Laptops How do I calculate how much energy laptop will consume if run 24x7 ?

[t3chg33k]

Do things like connected USB HDD (4TB OR 2TB) cause the watt usage to spike up? I guess yes. And PLEX server while not actually being used may consume less watts but if streaming starts, I guess more watts may be used.

Assuming you are using a portable 2.5" 5400 RPM drive, it will consume about half watt in idle and 3W during load, so power spikes in a factor of 6 under load. Transcoding takes the most power on any media server, so if you are not doing so, then power consumption will be quite less for simply hosting the content.

 

[raksrules]

Yes, they do.. but only when in use as they will spin down after usage.
What gen/ type is your laptop? I can give you ballpark estimates on the basis of that

Lenovo Flex, 14.0", AMD Ryzen™ 7 2700U Processor (2.2GHz, up to 3.80GHz with Max Boost, 4MB Cache), 16 GB DDR4 2400MHz, 256GB Solid State Drive PCIe, Win 10 Home 64

There is no screen anymore.

 

[Marcus Fenix]

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This is a 3500U powered laptop but check the power draw.

Now even if I assume the 2700U draws more power (which I guess it won't by a large margin as TDP is same for both and AMD doesn't piss on the TDP value unlike Intel) it would be at max 12-13W.

Assuming a median of 9W it comes out to 6.5KW per month.

Now since this machine will only operate as a seedbox the price of a Kill-A-Watt meter will be more than the electricity bill before the laptop dies.

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I saw a delta of 100 bucks between 440 and 450 units for Mumbai and Tata Power.

Don't spend so much time thinking on a ~10 watt use case. Use the laptop for seeding for one month,check the bill amount and then decide the next step.

 

[vivek.krishnan]

How do I calculate how much energy laptop will consume if run 24x7 ? I know the question is subjective and people may say it depends on what activity is happening, is it laptop idle or running high end game. But still is there a way to know?
Mine is a Lenovo Laptop and does not have a screen so my intention is to keep it running and remote (teamviewer) via another laptop when I want to do something.
My laptop is having charger of 65W if that helps.

I want to then calculate how much may be running cost if I go this route.

Assuming this is the same query you put on WhatsApp

65W will be the output power of the adaptor. Assuming its 90% efficient expect the input power to be 10% more

Your screen should take up nearly 33% of the power budget. This is a rough estimate, depends on the screen, but I think this is a pretty good estimate. If not, change figures accordingly.

A small amount of power would be lost in the convertors for different power ie 19.5V to 12V/5V/3.3V etc so take 5% there.

If the system is idling, expect another 10W of savings. But for our consideration lets assume its 75% always on load

So for a 65W laptop ~ 44W used per hour ~ I would say 1 unit a day. This is assuming you have a expensive power budget CPU which takes 15-25W.

 

[cute.bandar]

Do things like connected USB HDD (4TB OR 2TB) cause the watt usage to spike up? I guess yes. And PLEX server while not actually being used may consume less watts but if streaming starts, I guess more watts may be used.

USB HDD might consume 2W . Max draw of usb 2 port is 500ma - 2.5
I would be more worried about thermals.

 

[superczar]

Lenovo Flex, 14.0", AMD Ryzen™ 7 2700U Processor (2.2GHz, up to 3.80GHz with Max Boost, 4MB Cache), 16 GB DDR4 2400MHz, 256GB Solid State Drive PCIe, Win 10 Home 64

There is no screen anymore.

Expect an idle draw of 5-6W and peak of 20-25 . Average of around 10-16 (depending on loading levels) with a wall draw of 12-20W.

The peak will be obviously much higher if the battery is also charging - but I assume that will never be the case as you arent going to unplug it ever.

If you add a USB HDD, add another 1-4W depending on whether 2.5/3.5 and also how often it is spun up
(OTOH, if its always spinning e.g seeding a file from said HDD and its a 3.5W then the avg will go up by 7-9W)