My home rack draws around 3.5kW steady-state, but it also has more than 200 spinning disks
this post was submitted on 25 Dec 2024
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For the whole month of November. 60kWh. This is for all my servers and network equipment. On average, it draws around 90 watt.
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
kWh is a unit of energy, not power
Wasn't it stated for the usage during November? 60kWh for november. Seems logic to me.
Edit: forget it, he's saying his server needs 0.1kWh which is bonkers ofc
Only one person here has posted its usage for November. The OP has not talked about November or any timeframe.
I was really confused by that and that the decided units weren't just in W (0.1 kW is pretty weird even)
Wh shouldn't even exist tbh, we should use Joules, less confusing
At least in the US, the electric company charges in kWh, computer parts are advertised in terms of watts, and batteries tend to be in amp hours, which is easy to convert to watt hours.
Joules just overcomplicates things.
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.
.1kWh is 100Wh
Good point. Now it does make sense. I know the secret to the perpetual motion machine now.
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.
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
50W-ish idle? Ryzen 1700, 2 HDDs, and a GTX 750ti. My next upgrade will hopefully cut this in half.
17W for an N100 system with 4 HDD's
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.
@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.
Which HDDs? That’s really good.
Seagate Ironwolf "ST4000VN006"
I do have some issues with read speeds but that's probably networking related or due to using RAID5.
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.
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 😭
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.
If you have a 500 watt PC, for example, it uses 500Wh, per hour. Or 12kWh in a day.
A maximum of 500 watts. Fortunately your PC doesn't actually max out your PSU or your system would crash.
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
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.
Whoops, typo! Fixed c:
Could be worse, could be BTU. And some people still use tons (of heating/cooling).
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Do you mean 0.1kWh per hour, so 0.1kW or 100W?
My N100 server needs about 11W.
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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.
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.
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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