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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.

0 of 46 fields comparable

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SpecAMD Instinct MI355XApple Mac Studio (M3 Ultra)
Bandwidth GB S—819
Base Price USD—3,999
Bf16 Matrix Pflops Dense2.5—
Bf16 Matrix Pflops Sparse5—
Comparator 5090—5,090
Compute Units256—
Coolingdirect liquid cooling (air-cooled option available)—
CPU Cores 512gb Config—32
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—
GPU Cores 512gb Config—80
HBM (GB)288—
HBM TypeHBM3E—
Helios Gpus PER Rack72—
Launch Date—2025-03-05
M Series Version—3
Memory bandwidth (TB/s)8—
MSRP (USD)↓ better—9,499
Mxfp4 Matrix Pflops10.1—
Mxfp6 Matrix Pflops10.1—
Only 96gb Config From—2026-05-05
Option 512gb Removed—2026-03-05
Pcie GEN5—
Process Node NM3—
Status—discontinued
Status Checked—2026-09-24
Successor—Mac Studio with M5 Max / M5 Ultra (up to 512 GB unified memory)
Successor Cdna Version5—
Successor FamilyAMD Instinct MI400 Series (MI455X)—
Successor Launch2026-07-23—
Successor M5 Ultra Base Price USD—5,499
Successor Mi455x Bandwidth TB S23.3—
Successor Mi455x Hbm4 GB432—
Superseded ON—2026-08-25
TBP Watts1,400—
TDP (W)↓ better—270
Unified Memory Base GB—96
Unified Memory MAX GB—512
Unified Memory MID GB—256
Upgrade 512gb USD—4,000
Upgrade Chip USD—1,500