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MCS · Rigs · Compare

Side-by-side, with the numbers that matter.

Two rigs, one table. Higher numbers win in cobalt; TDP and price flip.

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SpecSambaNova SN40L Reconfigurable Dataflow UnitFrontier (OLCF-5)
Accelerator—AMD Instinct MI250X
Bf16 Tflops PER Socket638—
Cabinets—74
Cores—9,066,176
CPU—AMD 3rd Gen EPYC 64C 2GHz
Current Family ListedSN50, SN40—
DDR Bandwidth GB S200—
Ddr5 Capacity TB1.5—
HBM Bandwidth TB S1.8—
Hbm3 Capacity GB64—
Installation Year—2,021
Interconnect—HPE Slingshot-11
Location—DOE/SC/Oak Ridge National Laboratory
Manufacturer—HPE
Model—HPE Cray EX235a
ON Chip Sram MB520—
Packaging3x CoWoS-S, 2 accelerator dies—
Pattern Compute Units1,040—
Power KW—24,607
Process NodeTSMC 5nm—
Rmax Pflops—1,353
Rpeak Pflops—2,055.72
Status Checked2026-09-24—
SuccessorSN50 (fifth-generation RDU)—
Successor Introduced2026-02-24—
Top500 Rank Jun2026—3
Top500 Rank Nov2025—2