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0
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1answer
32 views

Reasons to use adaptive and energy saving power plans

This is Question and Answer topic. After many years of using laptops, desktops and servers I asked myself - why adaptive and energy saving plans exist in desktop and server computers? Why would I use ...
0
votes
1answer
383 views

How can I enable the deep RC6 sleep states on an haswell architecture?

If you use iotopyou will see three sleep states. One is called RC6 and the other two are deep sleep states called RC6p and RC6pp. I read the modinfo i915 and saw that one can enable them by passing ...
0
votes
1answer
120 views

Wireless or wired LAN: Which consumes less power?

I have a printer that has Ethernet LAN and Wi-Fi WLAN. The printer is seldom used, so I'm interested in minimizing idle power consumption. My Wi-Fi AP is on anyway, so that's not interesting. My ...
0
votes
0answers
91 views

How to switch between graphic cards on desktop

I am going to build a PC with Nvidia graphics card. The thing is, powerful cards are pretty noisy and hot, even in idle mode. So, i don't want it to work all the time. Is there a way to completely ...
0
votes
3answers
197 views

Windows 7 screen saver

We have a range of public Windows 7 computers. The computers are always on. When the users are logged on, the screen must not go off and the computer must not sleep. However, when the user ...
0
votes
3answers
575 views

How to prevent a laptop from going into sleep in Windows7 32bit in High Performance mode?

When my laptop running Win7 32bit is not used, it always goes into some kind of energy saving mode. The exact behaviour ist like this. When the computer is not use, the screen will go darker and when ...
3
votes
2answers
119 views

Does a direct scan without previewing a document save electricity?

My question is very simple and straight. I normally take a preview option while scanning a document in my scanner where sometimes I adjust its boundary and reduce the overall size of the document to ...
1
vote
1answer
90 views

Generate daily system load / uptime stats

In order to study my Mac system activities I want to visualize uptime, sleeptime and cpu average during each day. My first guess would be looking at the system logs, but I would like to know which ...
1
vote
0answers
21 views

Can I sleep one of the displays on a dual-monitor setup? [duplicate]

I want to be able to 'put the display to sleep' on one of my two monitors when it isn't needed, so it doesn't distract me or use unnecessary power. Ideally, the display would be asleep, but the OS ...
22
votes
10answers
4k views

Is it possible to power on/off a monitor using the computer?

I was wondering if it was possible to power on/off a display using a computer connected via HDMI. Let me explain : I want my computer to power off my monitors (not standby mode) when I don't use it ...
0
votes
2answers
226 views

how to automate pc shutdown & power off?

How could I automate the nightly shutdown and power off of my computer at the mains. That is aiming to use zero electricity during the night. Requirements Can configure time you want shutdown ...
1
vote
0answers
253 views

How to prevent “lock” on screen power-off in Windows 8

If my screen turns off due to power saving settings in Windows 8 the PC gets locked also. Is there a way to delay the locking another minute? I have no screen saver set (where the lock setting would ...
0
votes
0answers
2k views

How to enable different ACPI Sleep Modes with Asus UEFI BIOS

I'm using a new asus motherboard which supports ACPI 2.0a, and am running Windows 8. I'm trying to figure out how to maximize energy efficiency and component lifespan. This computer is only used for ...
1
vote
2answers
474 views

Why is my hardware switching on a smart power strip if the desktop is off?

I bought a smart power strip to manage my electricity usage at home. I have a large desktop machine that is my main computer during the times when I am at home. I have my main power supply hooked up ...
1
vote
1answer
2k views

Windows 8 goes into sleep even if it's deactivated

I'm using Windows 8 Pro on my notebook. I set the energy settings to "sleep: never". Nevertheless the notebook goes into sleep mode after some minutes of inactivity. I don't have an external sleep ...
0
votes
1answer
463 views

No image after waking up monitor

Quite often then my monitor goes back to power mode after being in power saving mode (which is initiated after defined period of inactivity), there is just black screen, however it seems like ...
1
vote
1answer
240 views

Linux CPU energy saving hacks

I have a quad core CPU (Phenom II 945), because sometimes I need performance, but most of the time, 4×800 MHz (the minimal frequency) is still overkill for most usages. So, three questions ...
1
vote
1answer
82 views

How can I turn off the display with the Griffin Powermate in Windows?

