Slashdot Mirror
Tiny Bubbles Key to Cooling Crazy Hot CPUs
Smaz writes "With future CPUs expected to generate as much as four times the heat of today's processors, wicking away that heat remains one of the biggest engineering hurdles in the biz. Researchers at Purdue have developed a pumpless liquid-cooling system that removes nearly six times more heat than existing systems. The trick, it seems, is in the tiny bubbles. From the Science Blog."
I thought that with a properly pressurized closed system that convection and boiling would keep things cool enough. I know this isn't the first silent system, I'm just curious what special benefit the "tiny bubbles" and microchannels provide... unless we are going to another proprietary IBM standard bus.
Food not Bombs is a nice platitude but it breaks down when you notice that the Bombees are usually well fed
This is also why beer is good.
It will be interesting to see if the shock waves from the cavitation (the sudden formation of the tiny bubbles) affects the operation of the chip or erodes the surface, limiting the life.
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
... that the music of Don Ho would ever yield any practical engineering application.
"If you're thinking what I'm thinking, you're right." -
...will be using the descending liquid flow to turn a generator to provide additional electricity.
From this article
Laptop burns boffin's penis
November 22 2002
Doctors are warning that laptop computers may inflict a burn even through clothed skin, after the bizarre case of a Swedish scientist who scorched his penis and testicles while writing a report in his armchair.
The unnamed 50-year-old father of two had balanced the computer on his lap while he wrote the report at home, taking about an hour to do it, according to a letter published in the next issue of the British medical weekly The Lancet.
The following day, he started to develop painful blisters on his foreskin and scrotum, which became infected but eventually cleared up without the need for antibiotics.
Laptop manuals usually advise users not to use the computer while its base is resting directly on exposed skin, as heat can build up if the device is left on for a long time.
In this case, however, the patient had been wearing trousers and underpants.
The tale "should be taken as a serious warning against use of a laptop computer, in a literal sense," said the letter's author, Claes-Goran Ostenson of the department of molecular medicine at Stockholm's Karolinska Institute.
I hope that someday we will be able to put away our fears and prejudices and just laugh at people. - Jack Handey
The Energy Department. In other words, your tax money at work doing something far more useful than blowing the shit out of Iraq. The big bad Federal Government.
and yes, I am an coward, faceless even.
imagining a Lava Lamp mounted to your CPU?
From the Purdue University:
Tiny bubbles are key to liquid-cooled system for future computers
WEST LAFAYETTE, Ind. - Purdue University researchers have made a discovery that may lead to the development of an innovative liquid-cooling system for future computer chips, which are expected to generate four times more heat than today's chips.
Researchers had thought that bubbles might block the circulation of liquid forced to flow through "microchannels" only three times the width of a human hair. Engineers also thought that small electric pumps might be needed to push liquid through the narrow channels, increasing the cost and complexity while decreasing the reliability of new cooling systems for computers.
Purdue researchers, however, have solved both of these potential engineering hurdles, developing a "pumpless" liquid- cooling system that removes nearly six times more heat than existing miniature pumpless liquid-cooling systems, said Issam Mudawar, a professor of mechanical engineering.
Liquid forced through microchannels forms smaller bubbles than expected, Mudawar said he was surprised to learn. Moreover, decreasing the diameter of the microchannels increased the cooling efficiency of the system by causing the liquid to form even smaller bubbles, which is contrary to the expected result.
Because the bubbles are much smaller than the diameter of the microchannels, they flow easily through the channels. The Purdue-developed system does not require a pump because the liquid circulates in a self-sustaining flow in a closed loop that carries heat away from a computer chip.
Findings about the new cooling system are detailed in a research paper appearing in the March issue of IEEE Transactions on Components and Packaging Technologies, published by the Institute of Electrical and Electronics Engineers. The paper was written by Mudawar and graduate student Swaraj Mukherjee.
Innovative cooling systems will be needed in about three years for personal computers expected to contain microprocessor chips that will generate four times more heat than chips in current computers. Whereas current high- performance chips generate about 75 watts per square centimeter, chips in the near future will generate more than 300 watts per square centimeter, Mudawar said.
