Knights Landing contains 76 cores, but only 72 will be activated

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POSTER: computer news   ||   KNIGHTS LANDING CONTAINS 76 CORES, BUT ONLY 72 WILL BE ACTIVATED	DATE:2015-08-27
Computing Accelerators Intel Xeon Phi - Knights Landing are designed as a 76-core.  In practice, the level of defects in the production of 14-nm-making was quite high, which, incidentally, has delayed the appearance of the commercial version in time.  Instead in the second half of the year, output of commercial audits crystals (B0, B1, and C0) will begin later this year or early next. Commercial versions  Knights Landing will be held at 72   core architecture significantly modified Intel Silvermont.  For example, each core can  processed simultaneously  four computational thread which gives a maximum load of 288 threads per accelerator.  Thus, performance per watt is growing at impressive rates.  Peak performance for Knights Landing operations with double precision exceed 3 teraflops, and is 6 higher than the single- teraflops. Among the first comparative tests resulted in Knights Landing.  At the conference, Hot Interconnects Symposium 2015 were shown slides, according to which the new 200-watt bypasses a bunch of pairs of processors Xeon E5-2697 v3 (28 cores, 56 threads, 2 x 145 W) by between 65% to 90%.   Solutions based accelerators Knights Landing will be released in three versions.  Two of them will be a separate chip (interface Omni-Path or without it), and one - this adapter with PCI Express bus without interface Omni-Path.  Thus, the latest bus Omni-Path, provides a line speed of 100 Gb / s.  Below you can see in the photo processor Knights Landing with the heat-spreading lid where the bus controller Omni-Path looks like the exhaust .  To the processor controller Omni-Path is connected with two ports PCI Express 3.0 x16. Also  Intel said that the memory MCDRAM (Micron HMC) can operate in three modes.  Just next to the CPU will be set  8 or 16 GB MCDRAM.  The processor can be used as a cache MCDRAM to access the system DDR4 memory capacity of up to 384 GB.  It can also access memory MCDRAM as system memory along with DDR4, which speeds up the computation.  The third mode - a mixed (cache / system memory), what can be allocated 25-50% capacity MCDRAM. Related Products :

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