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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

The Stargate Project

OpenAI / Oracle / SoftBank / MGX · workstation

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Rig B

AMD Instinct MI355X

AMD · accelerator

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0 of 42 fields comparable

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SpecThe Stargate ProjectAMD Instinct MI355X
Abilene Trained ModelGPT-5.5—
Abilene Trained Model Version5.5—
Bf16 Matrix Pflops Dense—2.5
Bf16 Matrix Pflops Sparse—5
Capacity Added Prior 90 Days GW MIN3—
Capacity Added Window Days90—
Capacity Update Date2026-04-29—
Compute Units—256
Cooling—direct liquid cooling (air-cooled option available)
Custom Silicon AnnouncedBroadcom (10 GW)—
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
Memory bandwidth (TB/s)—8
Mxfp4 Matrix Pflops—10.1
Mxfp6 Matrix Pflops—10.1
Oracle Partnership GW5—
PartnersOpenAI, SoftBank, Oracle, MGX—
Pcie GEN—5
Planned Capacity GW 20257—
Planned Chip Count Million2—
Primary Accelerator AnnouncedNVIDIA GB200 (initial Oracle racks)—
Primary SiteAbilene, Texas—
Process Node NM—3
Secondary Accelerator AnnouncedAMD Instinct (up to 6 GW)—
Secured Capacity Commitment Deadline Year2,029—
Secured Capacity Commitment GW10—
Status Checked2026-09-24—
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
Total Planned Investment USD Billion400—