Friday, December 05, 2014

IARPA develops Josephson junction cryogenic supercomputer

Studies indicate that superconducting supercomputers may be capable of 1 PFLOP/s for about 25 kW , including the cryogenic cooler. Proof at smaller scales is an essential first step before any attempt to build a supercomputer.  Single flux quantum (SFQ) logic circuits have no static power dissipation, and new energy efficient cryogenic memory ideas allow operation of memory and logic within the cold environment.
 Primary study also suggested that superconducting logic speed can stretch up to 770 GHz and deliver around 100 petaflops of performance, while consuming only 200 kilowatts of power. That is some 1000 times more energy efficient than the state of art CMOS supercomputer.

99% BAD HARDWARE WEEK:  Josephson junction consume only 1aJ of energy .
1018 switching of them at the same time consume per second 1 Watt. One billion of supercomputing chips thus consume only 1W. Finally, no more dark silicon problem :)  Oh, what about 200 KW mentioned consumption above ? Well, that is consumption of cryogenic refrigator. You can't miss it, isn't it ?
1 billion chips each able 100 GFlops means performance well above 1 Exaflops.

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