IBM Water-Cools 3D Multi-Core Chip Stacks 170
An anonymous reader writes "Water cooling will enable multi-core processors to be stacked into 3D cubes, according to IBM's Zurich Research Laboratory which is demonstrating three-dimensional chip stacks. By stacking memory chips between processor cores IBM plans to multiply interconnections by 100 times while reducing their feature size tenfold. To cool the stack at a rate of 180 watts per layer, water flows down 50-micron channels between the stacked chips. Earlier this year, the same group described a copper-plate water cooling method for IBM's Hydro-Cluster supercomputer. The Zurich team predicts high-end IBM multicore computers will migrate from the copper-plate water-cooling-method to the 3-D chip-stack in five to 10 years." Reader Lilith's Heart-shape adds a link to the BBC's article on these internally-cooled chips.
3D cubes are nice, I guess (Score:5, Funny)
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If your brain thinks the words on that website make any kind of logical sense, then I don't think you'd be capable of learning how to use a computer well enough to manage a website, so I don't think the author is a tr
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But the question is.... (Score:5, Funny)
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He's still working on that one rock problem, though...
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Hmmm....no wonder religions are so wacky and bug-ridden. It all makes sense now!
Maybe the next service pack will patch that pesky 'fundamentalists try to take over all system resources and processes' bug.
my favorite (Score:2, Funny)
Sunshine (Score:1)
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When will water cooling be feasible for ME? (Score:4, Insightful)
And is stacking the chips better than laying them flat and in a strip (like Pentium M)?
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Sure. The interconnects could be shorter and thus impose much less lag. Core one wouldn't need to go through core two to talk to core three, etc.
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Water cooling wasn't invented by overclockers. Cray used it in many of their production systems in the 70s and 80s and its use with CPUs goes further back than that.
The stack of chips is to increase the connectivity between the mul
Electrolysis (Score:5, Interesting)
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If the inside of the system is all made of one material couldn't you just put in deionized water and hope for the best? Copper, silver, and silicon are pretty water-resistant when there isn't anything in there with them to catalyze the reaction.
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I once saw a demonstration (mid 80's, I think), on an exhibition, of a water purifying system. The demo consisted of a tank of water with in it a playing television. The backside was removed to demonstrate that all the components where effectively submerged under water.
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Yeah, DI water doesn't conduct electricity very well at all. It also has a pretty high dielectric constant of about 80. Unfortunately it becomes a pretty good conductor once enough ions leak into it. Was the purifying system on while the demo was running?
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Yes, of course. I think that was the whole purpose of the demo.
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I'm running Windows ME, so yes.
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You can only hope. If the heat block attached to the CPU has frozen water, it'll end up absorbing a lot of it before it melts to liquid. Water has a very high specific heat.
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This will never work (Score:4, Funny)
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Moderators are on crack this morning, again.
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What we need... (Score:2)
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moderating "funny" raises post score but not karma providing opportunity for karma loss.
if you think "funny" is worth karma then you mod "insightful" or "interesting" or whatever depending on how quirky you're feeling that day. that way the user doesn't ever lose karma for being funny unless they're at the karma kap - where in practicality it no longer matters because if you got there, you can probably get there again just fine and you can afford to lose five points of karma. (It's when there's a modding w
180 Watts per layer (Score:2, Informative)
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Besides, this is not IBM's first rodeo. I imagine that they might have put just a little bit of thought into this.
3D CPU structure (Score:3, Interesting)
Yes, that was God's idea... (Score:2)
Great minds think alike.
Upgrades to cotrol systems needed (Score:3, Informative)
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I don't understand what you're asking for. Why should the processor care if the pump is running, if it's still cool. If it's too hot it shuts itself off. If the chip gets damaged, the temp cap was too high.
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You mean, like this [jupiterresearch.com]? More likely they'd use something like commercial antifreeze solutions seen in vehicle radiators. But you still need to maintain the fluid (draining, replacing and what not.)
Next up, oil changes for your PC (cue stupid car analogies).
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Wanders off to get more coffee muttering about the lack of an edit function in slashcode.
Everything that's old is new again (Score:2)
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http://www.spikynorman.dsl.pipex.com/CrayWWWStuff/Criscan/Cray2cascade.jpg [pipex.com]
http://en.wikipedia.org/wiki/Image:Cray2.jpg [wikipedia.org]
Not only was it water cooled, but I think the encasement was designed by DEVO.
