with IBM Power System AC922 nodes.

Sierra is composed of 4,474 nodes, 4,284 of which are compute nodes. Each node has 256GB of RAM, 44 IBM POWER9 cores spread across two physical sockets, and Four Nvidia Tesla V100 GPUs, each providing 16GB of VRAM. This gives the complete system 8,948 CPUs, 17,896 GPUs, 1.14 PB of RAM, and 286 TB of VRAM.

Sierra has consistently appeared on the Top500

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