What is your desktop power usage while browsing these forums?

Page 4 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.

What is your "active idle" power usage for your desktop?

  • <20W

  • 20-30W

  • 30-40W

  • 40-50W

  • 50-60W

  • 60-70W

  • 70-85W

  • 85-100W

  • 100-120W

  • >120W


Results are only viewable after voting.

Idontcare

Elite Member
Oct 10, 1999
21,110
59
91
My V6 toyota sienna will never get anywhere near the mpg as my prius. Never. One gets me 45-50 mpg city driving, the other gets me 16mpg city driving, same driver, same driving style, same commute route, etc.

If you are saying a V8 jag with twin turbos gets the same gas mileage as a 4cyl honda civic then I got to really scratch my head at that. I would think the Jag dealership would advertise that as fact and claim the EPA rated mileage was the same for the Jag as the Honda dealership claims it is for the civic.

I only wish my V6 minivan got 45mpg city like my V4 prius does, heck I'd love for it to just be double its current sucky 16mpg. I'm selling the van soon though, can't wait to offload that gas hog :\
 

westom

Senior member
Apr 25, 2009
517
0
71
I am so use to seeing low-activity power draw in the 80-90W range with my other rigs, I about fell out of my chair when I saw how low it is with this setup.
Why do so many just *know* their rig needs a 600 or 800 watt power supply? Too many, who claim to be technically informed, only recite popular myths. Subjective claims are how to educate the naive. Too few learn by measuring; by obtaining and learning from numbers. Some get angry when they are required to know numbers.

With a recent breakthrough in semiconductor processing (ie hafnium), power numbers began dropping slightly. But no computer was consuming energy like a bread toaster. Anyone could easily use their hand to know computers were not consuming so many hundred watts.

Cars are another example of too much knowledge without first learning facts. The 70 horsepower per liter engine that obsoleted V-8 and V-6s was ready for production in GM in 1975. And kept out of the market until technical people in Toyota, Honda, VW, and other (more responsible) companies began manufacturing it. Today's 4 cylinder engine does what a V-8 did in 1975. Of course. As required to advance mankind. It is called innovation. A concept too many do not understand because they just know without first learning the numbers. Because too many only learn from subjective myths or advertising - no numbers.

Good luck getting highway mileage from a car designed by business school graduates (ie Chevy). Routinely exceeded are EPA highway mileage in cars designed by 'car guys'. 'Car guys' design to optimize mileage in real world driving. 'Bean counters' optimize a design to only have higher EPA numbers. Cars designed by 'bean counters' have difficulty meeting EPA highway mileage. Do the numbers yourself.

The informed also realize discount gasoline is typically 30 cents higher than the posted price. Gasoline selling at a discount station for $3.60 really cost about $3.90 per gallon. Because gas mileage is so much lower. Multiple tanks from superior brands are required to restore mileage.

Dollars per gallon is only relevant when including that 30 cent price increase. Dollars per mile are more relevant. Again, how many learned this by doing numbers?

In every case, a real world answer requires numbers based in science. And confirmed by numbers from experimental evidence.

Due to technical naivety, we tell computer assemblers to installed 600 watt supplies. Since these assemblers have no idea how to do the numbers that matter (ie amps). Too many assemblers only know what they were told - subjectively.

Massively oversize a supply so we do not waste time on customer support lines explaining to the technically naive what they refused to read. Or waste time debugging problems created by that technical naivety. Computers do not consumer 500 or 800 watts despite so many computer assembler who know otherwise.
 
Last edited:

jaqie

Platinum Member
Apr 6, 2008
2,471
1
0
Some of what you say makes no sense to me, but...

The PC PSU parts of what you say are so true. I have a system based off of a pc power & cooling pre-merger 420w power supply, fueling an overclocked thuban x6 which takes (actual)~160w and my (actual)124W HD6850, along with standard amount of other parts in my system, and it has room to breathe. I get told quite often "get a bigger psu" but this one has plenty of headroom for what I have. I have a kill-a-watt and a multimeter, and I use them. I am really strong in the 'applied physics' department, from self-teaching and always was.

