Tip & How-To about Computers & Internet

How to reduce the power used by your PC and cut costs on your power bill.

Many of people today face the ever increasing fact that electricity is getting more a more expensive. Computers tend to add a considerable amount to the bill as they sometimes run for long periods of time. But recently with the whole scare of global warming and what-not computer hardware manufactures have come around to the fact that more and more people want to become environmentally friendly and reduce the'r carbon footprint. So this is a great situation for the end user as the power bill is reduced and in turn, less pollution is made for the environment.

If you're thinking of building a new PC and want to reduce your power bill, consider the following points:

Buy a power supply unit that is 80 plus certified. This means maximum efficiency is obtained when your pc is running with minimum power wastage. PSU manufacture Cooler Master produces excellent power supplies that are 80 plus certified.
Consider purchasing a case that has excellent natural airflow. The more freely air can be moved, the less need for more case fans. Antec have advanced chassis that are aimed for low airflow situations.
Think about buying an energy efficient motherboard. Gigabyte have a lot to offer with their motherboards consisting of dynamic energy saving technologies, your PC will run much cooler and be more reliable.
The processor you purchase will make a big difference on power usage. Both Intel and AMD have technologies to keep power down to a minimum such as "green" CPU's. Intel processors currently are a lot faster but run hotter than AMD and AMD is a better value for money. You should also decide whether to buy either a dual core, quad core or six core.
Consider buy a Western Digital hard disk, as Western Digital has produced a "Green Drive" which is a technology that reduces hard disk power consumption.
When it comes to RAM, if you're not into gaming then you can get "Eco Friendly" RAM which used less power. It may run a little bit slower than normal RAM but if you're not into serious performance gaming or HD encoding then it's fine.
Some Graphics cards are Eco editions; you can take a look at them if you intend to do gaming every now and then or want to watch HD movies.

If you're not planning on building a PC anytime soon and would like to reduce power consumption on your existing system, try these ideas:

1) If you're running an AMD processor, enable Cool "n" Quiet in the BIOS as this will throttle the CPU when not in use.
2) If you're running an Intel processor, enable Intel SpeedStep Technology in the BIOS as this will throttle the CPU when not in use.
3) Lower your monitor's brightness setting.
4) Shut off your monitor in between breaks.
5) Don't leave your computer on overnight.

By following these points, you will see a reduction in power usage from your PC. This in turn means the air will be cleaner and you'll save money from your power bill.

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Why is our schools electricity acount so high? Just for January this year we paid three times R4000,and still the acount balance is R4800.The account was never in arrear!

Hello, Willem -

You will need to ask your question of the electric power utility which supplies the school with electricity (in South Africa?)

Perhaps the rate for electricity has increased drastically lately. Have you compared the usage from the previous month (kilowatt hours) with the same time period the previous year? If the usage amount from 12 months prior is similar to the usage amount in the previous month, then it is clear the rate per kilowatt hour increased significantly. I am answering from the USA where we receive advance notices of electricity rate increases.

Or, has the usage amount (kilowatt hours) increased greatly? If the usage amount increased significantly, then, there has been an increase in electricity consumed. Have more electrically-run computers or other equipment been added in the school? Are school staff and students recharging their personal portable electronic devices with school electricity and not at home? Is there suspicion that someone or some entity is pirating school electricity?

By the way, Fixya.com is intended as a website for questions and answers on how to go about REPAIRING _THINGS_. Plus, your question landed in a Fixya category for Computers & Internet and not one relevant to electric power utilities.

Best wishes.

Feb 03, 2018 | Balance Computers & Internet

1 Answer

rheem 21vp40 1

Copy following links to identify type of thermostat, and see how to adjust temperature on that specific thermostat, and see other ways to increase amount of hot water
Add a comment and describe if water heater is gas or electric, and add what other problems you are experiencing.

Jul 14, 2013 | Water Heaters

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I increased memory from 512 to 768 on Dell desktop with 2.4 celeron but did'nt seem to increase speed.what is the problem? Ray.

That minimal amount of increase is not going to be a very noticeable increase also the processor or a faster RPM hard drive is more for the speed. you can go to the system properties in control panel and then the advanced tab and then the settings tab on performance then to the Advanced Tab then to change tab in virtual memory then to custom size make the initial setting 1.5 times the amount of memory installed in your case 768 x 1.5 = 1152
on the max 3 x the amount of memory again, in you case 768
768 x 3 = 2304

Jul 07, 2010 | Dell Dimension 2400 PC Desktop

1 Answer


Have actually done some research on those and found that the horsepower increase advertised is in the higher RPM band (where in essence it is unusable). As far as fuel consumption goes, there is always a "trade-off" when it comes to that. On earlier carbureted engines it was fairly easy to squeeze more mpg from what you drive. Today's injection systems are very precise, and more difficult to get much more than factory standards from them. Three items you can do to get better mpg are: Keep the air filter clean (vacuum and shake out once a month), Use a good quality synthetic oil in the engine. Make sure your ignition system is in good condition and not arcing anywhere. Keep wires clean and plugs properly gaped (if you can't light the fire, you waste the fuel in that cylinder).
A new problem we all face is the introduction of alcohol into our fuel...It does not produce the same btu's of heat when it burns...heat is power.
the more alcohol in a system the lower the mpg is because it takes two times the quantity of alcohol to make the same amount of power.
One other forgotten item is the fuel injectors. Even the most well filtered fuel carries a certain amount of abrasive grit with it. As it passes through the nozzles it enlarges them. This alters the amount of fuel going into the engine. That, coupled with even a small amount of gunk (they all get that to some degree) alters the spray pattern and decreases efficiency.
Back to the "chip" ...I haven't seen anything there that would in any way justify the cost there. If $ were no object, I'd be more likely to put a turbo-charger on the engine and start looking at add-on overdrive units.
That's where you can get good solid results! (but expensive)

Feb 15, 2010 | 1999 Jeep Grand Cherokee

2 Answers

system hangs up when temperature goes upto

you really need to get a new cpu cooler then. the fact that you havent had complete meltdown yet is a little surprising. make sure that when you DO get a new one, you use a high quality heat compound and FOLLOW package instructions. make sure there is plenty of ventilation as well.

Jun 28, 2009 | Mach Speed P4M800 (890552603480)...

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