I want the display to turn off after a long press onto the Griffin Powermate. The software that Griffin provides for windows allows "opening an application"; but it cannot open the shortcut ...
1
vote
3answers
137 views

Will a UPS switch power off all connected loads in one action?

I am going on vacation and was going to buy a power supply cord with a disconnect switch to power OFF all my equipment, eliminating phantom load. Can I use the OFF/ON switch on my UPS to perform the ...
1
vote
1answer
37 views

Audio playback prevents standby

Playing back audio (actually it's the driver, not the specific application used) keeps my Windows 7 system from going to standby - any way to change this behaviour? While it might be useful in ...
0
votes
1answer
328 views

Sleep mode in Win7 doesn't work any more (shuts down PC somehow, and taking very long to load system again), battery defect?

UPDATE: So, i figured out that i behaves like i remove battery when sleeping. Like it has no power connection, how could that be? OLD POST: I'm not sure what is wrong, but after putting in ...
2
votes
1answer
221 views

How efficient is Windows 7 in using battery power as compared to Windows XP in similar power plans?

Windows XP didn't have Aero glass and other visual effects and shadow indexing (for fast search) that probably consume extra power in Windows 7. I wonder if disabling some of those features will save ...
2
votes
1answer
5k views

How efficient is Windows 8 in using battery power as compared to Windows 7 in similar power plans?

I'm very specific about the time my laptop battery can last as it is very important to me. Will my laptop's battery last longer with Windows 8 or Windows 7, both in similar power plans, considering ...
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vote
2answers
971 views

Windows home server build that is energy efficient

I want to build a home server and I plan to run windows server 2012 essentials. I want to use it for storage, file sharing, dlna to my tv, host a couple of websites (not much traffic if any at all) ...
4
votes
2answers
642 views

Automatically disable devices to save power and mitigate DMA attack in Windows 7

Some OEM include energy saving apps that can switch off certain devices such as webcam or optical drive. Is there any brand-agnostic app out there that can do it? If the list of disabled device is ...
1
vote
1answer
967 views

How to make VGA display go into standby when no computer/laptop connected

At my work most people use laptops, in combination with a stand-alone Dell LCD (connected through a VGA cable). Problem: if you unplug your laptop from the display, the display doesn't go to sleep ...
0
votes
1answer
170 views

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 ...
2
votes
3answers
3k views

Making laptop not increase/decrease screen brightness when changing power source

When I disconnect my laptop from AC power, its screen becomes more dim, in order to save battery. When I connect it back to AC power, it becomes bright, because now it's not concerned with battery ...
12
votes
1answer
538 views

Power Options: Turn off harddrive. Effective or dangerous?

I keep a PC running 24x7 as it handles several light (processor-wise and disk-wise) tasks and acts as a jumping point into my network from outside. I'd like to keep it as energy efficient as possible. ...
1
vote
1answer
1k views

Want to throttle CPU on Windows 7 desktop, but it is ignoring Max CPU setting in Power Options

I want to be able to substantially throttle down the CPU on my desktop, which due to space constraints is in our bedroom and the wife is suspending it each night because of the fan noise. I've tried ...
1
vote
1answer
2k views

Device disconnected sound in Windows 7 while monitor is in energy save

When Windows 7 power management turns off my monitor after the set time, it starts repeatedly playing the "Device Disconnected" sound. I know Windows is playing this sound because it no longer senses ...
2
votes
3answers
746 views

Power optimization in Linux

I am working on a traffic surveillance project which performs various image processing tasks with a number of visual sensors and a computing platform. My basic task in the project is the power ...
1
vote
3answers
4k views

Do Aero effects in Windows 7 slow down the computer? [closed]

Do Aero desktop effects in Windows 7 slow down the computer? And does Aero actually cause more CO2 emissions than Windows XP?
8
votes
4answers
1k views

How can I save energy when using a notebook?

