xAI Colossus Memphis Phase 3

Compute

275.8K H100e

Chips

230,000

First operational

Jul 22, 2025

xAI Colossus Memphis Phase 3 is a large GPU cluster operated by xAI, located in the United States, in the private sector. It came online around July 2025.

It is built on 200,000 NVIDIA H100 SXM5 80GB, alongside NVIDIA GB200. That amounts to about 275.8K H100e of AI compute. The cluster draws roughly 352 MW.

Epoch AI rates the certainty of this record as confirmed. we know from earlier that it has 150k H100s and 50k H200s, which makes the total 150k H100s 50k H200s 30k GB200s

Full record

Owner: xAI
Users: xAI
Sector: Private
Status: Existing
Country: United States
Location: 3231 Riverport Rd, Memphis, TN 38109
Primary chip: NVIDIA H100 SXM5 80GB
Primary chip count: 200,000
Secondary chip: NVIDIA GB200
Total AI chips: 230,000
H100 equivalents: 275.8K
8-bit throughput: 5.5×10²⁰ OP/s
Power capacity: 352 MW
First operational: Jul 22, 2025
Certainty: Confirmed