04BBuildout · frontier site· cluster ledger reviewed 2026-10-14
Colossus 2 AI datacenter
SpaceXAI (SpaceX, formerly xAI) · Memphis, Tennessee. The ledger records it as operating, with 946 MW energized of 2 GW planned. Every figure below traces to a dated public source.
Ledger figures
- Operator
- SpaceXAI (SpaceX, formerly xAI)
- Location
- Memphis, Tennessee
- Status
- Operating
- Current power
- 946 MWest — estimated / secondary-source figure
- Planned power
- 2 GWest — estimated / secondary-source figure
- Accelerators
- ~550K GB200/GB300 operating (Sep 2026); +660K GB300 targeted by late Dec 2026
- Announced
- No public date
- First power
- 2025-10
Spans Memphis, TN and Southaven, MS; a third building (projected ~Feb 2027) takes the site toward 2 GW of facility power. Anthropic also contracted GPU capacity here in 2026.
Power figures are IT load where trackers publish it and campus power where only the operator’s headline exists; each source below names its basis. A figure marked est rests on at least one source other than the operator’s own announcement.
Sources behind each figure
- Current power · est ≥946 MW IT (≈1.28 GW facility) at the Jun 2026 observation (tracker estimate) — Epoch AI data-center directory,
- Planned power · est 1,531 MW IT (≈2.07 GW facility) projected once Building 3 completes, ~Feb 2027 (tracker estimate) — Epoch AI data-center directory,
- Accelerators · est 550K operating (110K GB200 + 440K GB300) as of Sep 25, 2026; +660K GB300 targeted by late Dec 2026 — Tom’s Hardware (quoting Elon Musk on X),
- First power · est First ~110K-GB200 (~210 MW) cluster online by the Oct 19, 2025 observation (tracker estimate) — Epoch AI data-center directory,
Background reading: xAI Colossus 2 on AI Wiki. AI Wiki is run by the same team as AI Compute Tracker.