Home device power use: Difference between revisions
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* Assume 40W or more for laptops, idling at 10W with things dialed down | * Assume 40W or more for laptops, idling at 10W with things dialed down | ||
* 150W or more for desktops, idling at 100W (can be much less, if specialized) | * 150W or more for desktops, idling at 100W (''can'' be much less, if specialized) | ||
: counting basic monitors (larger and brighter may add | :: counting basic monitors (larger and brighter may add more) | ||
:: most gaming machines don't go over 300 or 400W when working hard | |||
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====Monitor==== | |||
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Assume that a modern LCD panel takes around 25W for a 20" screen. | |||
It can be a more, depending largely on size and brightness (a 30" might be 60W, a 40" might be 100W). | |||
In standby they tend to still use a few watts. | |||
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====Storage==== | |||
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[[Image:spinup power.png|thumb|right|211px|Three platter drives made to spin up in sequence]] | |||
Platter may take 4 to 10W while spinning (more while spinning up - assume it might be 20W) | |||
Solid state might be 3 to 5W for SSDs and NVMe in use (can be multiples higher for higher end), and can be negligible while idling. | |||
Note that for platter, a good portion of which may just be to keep it spinning, | |||
whereas SSD power use is more related to how much you use it (in particular write), | |||
and can be quite low when idle. | |||
Note that SSD isn't much more efficient than platter in active use, but ''is'' when idle. | |||
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====GPU==== | |||
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A powerful GPU working hard is probably the hungriest component you have, on par with powerful CPUs. 50 to 200W isn't crazy for a GPU. | |||
That said, a moderately powerful GPU might idle at 5 to 15W. | |||
Which is pretty decent power scaling, but still not ideal if you wanted a very power efficient system. | |||
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====Can we do better?==== | |||
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Yes. | Yes. | ||
But how much will vary. | But how much will vary. | ||
Some very informed choices can push | Some very informed choices (mostly just how idle you can make the CPU and hardware components) can push desktop down a bunch. | ||
It is no ''technical'' reason you can't | If you can accept 15..25W idle, your search becomes a little easier than if you wanted 5..10W. | ||
It is no ''technical'' reason you can't have something that can draw 300W gaming hard and 15W idle, | |||
but the ''practical'' amount of research to get that is "so you wanted another hobby to consume your life?" levels of work, | |||
and the choices will be so specific the information is not that valuable a few years later. | |||
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====CPU==== | =====CPU===== | ||
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=====Motherboard===== | |||
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'''Beefy heaters''' | '''Beefy heaters''' | ||
Electric water kettle - easily | Electric water kettle - easily 2000W | ||
: note that 2000W used 10 minutes per day is roughly the same as a 10W light thing that's on all day | |||
Under-sink water boiler | Under-sink water boiler | ||
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: but in the end little difference from the water boiler - it's just about concentrating ''when'' you're heating. The only real difference is that you don't have to isolate it against heat loss | : but in the end little difference from the water boiler - it's just about concentrating ''when'' you're heating. The only real difference is that you don't have to isolate it against heat loss | ||
(the 2kW is not a device limitation as such -- it's an assumed safety limit, because a single house socket cannot be assumed to supply more unless it's ''made'' for it and probably has a special plug) | |||
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===Water cookers=== | ===Water cookers=== | ||
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Yes, they may draw 1000 or 2000W. | |||
They will also only do so for 5 minutes, so they're sort of equivalent to running a 150W thing for an hour or a 6W thing 24/7: | |||
2000 W * 5 minutes ≈ 160 Watt-hours | |||
160 W * 1 hour ≈ 160 Watt-hours | |||
7 W * 24 hours ≈ 160 Watt-hours | |||
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Latest revision as of 16:38, 20 April 2024
Computers
tl;dr:
- Assume 40W or more for laptops, idling at 10W with things dialed down
- 150W or more for desktops, idling at 100W (can be much less, if specialized)
- counting basic monitors (larger and brighter may add more)
- most gaming machines don't go over 300 or 400W when working hard