"Any time you squeeze more circuitry into the same space, you are producing more heat per unit area and per unit volume," he said.
Today's computers use fans and heat sinks containing fins to help cool circuitry. But this technology will not be efficient enough to remove the increasing heat generated by future chips, Mudawar said.
His research team created a liquid-cooling system that uses a closed loop of two vertical, parallel tubes containing a dielectric liquid - or a liquid that does not conduct electricity. The liquid flows through microchannels in a metal plate that is touching the chip. As liquid flows through the channels, it is heated by the chip and begins to boil, producing bubbles of vapor. Because the buoyant vapor bubbles are lighter than the liquid, they rise to the top of the tube, where they are cooled by a fan and condensed back into a liquid. The cool liquid then flows into the parallel tube and descends, creating a self-sustaining flow that eventually re-enters the microchannel plate and starts all over again.
"We were surprised to see that the dielectric liquid forms really miniature bubbles, so they slip through really fast," Mudawar said. "The bubbles don't block the flow, as you would expect."
The researchers found that the system was 5.7 times better at removing heat than existing miniature pumpless liquid- cooling systems.
"This is only a starting point, and much better performance might be possible," Mudawar said.
Future research will focus on testing various designs to see which configurations work best.
"Now that we have a system that we know will work, we are going to test different geometries that will be beneficial to indust
The researchers found that the system was 5.7 times better at removing heat than existing miniature pumpless liquid-cooling systems.
It's misleading to generalize "existing miniature pumpless liquid-cooling systems" to "existing systems", as was done in the discussion header. At least, it made me think article was about a cooling solution six times better than *ALL* existing cooling systems. Of course, this leads one to question how good "existing miniature pumpless liquid-cooling systems" are...
Hail Hail to old Purdue,
All Hail to our old Gold and Black
Hail Hail to old Purdue,
Our friendship may she never lack
Ever gratefull Ever True
May we raise our song a new
Of the days we spent with you
All hail our old purdue
I love when my school shows up on a slashdot post for research it has done!
http://www.purdue.edu/Admissions/
you will hard boil an egg rather then fry it on your P12 256bit quad CPU.
darn, all have to get a new recipe book.
Tiny Bubbles
Running WINE
Make me happy
Make my PC feel fine.
Tiny Bubbles
Make me warm no longer
With a feeling that I'm going to cool you
Till the end of time
So here's to the Boilermakers
And here's to Purdue
But mostly here's to a cooler CPU
Tiny Bubbles
Running WINE
Make me happy
Make my PC feel fine.
Happiness is like peeing yourself. Everybody can see it but only you can feel its warmth.
Bubbles? Bubbles of nothing?
DJCC
Minus the banners (for those that can see them
http://news.uns.purdue.edu/html4ever/030411.Mudaw
I actually submitted this to slashdot back in november:
;-)
2002-11-22 15:19:35 Why Cooling is Important In Laptops! (articles,humor) (rejected)
At least it gets the laugh it deserved several months later
Good quote, too many chars. Seriously, the slashdot 120 char limit sucks!
They mention bubbles in this article - well, it's common knowledge that bubbles in Guinness defy gravity !
So maybe these chips will be served with a Guinness cooling agent ?
A 500 year old cooling method can't be wrong !
I love my chips with Guinness !
Hic, arrrr
A slashdotting - you get the stick first and then the carrot !
I guess that comes from somebody focusing on Intel and co, ignoring Transmeta...
... Microchannel was the way to go.
Hmm, I wonder if any email marketers have considered letting people know about a product like that?
No...that wouldn't happen!
Where does the heat go?
This seems like a nice technology to remove the heat from the CPU, but what I'm always wondering about is, where will the heat actually be dissipated into the environment? At some point, there has to be a heat exchanger where all this heat collected in the tiny bubbles is passed outside the unit. This is going to take a fair amount of space - one of these days we're going to see ads for heat exchangers that take up less space than the "standard" box available from Intel.
I'm looking forward to a Beowolf cluster not only performing amazing calculations but also heating the building it's in.
myke
Mimetics Inc. Twitter
"The trick, it seems, is in the tiny bubbles"
Amazing! That's also the trick behind Dr Pepper!!