A lot of my friends call my Miss MacGyver... it's a shame there aren't more of us around.
 

jaqie

Platinum Member
Apr 6, 2008
2,471
1
0
My V6 toyota sienna will never get anywhere near the mpg as my prius. Never. One gets me 45-50 mpg city driving, the other gets me 16mpg city driving, same driver, same driving style, same commute route, etc.

If you are saying a V8 jag with twin turbos gets the same gas mileage as a 4cyl honda civic then I got to really scratch my head at that. I would think the Jag dealership would advertise that as fact and claim the EPA rated mileage was the same for the Jag as the Honda dealership claims it is for the civic.

I only wish my V6 minivan got 45mpg city like my V4 prius does, heck I'd love for it to just be double its current sucky 16mpg. I'm selling the van soon though, can't wait to offload that gas hog :\
What year is your sienna? is it the same engine type as the prius? I was comparing apples to apples, car sizes that were similar, engine types that were similar (all ICE vehicles), years that were the same (brand new). Yours has either 1/3 or 0/3 of those...
I was also talking about highway mileage, which is what the topgear episode focused on, city driving of course a small hybrid is going to win. highway driving to cars is like near idle is to internal combustion engines, it's what is easiest on them and where they are the most efficient.
 

VirtualLarry

No Lifer
Aug 25, 2001
56,570
10,205
126
The informed also realize discount gasoline is typically 30 cents higher than the posted price. Gasoline selling at a discount station for $3.60 really cost about $3.90 per gallon. Because gas mileage is so much lower. Multiple tanks from superior brands are required to restore mileage.

Dollars per gallon is only relevant when including that 30 cent price increase. Dollars per mile are more relevant. Again, how many learned this by doing numbers?

In every case, a real world answer requires numbers based in science. And confirmed by numbers from experimental evidence.

I would like to know how a gallon of 86 octane gasoline, has lower gas mileage than a different gallon of 86 octane gasoline.

Please feel free to use chemistry to explain yourself. Because I don't really follow your theory.
 

pm

Elite Member Mobile Devices
Jan 25, 2000
7,419
22
81
How did we off to talking about car mileage? For what it's worth, I love my 2010 Prius though. I installed an enginer.com plug-in battery kit and I get ~72mpg in the summer and ~55mpg in the winter (using the heater turns on the engine more regardless of the battery SoC).

But anyway, back on the original topic. I'm browsing on 107W. Which seems high from the poll...

Core i7-2600K overclocked to 4.4GHz
16GB GSkill DDR3 1600 "ripjaws"
ATI Radeon 7950 w/ 3GB
Intel 300GB SSD, Seagate 1.5TB HD
Seasonic 460W passive power supply
 

Idontcare

Elite Member
Oct 10, 1999
21,110
59
91
I would like to know how a gallon of 86 octane gasoline, has lower gas mileage than a different gallon of 86 octane gasoline.

Please feel free to use chemistry to explain yourself. Because I don't really follow your theory.

How Does Ethanol Affect Gas Mileage?

Ethanol contains approximately 33 percent less energy than gasoline. If you were to run 100 percent ethanol (E100) in your vehicle, you’d expect to take a 33% hit to gas mileage.* (Theoretically, since you can’t legally run 100% ethanol.)

With E10, it’s a 3.33% penalty. Seeing that you can’t buy E0, there’s not much you can do about it.

We tested E85 vs E10 in a FlexFuel Buick Regal Turbo and experienced a 12% drop in gas mileage.

Question: I would like to know how a gallon of 86 octane gasoline, has lower gas mileage than a different gallon of 86 octane gasoline.

Answer: When your government decides a gallon of gasoline is no longer going to contain a gallon of gasoline :D
 

westom

Senior member
Apr 25, 2009
517
0
71
I would like to know how a gallon of 86 octane gasoline, has lower gas mileage than a different gallon of 86 octane gasoline.
I am totally confused why you think octane determines energy content. Please explain how octane increases gas mileage. Please explain what that number means.

Why introduce octane into this discussion? It was not discussed or even implied previously. The topmost point was about so many told what to think rather than learn from the numbers. What specifically does octane define? More energy? If octane is relevant, then please explain why an octane number determines gas mileage. The point is about many who know (or doubt) without first learning numbers and what they mean.


