NERSCPowering Scientific Discovery Since 1974

Configuration

Hopper is NERSC's first peta-flop system, a Cray XE6, with a peak performance of 1.28 Petaflops/sec, 153,216 compute cores for running scientific applications, 217 Terabytes of memory, and 2 Petabytes of online disk storage.

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Compute Nodes

Hopper has 6,384 compute nodes made up of 2 twelve-core AMD 'MagnyCours'. Read More »

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Login Nodes

When you ssh to hopper.nersc.gov, you are connecting to a "login node." Read More »

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Interconnect

A description of the custom Cray-designed network that Hopper uses for inter-node communication. Read More »

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Support Nodes

A description of other kinds of nodes included in Hopper for job launch, file systems, networking, and other services. Read More »

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System Diagram

Diagram of I/O architecture on Hopper Read More »