Just how do they make them so damn small?
My life is one big siesta in which I'm dreaming I wished my life was one big siesta.
From the same site: Neural biology explains ejaculation
How does the body know it has had an ejaculation? And why does it care? Anatomically, it is more complex than it seems, says the University of Cincinnati scientist who last year identified the spinal cord cells that control ejaculation in rats and the neural pathway by which signals travel between the body's sexual organs to the brain.
Yes but will they keep you from burning your unit ?
No, they'll help it happen faster... No slow heat up of the bottom of the laptop - This heat pump is up to 6 times as efficient as the heat pipe. It'll just get the heat away from the cpu faster, no help in keeping it away from your unit.
To recap - No nude laptopping. It is not allowed.
Just because I doubt myself does not mean I find your position compelling.
Now we know why Intel was so anxious to get their anti-overclocking technology working.
Operator, give me the number for 911!
Well, if you want heterosexual male fantasies, mayhaps you should seek out a Windows forum somewhere.
This site is dedicated to "alternative" software and lifestyles.
(You know, free-as-in-gaymo)
VAPORware!
yeah, had to say it and couldnt find it said with 1 sec search.
world was created 5 seconds before this post as it is.
Tiny Scrubbing Bubbles...
We keep cooling so you don't have to.....
Throwback from some bubble advertisement in the 80's.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
"First things first -- but not necessarily in that order"
-- The Doctor, "Doctor
Try this special secret Flash advertisement blocking technique:
# rm /usr/lib/mozilla/plugins/libflashplayer.so
I have found it is capable of stopping all flash advertisements before they even load.
Remeber, it is a secret. So please don't tell anyone.
Here's a good analysis on the current state of CPU heat, for those of us who need to be brought up-to-date on the subject to understand the benefits of the new technology...
Why do I h8 apple?
Money I owe, money-iy-ay
It's the same principle used in cooling nuclear reactors - deals with the Laminar Flow layer in fluids. Pretty simple actually. The surface area of the bubbles (must be small or they begin to restrict the flow) is much larger than the surface area of the overall fluid. Sounds weird, but it's true.
I looked away as I glanced at the first line and read it as "With future CPUs expected to generate as much as four times the heat of the sun..."
:)
I was going to agree... my t-bird 1.3ghz gets daamn hot.
There one of the cheapest filter methods out there. The bubbles drive the flow through an uptake tube of an already established siphon between the tank and the filter resivoir.
The hardware layout would need to be orientation independant for a laptop though.
No big deal, obviously the guy didn't use his penis much any more if he couldn't feel 3rd degree burns developing on his penis.
"boffin" is the right word.
my karma will be here long after I'm gone
I bet there were countless others that submitted it too, and given that I don't understand why it didn't make it? I'm not grousing, I'm just curious ...
-- (Score:i, Imaginary)
The heat a CPU generates is roughly proportional to how much power it consumes. Power costs money. With the computer power consumption fast increasing, and electricity costs going much the same way, at least in Gray California, I suspect this has to start becoming a major buying decicion factor.
Does anybody have any numbers on current and future power consumption, and what it would cost per year with current or future electricity prices to keep a computer turned on 24/7?
-The chip needs to be at the boiling point of the liquid, maybe not a problem (freon anyone?).
-What happens when the CPU isn't pointing up? (e.g. on a motherboard in a standard case) Will it overheat because the bubbles don't "rise"?
my associative arrays can kick your hash - TCL
So the heat from the CPU creates bubbles in the liquid... Certainly sounds like a Boilermaker to me!
Stop by my site where I write about ERP systems & more
"Scientist Yahoo Serious was quoted as saying: "It's really not all that different from work I did with bubbles on that Einstein flick... in fact, early prototypes of this cooling system even involved some beer I had stashed in a jug during that shoot..."
Since this relies on gas rising while a pool of dielectric fluid boils, I assume there's some air left in the system, right? So, what about when you have your laptop on an agle, and could this work with a traditional tower? It seems that for whatever application you use it in, the cooling unit would always need to be oriented "up".
