Sabey SDC Austin Campus
Proposed size
84 MW
Buildings
2
Building area
430,000 sq ft
Cooling
Liquid cooling (primary) + air cooling
Developer
Sabey Data Centers
Sabey Data Centers redeveloped the former Sears call center site in Round Rock into a high-density data center campus. Building A (213,000 sq ft, ~30 MW) completed fall 2024 and was selected by the Texas Advanced Computing Center (TACC) to house its Horizon AI supercomputer. Building B (54 MW, liquid-cooling-ready) broke ground mid-2025 with first capacity available Q3 2027. Full campus will reach 84 MW and 430,000 sq ft.
Water Impact
Daily water use (estimated range)
50 – 500 gal/day
Water returned per day
None reported
Per City of Round Rock monitoring confirmed ~2 million gallons/year (~5,500 gal/day) for Building A. 86% of deployments liquid-cooled per Sabey. Actual significantly lower than LBNL evaporative benchmark., based on City of Round Rock monitoring data per roundrocktexas.gov; Sabey press releases confirm liquid-cooled design.
vs. 5M gal/day (typical 400 MW facility)
The higher estimate is equivalent to the daily water use of approximately 5 households. San Marcos has approximately 25,000 households.
- Water intake
- 50 – 500 gal/day
- Lost to evaporation
- 100%
- Returned to system
- 0% (None reported)
Direct water figures are estimates from permit applications and developer disclosures. Indirect (power generation) figures are calculated estimates. Actual water use depends on technology choices, operating capacity, and weather conditions.
Location
Address: 1300 Louis Henna Blvd, Round Rock, Williamson County, TX
Water source: City of Round Rock Water (Colorado River / LCRA basin)
Infrastructure
- Water provider
- City of Round Rock Water
- Power provider
- ERCOT / Oncor
Coming online — watch for expansion applications and compliance
Expansion applications go through the same permit process as the original project. If actual water use already exceeds permitted projections, that's a documented basis for opposing an expansion — or renegotiating conditions.
Timeline
July 29, 2025
Sabey announces Building B — 54 MW expansion, construction underway
Sabey Data Centers announced the launch of Building B at its SDC Austin Campus, a 54 MW liquid-cooling-ready expansion. Construction was already underway at announcement, with the first 18 MW expected to be Ready for Service in Q3 2027. The full campus will reach 84 MW and 430,000 sq ft.
Source →(opens in new tab)October 17, 2024
Building A completed — Sabey Round Rock campus reaches operational status
Sabey Data Centers announced completion of Building A at its Round Rock campus, a 213,000-sq-ft, ~30 MW liquid-cooled facility. City of Round Rock monitoring confirmed approximately 2 million gallons per year (~5,500 gal/day) of water use for Building A — roughly equivalent to 15 homes annually.
Source →(opens in new tab)August 23, 2024
TACC selects Sabey Round Rock as colocation home for Horizon supercomputer
The Texas Advanced Computing Center (TACC) at UT Austin announced it selected Sabey Data Centers' Round Rock campus as the colocation site for its next-generation Horizon AI supercomputer. The partnership elevates the strategic profile of the campus, anchoring it as a publicly funded research computing resource.
Source →(opens in new tab)July 20, 2022
Sabey breaks ground on Round Rock campus at 1300 Louis Henna Blvd
Sabey Data Centers held a groundbreaking ceremony on July 20, 2022 for its 40-acre data center campus at 1300 Louis Henna Blvd in Round Rock, attended by City of Round Rock officials and Round Rock Chamber representatives. Building A (213,000 sq ft, ~30 MW) was targeted for Q1 2023 delivery, though completion ultimately occurred in fall 2024.
Source →(opens in new tab)April 18, 2022
Sabey announces 72 MW Round Rock campus, site preparation begins
Sabey Data Centers announced its entry into the Austin market with a two-building, 40-acre, 72 MW data center campus at 1300 Louis Henna Blvd (the former Sears Teleserv call center site) in Round Rock. Site preparation had commenced, with groundbreaking targeted for June 2022 and a Ready for Service date of Q1 2023.
Source →(opens in new tab)
Sources
- 1. Sabey Data Centers Completes Construction at Austin, Texas Data Center Site — Business Wire, 2024-10-17. Link →(opens in new tab)
- 2. TACC Selects Sabey Data Centers in Round Rock as Colocation Partner for New Supercomputer — TACC / UT Austin, 2024-08-23. Link →(opens in new tab)
- 3. Sabey Data Centers to expand campus in Round Rock — Community Impact, 2025-08-05. Link →(opens in new tab)
- 4. SDC Announces Launch of Austin Building B — Sabey Data Centers, 2025-07-29. Link →(opens in new tab)
Community Notes
TACC colocation partnership raises this campus's strategic significance — a public university supercomputer anchors hyperscale demand here. Liquid-cooling dominance (86% of deployments) reduces open-loop water consumption versus traditional evaporative designs. City of Round Rock monitoring confirmed Building A uses approximately 2 million gallons per year (~5,500 gallons per day) — equivalent to roughly 15 single-family homes at typical residential rates.