Why do brand name computers have smaller power supplies? Numerous reasons. Including where watts are measured. And what numbers are relevant. Watts are an 'executive summary' number for many who know little about power supplies or electricity. A relevant number is amps for each voltage. Another example of numbers unknown to many who recommend. So we dumb it down. We say he needs a power supply that is more than double the watts required.

As so many demonstrate by collecting numbers, computers do not need 600 and 800 watt supplies.

Numbers also demonstrate why many drivers pay more by purchasing gasoline with the lowest price per gallon. By 'knowing' without even measuring. Anyone can do MPG numbers. Those who do not learn from numbers are often easily scammed by myths.
 

jaqie

Platinum Member
Apr 6, 2008
2,471
1
0
re: what is octane?
Octane is actually an artificial scale of how much compression a gaseous or atomized (sprayed via injectors or mixed via carburetors in the case of gasoline and other liquid fuels) resists compression without self-ignition. It does not determine energy content, only a gaseous or gasified (atomized) fuel responds to pressure , it's resistance to self-ignition. It is actually an artificial scale of 0-100 measuring the resistance to self-ignition 0 being chosen as the self ignition point of pure heptane, and 100 being the point of pure octane, hence it's name of octane-heptane rating or octane-heptane scale, shortened to octane or octanes. This is why things can be below 0 and also be above 100, it is simply a scale between these two fuels.

quoted straight from memory: I am a documentary and engineering nut, I live to learn this kind of stuff.
 

VirtualLarry

No Lifer
Aug 25, 2001
56,570
10,205
126
I am totally confused why you think octane determines energy content. Please explain how octane increases gas mileage. Please explain what that number means.
"Octane ratings are not indicators of the energy content of fuels." - wikipedia

Well, you learn something new every day, I guess. I thought that gasoline with equivalent octane ratings had equivalent energy ratings, but I'm probably wrong about that too.

Edit: That does beg the question - if higher octane fuels do not contain more energy than lower octane ones, then why do they cost more? If they were just like flavors of ice cream, why don't they all cost the same per gallon, like ice cream does?

Edit: And yes, in some vehicles, lower-octane gas causes engine knock, which results in not all of the stored energy being used efficiently, which will cause your gas mileage to go down.
 
Last edited:

Tsavo

Platinum Member
Sep 29, 2009
2,645
37
91
Simple guess....150W for 2 desktops. Core i5/750 with Dell 2312HM and Core i5/3570 with Dell 2412M.

It would be closer to 145W, but my power company started using E85 electrons...damned corn subsidies.
 

Tsavo

Platinum Member
Sep 29, 2009
2,645
37
91
I want to know if getting a PSU rated for 87 octane would be better than a PSU rated for 97 octane, and do they take into account the varying levels of ethanol that various power companies include in their supply of electrons.

Building computers these days is no easy task.
 

jaqie

Platinum Member
Apr 6, 2008
2,471
1
0
Edit: That does beg the question - if higher octane fuels do not contain more energy than lower octane ones, then why do they cost more? If they were just like flavors of ice cream, why don't they all cost the same per gallon, like ice cream does?
This is simply because they require exponentially more processing and less fuel comes out the "end" of the process.
Edit: And yes, in some vehicles, lower-octane gas causes engine knock, which results in not all of the stored energy being used efficiently, which will cause your gas mileage to go down.
See my previous post. There's a lot more than efficiency being lost, it can ruin the engine if allowed to continue. It can also happen if a car tuned for low altitude is run in high altitude, the only quick fixes without going to a mechanic would be putting in higher octane fuel and/or octane enhancing fuel additives (which actually usually are contained in fuel injector cleaner, which can save engines in a pinch).
 

Haserath

Senior member
Sep 12, 2010
793
1
81
My V6 toyota sienna will never get anywhere near the mpg as my prius. Never. One gets me 45-50 mpg city driving, the other gets me 16mpg city driving, same driver, same driving style, same commute route, etc.

If you are saying a V8 jag with twin turbos gets the same gas mileage as a 4cyl honda civic then I got to really scratch my head at that. I would think the Jag dealership would advertise that as fact and claim the EPA rated mileage was the same for the Jag as the Honda dealership claims it is for the civic.

