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Questions tagged [energy]

26 questions
121
votes
5 answers

When do I need a pure sine wave UPS?

I would like to buy a rack UPS that would support all the IT related electronics in a SOHO room. This include switches, routers, PCs, servers, NAS. During my research I found out that there are different types of UPSs and the ones that generate pure…
totymedli
  • 5,324
9
votes
3 answers

Does "Reserve Battery Level" in Windows perform any function besides the popup?

In Windows 7, when a system reaches the Reserve Battery Level, does the OS perform any function(s) besides showing a popup indicating that the Reserve Battery Level has been reached? According to this source: Reserve power means programs and the OS…
Amazon Dies In Darkness
  • 9,990
7
votes
1 answer

Understanding the output of /sys/class/power_supply/BAT0/uevent

Ubuntu shows the remaining battery time on my desktop as ~2 hours. I was trying to arrive at this same value from /sys/class/power_supply/BAT0/uevent. The output of cat /sys/class/power_supply/BAT0/uevent for that instant: POWER_SUPPLY_NAME=BAT0 …
JJT
  • 181
6
votes
1 answer

Windows 10 time-controlled power settings?

Is there a way to configure Windows that it uses different energy profiles at different times? For example: Between 8:00 PM and 6:00 AM I want Windows to use the "Power saver" profile and between 6:00 AM and 8:00 PM I want Windows to use either the…
Dennis
  • 61
  • 1
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5
votes
3 answers

How much power does the Netgear WNDR3800 (N600) router consume?

I am interested in the actual (i.e., measured) power consumption of a Netgear WNDR3800 router (also known as N600 wireless dual band gigabit router) I couldn't find any reliable indication online, and deriving it from the adapter specs (12V DC @…
Rabarberski
  • 8,800
5
votes
1 answer

Prevent Windows 10 from going to sleep on lock screen

How can I prevent Windows 10 from going to sleep on the lock screen? I want the screen to stay on forever on the lock screen without moving the mouse. This would be easy to achieve if I was signed in and viewing my desktop, but that's not what I'm…
theabcpro
  • 53
4
votes
5 answers

Temporarily change energy settings without having to change my power plan in Windows 7

I'm not particularly fond of windows 7's energy management features. I think it's really cumbersome as I seem to have to change the current plan to do anything. And sometimes I don't want to change the plan - sometimes I just want to instruct the…
RoboShop
  • 3,696
3
votes
2 answers

How do I resolve the powercfg energy report errors and warnings?

I ran the following command from an elevated Command Prompt: powercfg /energy /output "c:\energy.html" The energy report has an error from Realtek and a bunch of warnings. Are all of these OK to ignore? If not, how can I resolve them? Here's a…
user1283413
3
votes
6 answers

How can I turn my laptop display off completely (while script is running)?

I want turn my laptops (Lenovo 100s) display off completely because I'm running a little script on it and I don't want waste energy. Because I run a script, it's not possible using Windows settings to turn the display off after specific time (as…
cnmesr
  • 227
2
votes
1 answer

Does the choice of CPU affect the energy budget of a commodity server farm?

How does the choice of CPU affect the energy budget of a commodity server farm? I'm wondering how much it costs per year to power the kinds of commodity servers Facebook, Twitter et al. use. Let's take one such typical server – an Intel Xeon…
Max
  • 729
2
votes
0 answers

How to monitor energy usage in processor

I'd like to monitor the energy consumption of cpu on a server. I've studied about IPMI and with it is possible monitor cpu directly at hardware. I tested some software, like powertop, but I believe that they provide estimated values of the…
Ricardo
  • 23
1
vote
3 answers

How to know how much electric power a laptop is consuming?

On a laptop charger adapter it is written '65 Watt'. When I am using that laptop plugged into an AC socket, does it mean that it consumes 65 watt per second? I think it actually depends on usage. But is the 65 watt the maximum power consumption for…
Fsalad
  • 1,207
1
vote
1 answer

lowest achievable watts for decent resolution display?

I have an unusual question. The scenario is onboard computing / entertainment for a live aboard boat with a very tight energy budget. I'm trying to figure out what is the most energy efficient display technology that is capable or pretty high…
barrymac
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  • 21
1
vote
1 answer

Deactivating sleep mode in kde plasma 5.27.6

I am using CachyOS KDE. This system is based on the arch family. I would like to know how I can disable sleep mode in the start menu and in the sddm login screen. Is there such a possibility? I would like the sleep options to disappear completely.…
BuBu
  • 23
1
vote
2 answers

Power of NVIDIA GPU out of limits (Nvidia A100)

I am executing a CUDA kernel in my A100 GPU and I've realized that the power consumption at some points is higher than nvidia-smi given range: The picture has been taken from nvtop. Is it something that I should be worry about?
Bub Espinja
  • 150
1
2