For those who don't bother to read the article, here's a picture of the thing.
have you been defaced today?
You forgot the addition of plugin.display_plugin_downloader_dialog and setting it to false under about:config
"Honey, come quick, the computer's bubbling. There are tiny bubbles all over the place"
Go Boilers... literally. ;)
Shouldn't there be some ideas to utilize a similar system coupled with a miniature sterling engine to get some of this energy back... regenerative braking is the only cool idea to come out of the automotive industry in the last couple decades of supposed innovation.
Fnord.sig
...if I replace the water in my cooler with root beer, will it cool better?
You can run but you can't hide, except, apparently, along the Afghan-Pakistani border.
AMD stock climbed 37% closing at $9.98.
Tiny Bubbles Key to Cooling Crazy Hot CPUs
I would have thought Reduced Instruction Sets and less transistors would be the "key" to cooling crazy hot CPUs...
If you might want to view Flash on web pages, but don't want them playing their flashy flying wizzing crap as soon as the page loads, check this out for Mozilla, it prevents flash animations from playing until you click on them. It works great, and I wouldn't want to browse without it!
I thought the whole emphasis on CPUs was changing from higher clock speed to lower power usage, even in servers. Google's number one requirement is low power usage in their servers.
I'm sure the average PC in the future is going to be using LESS power than today.
How about lowering the pressure?
I want one. Now. My damn processor stays a nice 130+ degrees. Yay.
The article is here but unfortunatly it's pay per wiew.
The article also mentioned that future (within 2005) CPU's will generate five to ten times more heat.
The feedback mechanism inside this inkjet head included a sensor so the squirt can be directed to the hottest areas. Really cool. No phun intended.
Melius mori in libertate quam vivere in servitute.
I'm going to hold out until the inevitable integration with the advanced chemistry found in my Scrubbing Bubbles(r) Bathroom Cleaner.
Then my PC will be heat AND dust free! Less work for Mom!
As if 80 watts isn't already enough !! For the vast majority of CPU consumers, 1GHz is more than enough. I wish the CPU manufacturers would focus more on power consumption (which generates heat) and less on raw speed. They are starting to do that, but I would like to see them focus even more on that. I am not looking forward to the day when my computer consumes half the elecricity in my house !
Biodiesel : domestic, renewable, clean, and in the fuel tank of my bone stock 2002 New Beetle TDI
At the moment the pentium 4 at 3.06 is the most power hungry pc processor at 82 watt. So future processors will consumate 320 watts? Imagine an office with 10 of those computers. I think it is time for processors with a better ratio of processing power / electric power. And more efficient optimized software that doesn't waste so much clock cycles.
These two points seem very valid.
The first is just a matter of liquid choice. They just pick a proper liquid.
The second point is very important. This system requires the bubbles (produced by boiling) to rise to sort-of pump the liquid. A non-vertical system would not work.
I think this bit is key..
" As liquid flows through the channels, it is heated by the chip and begins to boil, producing bubbles of vapor. Because the buoyant vapor bubbles are lighter than the liquid, they rise to the top of the tube, where they are cooled by a fan and condensed back into a liquid."
If you drop a frog into a pan of boiling water then it will attempt to jump out and save its life. Hoever, if you place a frog into a pan of cool water and then heat to boiling the frog will sit until the end. The same occurs with humans - think about when you try to get into a hot bath - then think about how much hotter you can sustain if you run the hot tap whilst you are in...
Today's computers use fans and heat sinks containing fins to help cool circuitry.
That's the problem with today's technology. We keep using Fish in our hardware. No wonder the experts predicted that the smaller the channel, the less heat that would be dissipated (paraphrasing). The fish they were using would not be able to fit though the small channels, thus causing the channel to be blocked!
It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.
Every comparison in the article was with current liquid systems. How much more efficient would this be than the heatsink/fan cooling my Athlon?
I don't see why there is so much effort on dispersing heat... It seems that the only reason systems have a fan is that it's the cheapest cooling method.
Want silent cooling??? Design a case where the healt-sink goes from the processor, to the outer-shell of the case... Presto, no more restricted airflow, and no fans at all.