I only wish my V6 minivan got 45mpg city like my V4 prius does, heck I'd love for it to just be double its current sucky 16mpg. I'm selling the van soon though, can't wait to offload that gas hog :\
And they'll never get the mpg of this!

http://www.youtube.com/watch?v=Z0m-cUxMcJw

Oops... I divided by 0.():)
 

westom

Senior member
Apr 25, 2009
517
0
71
Well, you learn something new every day, I guess. I thought that gasoline with equivalent octane ratings had equivalent energy ratings, but I'm probably wrong about that too.
More important, by making a mistake (by trying to relate to a number and being wrong about it), then you learned something. Making mistakes is essential to learning and to learning how to learn.

The point is not about what gasoline causes higher mileage. The point is what a Kill A Watt also demonstrates. To know something means that basic science concepts are tempered by experimental evidence - the numbers. Without both, then a conclusion is only junk science reasoning or unjustified speculation.

The Kill A Watt confirms a computer cannot double as a toaster oven. And provides other basic concepts that any layman should appreciate. Such as the relationship between watts and volt-amps. Numbers are easily obtained. And expose popular myths often promoted by computer assemblers or salemen selling a magic box that "reduces electric bills".

Why do some machines consume more power? Some semiconductors (ie AMD) consume more power because a manufaturer was slow to implement latest semiconductor breakthroughs. Hafnium being one example. But again, that is a hypothesis. What do the Kill A Watts report?

Another concept also should be confirmed by each auto driver recording his own numbers. Discount gas, in essence, costs about 30 cents per gallon more than its posted price. My experience demonstrated that multiple tanks of a better brand gasoline was required to restore mileage numbers. That hypothesis can be confirmed by data. By recording mileage and gallon numbers.

One report that originally introduced this recommended only five national brands acceptable for their cars: Shell, Exxon, Amoco, Chevron, and Texaco. The report only considered national brands. Some regional brands may also contain additives that increase gas mileage.

I also located one station that was not pumping gasoline reported on the pump. My numbers suggested they were shorting pumped gas by 8% to 10%. The car was taking more gas than its gauge suggested was required. Gas mileage was always too low when gas was purchased at that station. The same problem occurred multiple times.

Again, the point. Numbers provide necessary perspective. Kill A Watt is a superb tools for any layman because it provides numerous relevant numbers. Knowledge always requires numbers.
 

westom

Senior member
Apr 25, 2009
517
0
71
...and do they take into account the varying levels of ethanol that various power companies include in their supply of electrons.
Be concerned about domestic electrolytic capacitors made with ethanol per a recent government mandate. Imported capacitors do not have this problem.

Never buy something engineered by a Senator.
 

2is

Diamond Member
Apr 8, 2012
4,281
131
106
Why let powerful computers go to waste? Find a Boinc project and start participating.

My computer isn't going to waste. It gets used when I need it and doesn't when I don't. DC projects do nothing for me except increase my power bill.
 

Tsavo

Platinum Member
Sep 29, 2009
2,645
37
91
Dang thread made me order a Kill-A-Watt.

If nothing else, I'll get my power cords sorted and neatened out.

Will be interesting to see how close I am to my 150W guess.
 

2is

Diamond Member
Apr 8, 2012
4,281
131
106
Dang thread made me order a Kill-A-Watt.

If nothing else, I'll get my power cords sorted and neatened out.

Will be interesting to see how close I am to my 150W guess.

lol. I didn't own a Kill-A-Watt before this thread either. IDC owes me $30
 

Idontcare

Elite Member
Oct 10, 1999
21,110
59
91
It would be closer to 145W, but my power company started using E85 electrons...damned corn subsidies.

Oh damn :D my sides are a hurt'n after reading that! That was good :thumbsup:

OK today's project starts with my rarely used HTPC.

Why is it rarely used? First, because I hate the fact I can hear it when it is turned on in the family room :| No one else can hear it...but I can and it annoys me, so I Netflix through my Wii instead of through my HTPC.

