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Five PC Power Myths Debunked
snydeq writes "Turning off PCs during periods of inactivity can save companies between $25 and $75 per PC per year, according to Energy Star, savings that can add up quickly for large organizations. Yet most organizations remain behind the times on PC power management, in large part due to common misperceptions about PC power, writes InfoWorld's Ted Samson, who outlines five PC power myths debunked in a recent report from Forrester, ranging from the energy savings of screen savers, to the energy draw of powering up, to the difficulties of issuing patches to systems in lower-power states."
All through college I left my PC on 24/7, however now that I'm paying the bill I have thermal throttling and the other new power-saving standards all turned on, and I turn everything off (router, modem and all) entirely when I'm not using it. It's odd the way people look at it; at work some users say "Well I never leave it on at night because I know that it makes the computer die quicker" and some people say "Well I never turn it off because I want it to last longer." I think the truth is that modern hardware really can handle both philosophies and it's just a matter of convenience vs. power costs at this point.
1.42kw for the computer to run overnight has a cost of around 10 cents to the company.
Waiting 5 minutes for your PC to boot at the federal minimum wage of $6.55 per hour has a cost of around 55 cents to the company.
It costs the company at least 5 times as much to have you boot your PC in the morning as it does to let it run overnight.
Moderating "-1, Disagree" is simple censorship. Have the guts to post your opinion.
Of the four instances in which watts were referenced (directly or in compound units), three are completely boneheadedly wrong:
They should be:
You *can't* call it a typo when they are perfectly backward in three out of four incidents. And you can't call it "They just got it backward..." when they got it right once. You must conclude, therefore, that they have almost no grasp whatsoever of units.
Well 15 minutes of power on and power off is a bit exaggerated (unless you really misconfigure linux). Normally for most business PC it takes about 1 minute to power on and power off doesn't need to be counted as you can perform this action without you actually there you hit shutdown and it does its thing.
That being said...
>>> (20.00/60)*5*(48+(4/5))
80.0
Assuming 20.00 an hour average wage (40k per year)
We divide this by 60 to give the rate per minute.
Multiply this by 5 for the five work day week.
Then multiply it by 48 and 4/5 for fifty work weeks (2 week vacation) a year and subtract one extra week and a day for holidays (New Years, Memorial Day, Independence Day, Labor Day, Thanksgiving, Christmas) .
So in theory it is more expensive to power on every day...
However the human factor is not factored in even for your 10 minute days of inactivity. At the beginning of the day most people are not at 100%. They will power on the computer, take off their jackets, get some coffee, put their lunches in the kitchen, greet some people, clean their desk up a bit. Also any loss productive during 10 minutes can usually be made up.
So you might as well power off at the end of the day and save some power and be better for the environment.
If something is so important that you feel the need to post it on the internet... It probably isn't that important.
Any modern PC can S3 suspend.
S3 suspend cuts power use by 95% and the PC resumes *INSTANTLY*.
I can S3 suspend my laptop and have it run off the battery for over a week - open it up and I am back where I left off in about 2-3 seconds.
There is no argument against having an IT policy MANDATING S3 suspend. Hell you can even automate it to do it by default every day at 6 PM unless the PC is in use (easily checked by screensaver APIs).
Depends on where you live and what you're heating. Ignoring regional variations in costs and heating needs, a natural gas forced-air system will heat the entire house, requiring substantially more money than electric radiators, which are per-room.
Combine this with places where electricity is remarkably cheap (e.g. large hydro works) and natural gas is expensive (e.g. all imported), and you are better off heating with electricity. Even if you live in an area with cheap natural gas, electric radiators allowing you to heat only the spaces you're using may end up saving you money over heating a whole house at night to keep the temperature toasty in two occupied bedrooms. This is especially true in Mediterranean climates, where natural indoor temperatures remain above 12 C even in the winter, thus requiring a comparatively small "bump" to hit the desired 20-22 C range.
In any case, waste heat generated by electronics is salutary, so long as the electronics are being used for their primary purpose as well.
Same here. This is the point I stopped reading too. Anybody that thinks that a PC takes 89 watts per hour isn't worth listening to for technical advice. The next line just cemented it for me "If it's left on overnight for 16 hours, it consumes 1.42kW." Aaarrrrg. How did our basic science education go so wrong??? Please tell me that this guy is really a movie reviewer that is sitting in for the technical person as they take the holidays off.