 1 month ago)

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.

[-] fool@programming.dev 23 points 1 month ago* (last edited 1 month ago)

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

[-] catloaf@lemm.ee 7 points 1 month ago

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

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[-] muntedcrocodile@lemm.ee 4 points 1 month ago

kWh is the stupidest unit ever. kWh = 1000J/s * 6060s = 3.610^6J so 0.1kWh = 360kJ

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[-] Mubelotix@jlai.lu 38 points 1 month ago* (last edited 1 month ago)

kWh is a unit of energy, not power

[-] overload@sopuli.xyz 4 points 1 month ago

I was really confused by that and that the decided units weren't just in W (0.1 kW is pretty weird even)

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[-] elmicha@feddit.org 30 points 1 month ago

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

My N100 server needs about 11W.

[-] chunkystyles@sopuli.xyz 5 points 1 month 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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[-] Ulrich@feddit.org 26 points 1 month ago* (last edited 1 month ago)

0.1kWh per hour? Day? Month?

What's in your system?

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[-] acockworkorange@mander.xyz 24 points 1 month ago

Idles at around 24W. It’s amazing that your server only needs .1kWh once and keeps on working. You should get some physicists to take a look at it, you might just have found perpetual motion.

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[-] Joelk111@lemmy.world 21 points 1 month ago

Mate, kWh is a measure of electricity volume, like gallons is to liquid. Also, 100 watt hours would be a much more sensical way to say the same thing. What you've said in the title is like saying your server uses 1 gallon of water. It's meaningless without a unit of time. Watts is a measure of current flow (pun intended), similar to a measurement like gallons per minute.

For example, if your server uses 100 watts for an hour it has used 100 watt hours of electricity. If your server uses 100 watts for 100 hours it has used 10000 watts of electricity, aka 10kwh.

My NAS uses about 60 watts at idle, and near 100w when it's working on something. I use an old laptop for a plex server, it probably uses like 50 watts at idle and like 150 or 200 when streaming a 4k movie, I haven't checked tbh. I did just acquire a BEEFY network switch that's going to use 120 watts 24/7 though, so that'll hurt the pocket book for sure. Soon all of my servers should be in the same place, with that network switch, so I'll know exactly how much power it's using.

[-] walden@sub.wetshaving.social 9 points 1 month ago* (last edited 1 month ago)

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.

[-] GravitySpoiled@lemmy.ml 4 points 1 month 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.

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[-] computergeek125@lemmy.world 9 points 1 month ago

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

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[-] qaz@lemmy.world 7 points 1 month ago

17W for an N100 system with 4 HDD's

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[-] KarnaSubarna@lemmy.ml 7 points 1 month ago

I came here to tell my tiny Raspberry pi 4 consumes ~10 watt, But then after noticing the home server setup of some people and the associated power consumption, I feel like a child in a crowd of adults 😀

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[-] mesamunefire@lemmy.world 6 points 1 month ago* (last edited 1 month ago)

I think at max 200w? It runs a collection of fedi/self service stuff.

I also run a pi with a couple of apps on a pi 3 that sips power.

It's a legitimate issue because it's 50+ cents per killowat hour where I live so power is very expensive...

[-] Fubarberry@sopuli.xyz 6 points 1 month ago

That seems really high, I think power where I live is about 12-14 cents per kilowatt hour. What makes it so expenses where you live?

[-] mesamunefire@lemmy.world 7 points 1 month ago* (last edited 1 month ago)

Mostly just that they can. It's more expensive per tier actually.

https://www.pge.com/assets/pge/docs/account/rate-plans/residential-electric-rate-plan-pricing.pdf

Take a look, this is the old pricing. They just voted to up it again.

There's legislation that is moving along to charge people with solar because...idk.

[-] Imacat@lemmy.dbzer0.com 5 points 1 month ago

They’re charging for solar because PGE is a greedy fuck.

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[-] bobs_monkey@lemm.ee 3 points 1 month ago

Damn, I wish ours was that cheap. We're roughly $.30/kwh, mostly because our local poco is a reseller of SCE and we're in a rural area.

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[-] ShellMonkey@lemmy.socdojo.com 6 points 1 month ago

About 700 watts, it makes for a decent space heater in the winter.

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[-] meldrik@lemmy.wtf 5 points 1 month ago

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

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[-] calamityjanitor@lemmy.world 5 points 1 month ago

My 10 year old ITX NAS build with 4 HDDs used 40W at idle. Just upgraded to an Aoostart WTR Pro with the same 4 HDDs, uses 28W at idle. My power bill currently averages around US$0.13/kWh.

[-] daniskarma@lemmy.dbzer0.com 5 points 1 month ago* (last edited 1 month 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.

[-] Ebby@lemmy.ssba.com 4 points 1 month ago

There are some really efficient systems out there, but power requirements depend a lot on what is run.

A simple website is very different that a photo gallery running content ID for example.

[-] cmnybo@discuss.tchncs.de 4 points 1 month ago

My server with 8 hard drives uses about 60 watts and goes up to around 80 under heavy load. The firewall, switch, access points and modem use another 50-60 watts.

I really need upgrade my server and firewall to something about 10 years newer, it would reduce my power consumption quite a bit and I would have a lot more runtime on UPS.

[-] mtoboggan@feddit.org 4 points 1 month ago* (last edited 1 month ago)

Idle: 30 Watts

Starting all docker containers after reboot: 140 Watts

It needs around 28 kWh per month.

[-] bier@lemmy.blahaj.zone 4 points 1 month 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 😭

[-] Lemmchen@feddit.org 4 points 1 month ago

I'm idling at 120W with eight drives, but I'm currently looking into how to lower it.

[-] corroded@lemmy.world 3 points 1 month ago

For two servers (one with a lot of spinning rust), two switches, and a few other miscellaneous network appliances. My server rack averages around 600-650W. During periods of high demand (nightly backups, for instance), that can peak at around 750W.

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this post was submitted on 25 Dec 2024
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