I'm using a notebook as my only computer and I'm wondering how I might save the most energy (in terms of my electricity bill). Will it use less energy overall to only plug it in if the battery is low ...
3
votes
2answers
226 views

How can I determine the ecological impact of a computer?

How do I determine or even quantify how much ecological impact my computer has? Are there established ways of doing so, or bodies that do this in whole or in part? I'm thinking of things like the ...
1
vote
0answers
179 views

Trading out 110W processor for 35W processor: how much could I really save?

My current processor is a 110W AMD X2 4600+. For fun, I was looking at a 35W Core i3 2100T. Looking around I couldn't find a direct performance comparison anywhere between the two, but it looks like ...
3
votes
4answers
3k views

Windows software to show computer's energy usage or battery discharge rate

Is there any software for Windows 7 which can show a computer's energy usage in real-time? I am currently using Battery Bar, which gives an estimated discharge rate, but this is essentially an average ...
1
vote
1answer
58 views

Should I use a server kernel when making a ssh server?

I am setting up my desktop as an ssh server and leaving it at home while I travel and connect with a laptop. Will the server kernel provide any advantages for such a simple use as this? Like energy ...
1
vote
1answer
409 views

Missing “energy saving” settings on MacBook Pro

MacBook Pro - Official manual: Your MacBook Pro comes with two graphics processors, one for better battery life and the other for higher performance. To switch between processors, open ...
23
votes
7answers
21k views

Can I sleep one of the displays on a dual-monitor setup (running Windows 7)?

I want to be able to 'put the display to sleep' on one of my two monitors when it isn't needed, so it doesn't distract me or use unnecessary power. Ideally, the display would be asleep, but the OS ...
14
votes
3answers
2k views

How much power do video cards use after Windows turns your display off?

Modern video cards seem to use 150-200 Watts at idle. Does this mean that this is the minimum power the video card will ever draw while your computer is on? It's clear that if you are sitting at the ...
6
votes
3answers
3k views

Do not wakeup Mac on mouse movements

I never switch off my mac in the office, instead i use the energy saving mode to suspend the mac to disc. This is all working fine, but I have one problem: when the cleaning lady is cleaning the ...
2
votes
1answer
195 views

Does the power consumption for non-scaling processor vary from idle to busy?

Even though newer processors come with scaling (SpeedStep, Cool'n'Quiet), some computers have motherboards with outdated bios which do not support the feature. Thus, they run at full clock speed. Even ...
1
vote
1answer
92 views

Displays won't stay off when I put them to sleep in MacOS

In MacOS, when I press Shift Control Eject the displays go blank for a second, then they turn on again. There's no way I can get them off permanently. I also don't want the computer to sleep as I ...
3
votes
1answer
1k views

CPU fan running too hard and too often - where to start diagnosis?

I have a self-assembled computer based on a barebone (a Shuttle XPC). Its fans are running at a very high level even under moderate load, and even higher (and louder) if there's work to be done, ...
0
votes
1answer
328 views

Keep iMac awake but the screen off

Is there a way to keep iMac awake but let display sleep? Programs like Caffeine and Jiggler will keep the screen on and this is what I'd like to avoid.
4
votes
2answers
8k views

Turn off monitor (energy saving) while in text console mode (in Linux)

How to configure Linux text console to automatically turn of the monitor after some time? And by "text console" I mean that thing that you get on ctrl+alt+F[1-6], which is what you get whenever X11 ...
4
votes
3answers
342 views

What is keeping my disks awake?

I have configured my hard drives to go to sleep after 1 minute of inactivity. This used to work very well; the server was almost always dead silent. But recently the drives are more often awake. Can ...