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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 MI355XAlibaba Qwen2.5-72B-Instruct (Q4 quant)
Bf16 Matrix Pflops Dense2.5—
Bf16 Matrix Pflops Sparse5—
Compute Units256—
Context Window Tokens K—128
Coolingdirect liquid cooling (air-cooled option available)—
Dual Card Count—2
Dual Card Vram GB—24
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—
GPT Version—5
HBM (GB)288—
HBM TypeHBM3E—
Helios Gpus PER Rack72—
Memory bandwidth (TB/s)8—
Mxfp4 Matrix Pflops10.1—
Mxfp6 Matrix Pflops10.1—
Parameter Count B—72
Pcie GEN5—
Process Node NM3—
Qwen Version—3
Qwen25 72B Instruct—Qwen2.5-72B-Instruct
Qwen25 Version—2.5
Qwen3 Largest Dense Checkpoint B—32
RTX 5090 Pairing Vram GB—32
Status Checked—2026-09-24
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—
Vram Required GB—44