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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.

Rig A

Frontier (OLCF-5)

HPE / AMD · workstation

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Rig B

AMD Instinct MI355X

AMD · accelerator

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SpecFrontier (OLCF-5)AMD Instinct MI355X
AcceleratorAMD Instinct MI250X—
Bf16 Matrix Pflops Dense—2.5
Bf16 Matrix Pflops Sparse—5
Cabinets74—
Compute Units—256
Cooling—direct liquid cooling (air-cooled option available)
Cores9,066,176—
CPUAMD 3rd Gen EPYC 64C 2GHz—
Form factor—OAM
Fp16 Matrix Pflops Dense—2.5
Fp16 Matrix Pflops Sparse—5
Fp32 Vector Tflops—157.3
Fp64 Matrix Tflops—78.6
FP8 Matrix Pflops Dense—5
FP8 Matrix Pflops Sparse—10.1
HBM (GB)—288
HBM Type—HBM3E
Helios Gpus PER Rack—72
Installation Year2,021—
InterconnectHPE Slingshot-11—
LocationDOE/SC/Oak Ridge National Laboratory—
ManufacturerHPE—
Memory bandwidth (TB/s)—8
ModelHPE Cray EX235a—
Mxfp4 Matrix Pflops—10.1
Mxfp6 Matrix Pflops—10.1
Pcie GEN—5
Power KW24,607—
Process Node NM—3
Rmax Pflops1,353—
Rpeak Pflops2,055.72—
Successor Cdna Version—5
Successor Family—AMD Instinct MI400 Series (MI455X)
Successor Launch—2026-07-23
Successor Mi455x Bandwidth TB S—23.3
Successor Mi455x Hbm4 GB—432
TBP Watts—1,400
Top500 Rank Jun20263—
Top500 Rank Nov20252—