Convection works well when there is a large surface area (unlike current CPU heatsinks), and there is little impediment to airflow (unlike current systems).
In fact, you could have some incredibly hot systems if you designed a case with a large, EXTERNAL, healtsink, mounted so the top is flush with the case. It could look like a grill on the top of your case instead of a flat piece of metal, but be connected to the CPU with copper/aluminum.
I've always been wondering why nobody designs computers that conduct the CPU heat outside the case. Anybody have some ideas?
Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
I'll bet Don HO is psyched.
Hey freaks: now you're ju
This explains why the Star Trek control panels are always exploding. It's not that they routed main power through a switch on the panel, it's that the fancy-assed graphical display needed a terahertz-class processor to render the warp field display in real-time. That last Romulan disruptor blast just dislodged the heatsink for a few milliseconds and {poof}.
Parent post is informative, mods!
"Think pot of water for spaghetti before the water really starts boiling... Oh, and I apologize for my horendous spelling but you don't have to spell to run a nuclear reactor."
Homer Simpson, is that you?
Seriously though, this is really a good idea. I almost said it was cool, but, I mean, duh, right?
You are not the customer.
The problem with all these cooling solutions is that unless the final output for the heat is "outside", it's doing nothing but making MY ROOM hotter and hotter. Put an Athlon and a 21" CRT in a room and close the door. It seriously sucks. Having to sit in a sauna to send an email is really ignorant. I dont know what the answer is, but generating 4 times more heat isn't it. I think PC's need the equivalent of a dryer vent you can hook up to suck the hot air outside.
I'm Rick James with mod points biatch!
From the article: ...have solved both of these potential engineering hurdles, developing a "pumpless" liquid-cooling system that removes nearly six times more heat than existing miniature pumpless liquid-cooling systems
And, if I may ask, what is the performance of existing miniature pumpless liquid-cooling systems. I have not seen any in the store lately. Do they perform as well as pump-driven systems (probably not)? Do they perform on par even with fans (maybe not)?
Tor
Tiny Bubbles Key to Cooling Mad Stupid Crazy Hot CPUs
Well, If you use the heat dissipation system in those wifi boxes put out by martian.com, then you could stick em in your floors or walls to heat your house. (As suggested by Bob Cringely).
Or you could build a water heater/home server.
SCO to Hell
this is false:
http://www.snopes.com/critters/wild/frogboil.htm
gradual acclimation to temperature changes is true, but there is a relatively well-defined pain threshold (around 120-125 for humans).
0x0D 0x0A
Those icons on the front page of the Science Blog look familiar.
Cut the power cord off of your toaster and strip the insulation off on the toaster end. Keep the plug on the other end.
Wrap one end around your willy and shove the other up your bum, then plug the cord into the wall.
If this does not work, go to an industrial site and ask them where you can plug into their medium-voltage system.
I mean, their whole goal in life is to add as many fans as possible to something; cpu fans, exhaust fans, backup fans, fans for the fans.
Do you want a zillion computers needing special disposal? Technowaste is a big-enough problem as it is today, lets not RE-introduce a hazardous material that needs to be handled at EOL.
OK thi is just a thought off the top of my head so feel free to shut me up if I talking rubbish. Instead of making CPU's faster why not start looking at ways of creating an SMP system which can handel normal applications thorough something like branch prediction or read-ahead but on a large scale?
I would think that a decent chipset which good inter CPU communication could at least rival say 350% of the same system in a single CPU config. Also wouldn't this just dispearse the heat more?
Then again I could be talking rubbish
Cheap UK and US VPS
That's what they are. Pretty standard effect. I'm guessing (from a scan of the article) that they've managed some magic concerning the microchannel interface, but the meat of the "discovery" seems to have been lost in favor of the amazing new heat-pipe phenomenon, which has only been around for thirty years.
s .html
Here's an example:
http://www.swales.com/products/heatpipe
Is it just my observation, or are there way too many stupid people in the world?
Finally! A dedicated random number generator coprocessor.
The trouble with CPU manufacturers is that they are continuously increasing clockspeed to increase performance. All modern processors use CMOS (complementary metal oxide semiconductor) technology. CMOS is great in that the only time it uses substantial power is when the transistors are switched. Unfortunately, the higher the clockspeed, the more often transistors are switched, and the more power is consumed.
