Over at The Register, Jack Clark writes that Intel’s plans for Exascale continue to hinge on the memory bandwidth and power consumption limitations of today’s DRAM.
When I look at directions we could go with HPC and how memory plays, I see it splitting into two directions: one is where we’re stuck with DRAM and have to live with DRAM a long time,” said Intel’s Alan Gara. “The other is ‘if one of these [new] memory technologies really does evolve, then things change dramatically.” These newer technologies include things like spin-transfer torque memory, nanomechanical RAM, phase-change memory, and other emerging non-volatile memory technologies. All of them hold the promise of a 5 to 10X improvement on DRAM performance, and some have new compute possibilities as well.
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