GreenSquare brings reworked 1995 Sydney data centre online for Sharon AI GPUs

GreenSquare has brought the first stage of SYD1, its Norwest Business Park campus in Western Sydney, into operation. The company converted a building that first opened as a data centre in 1995, finishing the job in eight months and fitting it out for dense AI workloads with liquid-to-chip cooling.

Sharon AI, a Nasdaq-listed NVIDIA Cloud Partner, is the first customer and plans to install approximately 8,200 NVIDIA Blackwell Ultra GPUs on site. GreenSquare calls it a significant deployment of NVIDIA HGX B300 infrastructure in Australia. Sharon AI already uses Equinix in Sydney and NextDC in Melbourne, is also working with CDC, and has said it has 212MW of capacity online or in development.

Rather than demolish the building, GreenSquare kept the slab and much of the structure. Moving the data halls to the ground floor meant the building could carry high-density compute without added structural reinforcement. GreenSquare said IT capacity within the original footprint rose by 275 per cent. Chief Technology Officer Joshua Martens said GreenSquare "saw an opportunity to give a 30-year-old data centre a completely new purpose".

GreenSquare projects a power usage effectiveness of 1.20 for SYD1, and potable water usage effectiveness below 0.1 litres per kilowatt-hour. The NSW Government guideline benchmarks for those measures are 1.25 and 1.0. A closed-loop system took the place of the original cooling towers and avoids evaporative cooling for about 96 per cent of the year. Rainwater harvesting is expected to cover about 10 per cent of annual cooling water demand.

Engineering consultants TTW carried out an independent assessment and concluded that 92 per cent of the existing structural carbon was retained. According to GreenSquare, reuse plus low-carbon concrete cut structural upfront carbon by 76 per cent per square metre and carbon by 93 per cent per kilowatt of IT capacity, against a new build.

Main works started in February 2026, peaking at around 400 people on site, and the project logged more than 350,000 hours without a lost-time injury. Erilyan constructed and delivered the facility, while Fredon handled electrical infrastructure and commissioning.

The NSW Government's Investment Delivery Authority has endorsed support for a proposed 80 MW second stage, which would take the site to 110MW. GreenSquare is backed by programs managed by Partners Group, which acquired it in March 2025, and is planning a large-scale development in Melbourne after dropping its Perth project earlier this year.