New architectures are needed that can do a ton of work per clock cycle. Then, clockspeeds can be reduced greatly, along with power consumption.
I heard an example one time that the human brain works at like 10Hz, and is capable of like 10^15 operations per second, but uses only 80W of power.
I think late great physicist Richard Feynman drew up some equation to describe this relation, but I'm too lazy to look it up.
Cheers!
"There's been a mistake," said the irritated customer at the return counter. "I said I wanted a compact DISK burner!"
ba dah - ching!
The articles states:
Innovative cooling systems will be needed in about three years for personal computers expected to contain microprocessor chips that will generate four times more heat than chips in current computers. Whereas current high-performance chips generate about 75 watts per square centimeter, chips in the near future will generate more than 300 watts per square centimeter, Mudawar said.
Who can afford the electric bill to run such machines in their homes? I already stress over the few rooms in my house where I use 100 watt light bulbs instead of 60 or 75 watt bulbs. Can you imagine hooking up your shiney new PC in 2006, then getting an $800 electric bill the next month? Man..
I guess powering down your system when not in use will become more common.
Instead of wasting all that energy as a pump, you should try and recapture it as electricity like they're doing on car's braking systems.
God spoke to me
Thanx for the pointer,
myke
Mimetics Inc. Twitter
Are you kidding we could and should cut funding considerably and invest it in the future of our nation, education, the children, science, and engineering. Instead of designing wasy to kill people we should be designing systems to save lives. What do we need new nuclear weapons to beat a dictator. hell if they cut the budget by 70-100 billion, cut the tax rebates we could afford the worlds best public education system, and keep inportant reasearch on say alternative energy. Terrorism is a fight not against a target, the Soviets and now Russians found this out the hard way, they used their massive millitary and just killed tons of people they believed were terrorists or supporters in afganistan and chechnya. It just bred more terrorism. We could have prevented september 11, but we were too disorganized and mismanged to do so, none of the 19 hijackers were allowed to be here but it did not stop them, we knew where they were they were flagged by the FBI, flight school instructors, and were being followed by israeli agents. We were warned about these people and the big talk about september 2001 by Italy, Israel, Russia, Egypt, Afgani leader Mousoud, and others. We not only let them stay in the country but did not survellence them and then let them get on planes with weapons. That tells me we need to improve our alert system not OUR MILLITARY.
Welfare is what we do anyway but for rich people it is called a tax cut, just as affirmative action is called legacy for the rich people.
You got it wrong, the bubbles have a very low heat capacity themselves, it is the formation of the bubbles that bleeds the heat out of the system, the heat of vaporization is enormous compared to the heat capacity of the vapor form for every fluid I have ever heard of... Then the bubbles, now buoyant, float off with lots of heat stored up, they then condense returning their heat to a more traditional, but much larger compared to the chip, heat sink, and the liquid returns to the cycle to vaporize once again...
BTW the flow is laminar, you got that right, but a turbulent flow would actually be more effective, you just can't get a turbulent flow in such a small channel, remember the Reynolds number has the length scale in the numerator... micro-channels will never have turbulent flow with any fluid that does not have a viscosity approaching zero
"I'll have a Guinness, no wait, make that a Coors Light" -Grad student I work with, who shall remain anonymous...
what in the world do you think anybody needs a CPU consuming 200 watts of power for? you're forgetting that CPUs as fast and faster than today's power hungry desktops can also be made in the future that draw *less* power and generate *less* heat. that's the direction things will go in the long term unless you listen to Intel marketdroids trying to tell you that you need to be able to compress six HDTV streams in real time from your desktop computer or you're a looser.
I don't know if anyone's mentioned this yet... but couldn't this be applied to nuclear reactors, where large volumes of water are used to cool down the reactor? Just a thought. It would help to prevent thermal pollution in rivers/lakes/etc...
It seems to me that the container of water (or whatever liquid) would have to be placed vertically over the CPU, which means that the CPU would have to be horzontal. Does this signal a change back to horizontal PC cases?
