Memory-optimized beast prioritizes weapon-sim perf over flashy FLOPS figs
So, rather than packing the system full of graphics processors, Crossroads was optimized around memory. As our sibling outletof the Crossroads kit last year, while LANL hasn't revealed much in terms of specifics about the system, it reportedly uses a combination of Intel's Sapphire Rapids Xeon Scalable and high-bandwidth memory Xeon Max processors.
According to LANL, Crossroads should deliver roughly 4x-8x the performance of Trinity. That system, introduced in 2015, is capable of 41.46 petaFLOPS of peak FP64 performance, though in reality the system only managed about half that in the LINPACK benchmark. Crossroads itself is supported by three smaller systems, Rocinante, Razorback, and Tycho, which were named after ships and stations from The Expanse science fiction novels and television series.
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