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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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SpecAMD Instinct MI355XCerebras Wafer-Scale Engine 3
Bf16 Matrix Pflops Dense2.5—
Bf16 Matrix Pflops Sparse5—
Compute Units256—
Coolingdirect liquid cooling (air-cooled option available)—
Cores—900,000
CS4 Introduced—2026-08-18
CS4 Wse3 Turbo Count—3
DIE Size MM2—46,225
Fabric Bandwidth Pbit S—214
Form factorOAM—
Fp16 Matrix Pflops Dense2.5—
Fp16 Matrix Pflops Sparse5—
Fp32 Vector Tflops157.3—
Fp64 Matrix Tflops78.6—
FP8 Matrix Pflops Dense5—
FP8 Matrix Pflops Sparse10.1—
HBM (GB)288—
HBM TypeHBM3E—
Helios Gpus PER Rack72—
Memory bandwidth (TB/s)8—
Memory Bandwidth PB S—21
Mxfp4 Matrix Pflops10.1—
Mxfp6 Matrix Pflops10.1—
ON Chip Sram GB—44
Pcie GEN5—
Peak AI Petaflops—125
Process Node—TSMC 5nm
Process Node NM3—
Successor Cdna Version5—
Successor FamilyAMD Instinct MI400 Series (MI455X)—
Successor Launch2026-07-23—
Successor Mi455x Bandwidth TB S23.3—
Successor Mi455x Hbm4 GB432—
TBP Watts1,400—
Transistors Trillion—4
Wse3 Turbo Peak AI Petaflops—250