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IBM Hydro Cluster Water Cooling  (Source: IBM)
IBM Power 575 performs at 600 GFlops per node

Computer enthusiasts that overclock their CPUs have known for a long time that liquid cooling has the potential to cool the processor better than air cooling. Liquid cooling in the enthusiast space is common and has even given way in the extreme performance categories to much more exotic means of cooling processors.

In the supercomputer realm companies like IBM have traditionally relied on air cooling for the CPUs via air conditioning for the room the supercomputer is in. IBM introduced its latest supercomputer called the Power 575, which is equipped with IBM’s latest Power6 microprocessor. The Power 575 has moved from air cooling to liquid cooling and thanks to the liquid cooling useing water-chilled copper plates located above each processor, the new supercomputer requires 80% fewer air conditioning units.

The significantly reduced need for air conditioning means that the energy needed to cool the data center can be reduced by 40%. IBM researchers say water can be up to 4,000 times more efficient than air cooling for computer systems.

The Power 575 supercomputer has 448 cores per rack and provides over five times the performance of its predecessor and is three times more energy efficient per rack. Each rack features 14 2U nodes each consisting of 32 4.7GHz cores of Power6 and 3.5TB of memory. Each node is capable of 600 GFlops and is three times more efficient in GFlops per kilowatt than the Power5 air-cooled processors.

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So you don't ever need to change the water?
By AnnihilatorX on 4/9/2008 8:22:34 PM , Rating: 2
There would literally be tonnes and gallons of water there. The water definitely need to keep its quality, even if it's a closed system I assume impurities leak in.

My water cooling set comes with anti-corrosion collant, and that has a life apparently. So in 3 or 4 years I am suppose to change the water.

I wonder if you need to do the same to the super computers that uses water cooling.

RE: So you don't ever need to change the water?
By xsilver on 4/9/2008 9:37:10 PM , Rating: 2
I think a great idea would be to pipe the huge tank on this to the toilets. hmmm... warm water to flush toilets

That way I dont think they would even need radiator fans as the water is getting changed with cold tap water all the time.

By jtemplin on 4/10/2008 12:38:59 AM , Rating: 2
Thats a good idea, but the water coming from the main would be too hard I think. Plus you don't need fluoride in your computer and all that other junk. You would probably want to have a filter between the computer and the main as well as a machine which automatically titrates the desired amount of anti-corrosive and biocidal concentration in the water

By IvanAndreevich on 4/10/2008 3:20:45 AM , Rating: 2
That would be a giant waste of water, and the bill for it would be enormous.

By xsilver on 4/10/2008 8:09:29 AM , Rating: 2
say what?
the bill for flushing toilets is enormous?
do you not flush the toilet at your workplace? :P

Also to the poster above, I think there is no need for that anti-bacterial stuff as its only needed when you have a closed system.
This would be an open system so there is not enough time for bacteria to grow, they would be flushed!
The only problem I can think of is that there needs to be some sort of failsafe if some new kid wants to play a prank and flush all the toilets at once = empty tank = dead server!

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