They need the computer playing the Mp3 song "Tiny Bubbles."
*singing* Bubbles... Tiny Bubbles... make me happy...
~ kjrose
From what my university course taught me, CPU power is composed of 2 factors: dynamic power and static power, where dynamic power is dependent on clock speed and the other is independent of the clock speed. But dynamic power itself is the sum of the switching power (to charge up the transistors) and short circuit power (that split fraction of a second when both transistors are on, causing power to leak through). Both of these factors are directly proportional to the activity factor of the signal (the probability of a signal chaning from 1-to-0 or 0-to-1) The one signal that changes 100% of the time is the system clock. To distribute this one signal to all the individual components of the chip, a lot of power is wasted on generating the clock tree. Maybe we should seriously consider reviving the asynchronous CPU design. This would at least minimize the amount of signal activity. Besides, the faster the processor gets, the more time it spends in the NO_OP state, waiting for data to process. I say we should stop focusing on pumping higher clock rates and focus on other components that ARE TRULY THE BOTTLENECK. eg. memory and storage??? Or even use a different transistor technology, e.g. a CMOS transistor that recycles its charge to power other transistors?
I know a big redesign of pc hardware will have to happen for this, but hey what ever happened to prototypes and proof of concept models. Yes all my assumptions are just that, assumptions.
=If life was easy, i would be out of a job=
a while back ... actually building large farms into unuseable spaces in large buildings in exchange for some winter heating .... it's a non-simple problem - you have to be able to handle what happens when a box toasts itself and pumps the toxic fumes into the air conditioning system - requires a lot more support equipment that you might thinl
actually, simulations were done about 2 years ago, it was posted on slashdot I believe...
the bubbles on the outside DO go down (how is that defying gravity, by the way?)
All the rising bubbles towards the center end up creating a downward flow at the edge of the glass, where there is little resistance to the bubbles flowing downwards.. so they do. Look even closer.
Tiny bubbles?! That's your answer to everything.
I can't believe that TamMan2000 got a 2 for a simple and correct explanation of the phenomenon, and a couple of guys for a 4 and 5 for spewing some "I heard something dunno what really but it makes sense". Says a lot about the ability of the moderators to detect bullshit, huh? Strangely sad...
Cheers,
e.
Four times the heat of today's proc's??? Let's see 84 watts (P4 3.06GHz) X 4 == 336 watts?!? No friggin way, there is no way anyone is going to pay for the costs of running a machine like this... this doesn't even take into consideration the rest of the system!
This is the kind of thing that just outrages me, I think what should be perfected are efforts like the VIA CPU's or the Crusoe (ugh). This brute force mentality in CPU's and Video cards is getting ridiculous. Things need to change in a big way, and I hope that they start soon because I'm not buying or running a 1500 watt powersupply 24/7. I don't care how many FPS it can push in Quake III, hell California alone would be under blackout conditions forever if we start seeing CPU's like this.
www.GamezCore.com For Hardcore PS2 Gamerz : By Hardcore PS2 Gamerz
OMG, now THAT was funny!!!
Somebody toss that AC a mod point or two.
Nothing more fearsome than
Great, now sell me a DIY kit so I can tame this Athlon T-Bird block heater. 50 degrees idle with a 7000-rpm fan.. it's insane!
-Billco, Fnarg.com
For all the non-Microsoft folks out there:
Tiny Bubbles,
...
Running Xine,
Make PC happy,
Make PC fine
(Cue the large beast swallowing the poster in a Monty-Pythonesque cartoon sequence.)
"Learning is not compulsory... neither is survival."
--Dr.W.Edwards Deming
I fail to see how cavitation applies. The phenomena here is akin to boiling, hence the pressure inside the bubble is sufficient to prevent the collapse of the bubble.
With cavitation, the pressure inside of the bubble is almost a vacuume. The shock wave is due to the collapse bubble.
How many seconds are there in a year? If I tell you there are
3.155 x 10^7, you won't even try to remember it. On the other hand,
who could forget that, to within half a percent, pi seconds is a
nanocentury.
-- Tom Duff, Bell Labs
- this post brought to you by the Automated Last Post Generator...