Slashdot Mirror
Swaying CPU Fans
Vindi submitted a New Scientist story about a CPU fan that flaps in the breeze. 2cm metal or polyester
fan blades, and use less power then a traditional rotary fan. They move less
air then the traditional fan, but for laptops, using 99% less power
can't hurt. Update Hey its a duplicate from saturday! Guess I shouldn't
post while planning my trek to see LotR tomorrow. Go ahead, flame on.
Using 99% less power can hurt if it doesn't cool enough and catches the darn thing on fire.
As x approaches total apathy I couldn't care less.
Look for the most insightful posts from the original article and whore all you want:
0 22 9&mode=flat
http://slashdot.org/article.pl?sid=01/12/13/201
Slashdot covered an almost identical article a few days ago here.
Shh.
I've been looking into this a lot recently, and there's some pretty (ahem) cool developments on the cpu front recently, with x86 architectures.
.13u means a lot. Frequencies are so high and chips are so powerful that underclocking has become a real option. A good general target for fanless operation is about 12 watts. You can go higher with good case airflow, or lower if you're dealing with troublesome ambient temperatures.
Some people point to the VIA C3-800, but if you have real computing needs, steer clear. It runs comparable to a Celeron 400, which is almost, but not quite adequate for general computing. Instead, check out the old reliable suppliers. The shift to
Right now, you can take the Intel Tualatin pIII 1.13GHz (28W), cut the bus speed to around 100MHz, cut the voltage down to about 1.1v and be right in the target range. Of course you won't know exactly w/o experimentation on your cpu, but it *should* be doable. If you're worried about losing efficiency to bus speed, remember that you can compensate by running it on one of the PIII DDR chipsets that are now available (upping effective bus speeds to 200MHz) or waiting until February, when Intel says they'll release a similar part themselves. Additionally, the 512k (vs 256k) cache on the pIII-s will offset lower bus speeds. Just check out the specs of the PIII-M LV models at developer.intel.com and ask how they got to those low wattage numbers with the same core. Since the last fanless G4 was 400MHz and claimed (in its wildest fantasies) to be a supercomputer twice as fast as a pIII, a fanless 800MHz pIII is not insignificant.
Even better, surprise, is AMD. The current mobile palomino runs at 1.1GHz, 1.1v, 25w. This is clearly just an underclock of the current 1.75v desktop XPs. But what it tells you is that the AMD architecture is very open to undervoltage at lower clock speeds.
Now if you consider AMD's forthcoming die shrink, things really look good. Zdnet.de reported (unsourced) that the Athlon 1.73GHz processor would drop from about 75W to 45W after the changeover. Depending on how far you could drop the voltage, you could be looking at a 1-1.2GHz part running at about 10W! Fanless! Now imagine (a beo..no) 2 of these in a well ventilated case, with an MPX board -- 2GHz of dead silent AMD power! Wooo!
that we create a beowulf cluster of repeated Slashdot stories.
No statement is true, not even this one.
...New Scientist will use one of these fans on their editor, his brain will catch on fire, and they'll start publishing articles that are closer to science than a supermarket tabloid.
It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
At least from Piezo Systems Inc. [piezo.com] in Cambridge, MA. Their specs are worth reproducing:
* Input Voltage: 115VAC, 60 Hz
* Capacitance: 15 nF
* Power Consumption: 30 mW
* Volume Flow Rate: 2 CFM, (0.9 l/s)
* Peak Air Velocity: 400 FPM, (2.0 m/s)
* Weight: 2.8 grams
* Mounting: #2-56 clr. holes, 2 places
* Temperature Range: -20 C to 70 C
* EMI/RFI: None
However, they're not cheap. Pricing starts at $149. Additionally there is a Piezoelectric Resonant Blade Element [piezo.com]. Interesting stuff. Hopefully mass production of piezoelectric fans will lower their price to the average customer range.
And the people shall be oppressed, every one by another, and every one by his neighbour Isaiah 3:5
...somehow use the heat from the CPU to power the fan. As the CPU got hotter, the fan would move faster.
I have no idea how this could be done, but there must be a way.
It is tempting, if the only tool you have is a hammer, to treat everything as if it were a nail. - Abraham Maslow
You never know SlashDot may one day have Fans or Cooling devices ass a seprate section.
:P
I would be blown away if the fan would work better for less power
--
The computer told me to press any key to continue,I pressed the one looking like this (|) !!OH SH*T!!
Would be a cpu fan club?
Consistency is overrated.
:)
The Bigger The Headache The Bigger the Pill
The other story deals with cpu cooling fans that are little waving thingees that move FROM SIDE TO SIDE.
This story is about a cpu cooling fan with little waving thingees that move UP AND DOWN.
It's obviously a completely different technology!
Aw, screw it. In the spirit of the season, I'll just wish them both a Merry CowboyNealmas!
Mr. Ska
This means that searches for things like "IBM" or "cpu" or "CSS", etc end up with no results. This makes it much more difficult to find things like duplicate stories about AMD CPU. etc
this likely needs to be fixed so that when an editor searches for a dupe he does not get trapped.
"It is a greater offense to steal men's labor, than their clothes"
It's kind of hard to tell exactly what this article is describing, but it sounds like exactly the same thing at half the size.
--
"Open source is good." - Steve Jobs
"Open source is evil." - Microsoft
We still luv ya... :)
I do have a question. Why not just remove the article after you find out that it's a duplicate? Judging by the... er... quality of comments, is it really worth it to keep the article up?
-AlPhAbEt
For those who are unaware, piezoelectric crystals are items that will change shape under the application of an electric field and/or generate a potential difference (i.e. a voltage) when squeezed.