Risky (Score:2, Funny)
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Imagine the mistakes of the future (Score:3, Funny)
Peltier-Seebeck (Score:2)
P.S. (Score:2)
Like I said, IANAE.
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Again? (Score:2)
IBM have done this before (Score:3, Insightful)
You want to drive bipolar chips fast, you apply more power. And end up with a piece of silicon dissipating way more heat per unit area than an electric fire. Mind you, so do Athlons.
Multicore resource portal (Score:2, Informative)
plumbing always leaks (Score:2)
plumbing always leaks eventually - what a mess - my system melted down, and there's coolant all over the cpu -- blech.
CMOS = Power Efficient??? (Score:2)
Does anyone remember the good old days when Metal Gate CMOS represented a power efficient process? We have went from CMOS devices consuming milliwatts and microwatts to processors with a 125W+ Total Power Dissipation. This announcement is talking about 180 Watts per layer!
How long will it be before my computer heats my house while I browse the internet? When does the first combined datacenter and heating cogeneration system get installed?
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For home PC's, I think power consumption has hit the ceiling already. Power isn't getting any cheaper, and "green" is trendy.
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correct. PC builders are limited to what a single wallplug can produce. 110AC at ~10A is all you're getting.
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The problem with high total power dissipation is the result of several interrelated trends, all of which can be related to Moore's Law. More transistors got crammed onto a single chip (a linear increase in power dissipation
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Cray? (Score:2)
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What about water damage? (Score:2)
Water Makes Sense (Score:2)
"Welcome to Jiffy-stop. It's time for a power-flush and fill for your supercomputer. That'll be $19.95 with the coupon from Sunday's paper."
water? (Score:2)
I found a picture of the chip! (Score:2, Funny)
Alcohol cooling is a bad idea. (Score:2)
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you just need to use more of it to ensure it doesnt boil dry.
Basic Physics of Thermoconduction (Score:5, Informative)
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Of course, all of this is assuming this is some extremely pure water. Otherwise fouling will occur, and in 50 micron tubes I'm fairly certain it will be hard to clean.
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Water cooling has been used in HPC since the 60s. I imagine there's a good chance that these engineers know what they're doing.
Also, 50 microns isn't a "few molecules thick." A dust mite is about 200 microns across. You have microns and nanometers confused.
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Yes watercooling DOES work, and work well. The probelem is gettign enough heat to penetrate the water and be absorbed, but at the same time not boil. Doing so would require large volues of water to penetrate the chip. Most water cooling blocks run a dozen or more gallons per hour. Getting that much water into 50 micron tubes is going to be a problem in sufficient volmes
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Re:Alcohol cooling is a bad idea. (Score:5, Informative)
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It works, but is one hell of a fire hazard.
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It's quite the opposite (Score:4, Informative)
Actually boiling removes much more heat than conduction. This is the principle used in heat pipes [wikipedia.org], where you want a low boiling temperature, because that will be the temperature in the hot side.
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Difference with heat pipe (Score:2)
- For phase change to be efficient, you need a liquid with a high latent heat (once you reach the boiling point temperature you still need to put a lot of energy inside the liquid to help transform it from liquid to gaz).
Alcohol's is bad. Water's is better.
- Heat pipe function at a very low pressure, and the gaz flows freely in those circumstance.
Meanwhile, with water-cooling if some small bubble forms in the 50 micrometer tubes, they are going to increase the resistance and
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The boiling point of most alcohols is between 60 and 80 degrees Celsius, as opposed to water's boiling point of 100 degrees Celsius.
Most alcohols? Or maybe just two: at atmospheric pressure methanol boils at 64.7 C and ethanol at 78 C, but here are some of the others, all with higher boiling points:
tert-butanol 82.4 C
2-propanol 82.7 C
2-methyl-2-propanol 83 C
2-butanol 94 C
1-propanol 97 C
2-methyl-2-butanol 102 C
2-methyl-1-propanol 108 C
1-butanol 117.7 C
2-methoxyethanol 124 C
3-methyl-1-butanol 130 C
2-hexanol 136 C
1-pentanol 138 C
1-hexanol 151.4 C
2-butoxyethanol 171 C
1-heptanol 176 C
1-octanol 195 C
1-nonano
Somewhere... (Score:3, Funny)
Somewhere there's a geek who has already accomplished this goal. He's using it to run Crysis at 4800x3600 with full detail, at 1600 frames per second, and no matter who he shows it off to, he still can't get laid.
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