Antminer S21 Hydro
Bitcoin miner from Bitmain. The base machine of the S21 hydro range, without the plus and without the e. The least expensive way into a water loop on this generation.
About the Antminer S21 Hydro
The Antminer S21 Hydro is the base machine of Bitmain's S21 hydro range, without the plus and without the e. It runs at 335 TH/s on 5,360 W, which is 16.0 J/TH, and comes in a single factory version. In efficiency it sits between the S21e Hydro and the S21+ Hydro, and the XP models go further.
It needs three phase power at 380 to 415 V and draws about 128.6 kWh a day per unit. The site provides the liquid cooling loop with manifold plumbing, a dry cooler or water source, plus power cords and a PDU. At about 50 dB the unit itself is quiet, and the operating range is 5 to 45 °C. Each unit measures 410 × 170 × 209 mm and weighs 17.5 kg, the chassis of the S21 XP Hydro and the S21 XP+ Hydro.
Specifications
Manufacturer reference values, confirmed per batch on the quote.
Scope of delivery
- The miner with integrated PSU
- Original manufacturer packaging
- Serial numbers per unit and warranty reference
- Liquid cooling loop
- Dry cooler or water source
- Three phase power
- Manifold plumbing
- Power cords and PDU
Hydro cooling. Far quieter than air cooled machines, with stable chip temperatures even in warm climates; plan the loop before the hardware arrives.
Energy only: 5,360 W rated power, 24 hours, one unit. Cooling overhead and PSU losses not included; no revenue assumptions.
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Read before you buy the Antminer S21 Hydro
The breakeven power price, and why we ask for yours first
Every machine has an electricity price above which it stops making money. Work that number out and most of the hardware decision answers itself.
Hydro miners compared, and what the loop really costs
Water cooled machines hold the efficiency frontier and they are quiet enough to put near people. They also come with a construction project attached, and that is the part to price before the hardware.
Three phase power for a mining site, in plain terms
Most modern miners are three phase machines, and most new sites are wired for something else. This is the vocabulary you need before you talk to an electrician.
Mining containersContainers, hydro racks and cooling, quoted with the machines.Compared with related models
The closest machines by condition, algorithm, manufacturer and cooling.