They're used in inkjet printers - they're in ink some cartridge when an electric field is applied to them and they change shape, forcing the ink out of the I also hear the they used them in the ipod for some sort of playlist control mechanism.
Why isn't there a moderation system set up for the stories that are posted? What I mean is the stories themselves should be modded just like the comments. I think that would make the most open system possible. Also, the editors would have an additional measure to the types of stories that people respond to. That way things like this would be modded down as a repeat and ignored much easier.
This is not meant as a Troll, just constructive criticism.
"It's comin' back around again..." -RATM
words of less than 3 characters are not indexed
/. articles.
This means that searches for things like "IBM" or "cpu" or "CSS", etc end up with no results.
No, it would mean 'is' and 'it' aren't indexed. Since the page actually says less than 4, your second statement is true though - which is wierd considering the number of TLAs in
"don't fall into the fallacy of believing that Perl can solve social problems. Maybe Perl 6 can, but that's a ways off"
It's been a while since I pondered the intricacies of slashcode, but they could probably filter it so that it caught TLAs which were uppercased (well, any three-letter word which was uppercased, it wouldn't know it was an acronym). This would catch stuff like IBM and CSS, since those are the kinds of things people would like to be able to search on.
Communication is only possible between equals
Imagine...
Washington Post: Dec 13, 2018. Details are now emerging about the accident that irradiated much of Germany on Tuesday. Nothing is as yet confirmed, however, initial reports indicate that a heatsink was somehow removed from an AMD processor (PR rating 10,000,000). A bizzare terrorist group with the initials THG may have been involved. Containment was lost, and critical mass was reached almost immediately. AMD representatives have issued a statement in the wake of the carnage: "Obviously, they were using an improperly designed motherboard."
Is your company running tools written by ma
lets see three or less characters, or three or less days ago.
must be a bug in the SlashDot AI they are trying to develop in secret. Something OSDN is developing to see if they can dispense with human story selection, moderation, etc.
think about it. Can YOU tell the differance?
"It is a greater offense to steal men's labor, than their clothes"
Much more important: the article mentions that it produces no noise.
That will save me a headacke or two - my DELL Inspiron desktop-replacement starts an aeroplane everytime it does something harder than running an editor.
"BZZZZZZZZZZZZZZZZZZ"
>> CPU fan that flaps in the breeze
So, um, how much breeze is needed? And if there's a breeze, why do you need a fan?...
Taco gave us permission to flame! Lets go!
:-P
Flame #1: Why is Overrated/Underrated not M2'd? The conspiracy theory here is that since editors moderated with unlimited points, its a way for editors to moderate things they don't like (censorware, anything said badly about them) down without feeling the wrath of M2!
Flame #2: Is the AC privacy on slashdot really safe after upgrading to Slash2.2??
Flame #3: Do you really think that people with a lot of comments need to get out more even though they are indirectly lining your wallet?
Let the flame war begin!
And remember moderators, this is on topic, cause Taco said to "Flame On!" (at least gimmie a point for attempt at humor)
Good quote, too many chars. Seriously, the slashdot 120 char limit sucks!
What I want to know is just what the people in this industry did to CmdrTaco that would make him Slashdot their servers twice in a week?
sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.
You would only be contradicting the laws of thermodynamics if you used the power generated to power the CPU.
Karma: Shitty (mostly due to American moderators)
Berto
Okay... I'll flame away. The constant, repeated posting of duplicate stories, often within a day or so of each other demonstrates an unbelievably poor level of editorial oversight. I propose that /. editors lose editorial privilages for 24 hours after each such obvious gaff.
Hey its a duplicate from saturday! Guess I shouldn't post while planning my trek to see LotR tomorrow. Go ahead, flame on.
Please don't flame. This story is about CPU fans.
... And we all know that you shouldn't flame the fans.
"The best part? I became an ordained minister while not wearing pants." -- CleverNickName
Ya know, if you've been around /. long enough, this modded down comment is way funnier than the parent comment that got modded up.
Laugh while you can, monkey boy!
How about in order to be eligible to post on the main page, you have to visit the site at least once a week?
-- 'The' Lord and Master Bitman On High, Master Of All
So I wouldn't want a box designed for natural convection only. But for the user that finds adding a USB peripheral challenging, doesn't need 1GHz, and doesn't want that fan humming, maybe it would work.
It's been done, by apple (who else?). Since the introduction of the models that had slot-loading CD drives in October 1999, iMacs have been fanless, cooled totally by convection currents. Not surprisingly, the iMac was designed for the novice user who doesn't need 1GHz and won't ever be dinking around in the thing's innards, so convection cooling was the way to go.
The G4 Cube was also cooled in this manner, but that model was directed at studio managers and CEO types who likewise wouldn't need expandability.
~Philly
Go CPU! (woof woof woof!)
"I have as much authority as the pope, I just
don't have as many people who believe it" - George Carlin
This concept invokes visions of those palm leaves-attached-to-a-stick-and-a-motor that you see in some classy restaurant type places. Anyone tried miniturizing that and putting it in a PC?
here Goes...
What do you mean LOTR Tommorrow?! Someone with your power should be able to convince their local theaters to show it a day early!
At least some of us were able to do it here in the Twin Cities.
;-P
Hey its a duplicate from saturday! Guess I shouldn't post while planning my trek to see LotR tomorrow.
Perhaps you shouldn't check spelling and capitalization while planning your treks. Do your planning BEFORE you spellcheck.
--
"Outlook not so good." That magic 8-ball knows everything! I'll ask about Exchange Server next.