Spec's on my HTPC:
  • CPU: Q9505 2.83GHz 45nm Quad (stock, lapped, cooled with lapped Tuniq120)
  • mobo - ASUS P5E WS Pro
  • ram - 4x2GB DDR2-800 (not OC'ed)
  • video - Nvidia 9500 GT
  • SSD - OCZ Vertex 2 120GB
  • HDD - three 3TB Hitachi 7200rpm drives
  • PSU - 450W Rosewill Fortress-450 80 Plus Platinum
  • fans - 6x120mm low-rpm thermaltake fans (the not quiet kind :mad:)
This system is pulling 130W from the wall (not counting LCD) as I type this post, nothing else is going on in the background.

130W! D:

When I wait for the 3 3TB drives to sleep the power goes down to 120W. That is quite the power suck. I'd be better off replacing this Q9505 with my FX8350, more performance and lower power.
 

Idontcare

Elite Member
Oct 10, 1999
21,110
59
91
lol. I didn't own a Kill-A-Watt before this thread either. IDC owes me $30

I'll just deduct it from your growing "protection" tab here on my books.

Ya know, "protection" against silly things that can randomly happen to your Anandtech forum account when admins get piss-drunk by noon on a Thursday and forget to be mindful of what they are deleting in the vB database :whiste: ;) :D

Not that you'd ever be so reckless and irresponsible as to allow your full coverage 24x7 "admin protection policy" go unpaid :colbert: Right? RIGHT!?

Good chat, glad we continue to see eye-to-eye here and we both part ways seeing this as a "win-win-win" for me, myself, and I...:p
 

NTMBK

Lifer
Nov 14, 2011
10,409
5,673
136
Oh damn :D my sides are a hurt'n after reading that! That was good :thumbsup:

OK today's project starts with my rarely used HTPC.

Why is it rarely used? First, because I hate the fact I can hear it when it is turned on in the family room :| No one else can hear it...but I can and it annoys me, so I Netflix through my Wii instead of through my HTPC.

Spec's on my HTPC:
  • CPU: Q9505 2.83GHz 45nm Quad (stock, lapped, cooled with lapped Tuniq120)
  • mobo - ASUS P5E WS Pro
  • ram - 4x2GB DDR2-800 (not OC'ed)
  • video - Nvidia 9500 GT
  • SSD - OCZ Vertex 2 120GB
  • HDD - three 3TB Hitachi 7200rpm drives
  • PSU - 450W Rosewill Fortress-450 80 Plus Platinum
  • fans - 6x120mm low-rpm thermaltake fans (the not quiet kind :mad:)
This system is pulling 130W from the wall (not counting LCD) as I type this post, nothing else is going on in the background.

130W! D:

When I wait for the 3 3TB drives to sleep the power goes down to 120W. That is quite the power suck. I'd be better off replacing this Q9505 with my FX8350, more performance and lower power.

Yikes! That's a lot of power being sucked down by a TV box. Maybe it'd be worthwhile updating it later this year? Either a low-power Kabini or a 22nm Atom should have plenty of processing power for a HTPC (in both CPU and GPU), and potentially be cool enough to cool passively... nice silent HTPC.
 

Idontcare

Elite Member
Oct 10, 1999
21,110
59
91
Yikes! That's a lot of power being sucked down by a TV box. Maybe it'd be worthwhile updating it later this year? Either a low-power Kabini or a 22nm Atom should have plenty of processing power for a HTPC (in both CPU and GPU), and potentially be cool enough to cool passively... nice silent HTPC.

The irony is that I intentionally upgraded this thing from a 65nm Q6600 to the 45nm Q9505 just to get the power-usage down.

But yeah, it is being replaced this week.

The Q9505 is going to an Aunt who rarely uses her desktop but she needs one for the infrequent accounting and tax business she does on the side.

So while it is a power-hog of sorts, and totally overkill for her needs, it won't be powered on for days on end either so it'll be ok for that purpose.
 

jaqie

Platinum Member
Apr 6, 2008
2,471
1
0
The irony is that I intentionally upgraded this thing from a 65nm Q6600 to the 45nm Q9505 just to get the power-usage down.

But yeah, it is being replaced this week.
This is really making me start to wonder about the q9650 I got for $50 at the computer goodwill the other day... I thought it would be nice on the power bill like the q6600@3GHz I used to have...

it SHOULD be pretty good judging by cpuworld's stats but you never know, yaknow?
http://www.cpu-world.com/CPUs/Core_...569PJ080N (BX80569Q9650 - BXC80569Q9650).html