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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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RE: The water of life.
By ochadd on 4/9/2008 3:42:21 PM , Rating: 1
After experiencing a waterblock failure first hand I know these guys are risking allot for the improved cooling.

It nearly burned my house down after cooking for hours while away at work. After losing $2k worth of equipment and being reimbursed 20% of the purchase price it would take more than a better OC to get back into it.

The cost of a whole rack of equipment and the lost computing time would add up pretty quick. Might be worth it for 40% cost savings on the HVAC side.

RE: The water of life.
By PrinceGaz on 4/9/2008 3:52:28 PM , Rating: 3
Did you not have the option in the BIOS set to shutdown the system if CPU temperature exceeds whatever amount you felt would never be reached unless there were a problem?

I think I've got mine set so it shuts down if the Athlon 64 X2 processor passes 60C, well within its safe limit but quite a bit below the temperature it ever reaches - with the cooling working normally. If the CPU fan failed, the temperature would start to climb and when it reached 60C the PC would turn itself off. No problem.

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