Product Overview

The Bitmain Antminer S21 XP Hydro 473T is a high-output hydro-cooled Bitcoin (BTC) SHA-256 ASIC miner delivering 473 TH/s at approximately 5,676W. As a hydro-cooled variant of the S21 XP platform, the S21 XP Hydro 473T enables far higher hashrate per unit than air-cooled equivalents by using liquid cooling to manage the substantially elevated thermal load — achieving hashrates that would cause air-cooled hardware to overheat.

The hydro-cooling system replaces the conventional high-speed fan array with a liquid-cooled heat exchanger attached directly to the ASIC boards. Coolant fluid circulates through the miner’s internal manifold, absorbing heat from the chips, and exhausts it via a closed-loop cooling system outside the unit. This enables substantially higher chip densities and clock speeds — explaining the jump from the air-cooled S21 XP 270Th to the hydro-cooled S21 XP Hydro’s 473 TH/s.

For South African operators considering the S21 XP Hydro 473T, the key consideration beyond the standard electrical infrastructure requirements is the hydro-cooling loop installation. A properly designed coolant loop — including a dry cooler or cooling tower, circulation pumps, piping, and heat exchangers — is a significant infrastructure investment beyond the miner hardware itself. This makes hydro-cooled mining most practical for large-scale commercial operations with dedicated facilities.

Key Features

• 473 TH/s SHA-256 Hashrate (±3%): Exceptional per-unit Bitcoin mining hashrate, only achievable through liquid cooling that removes the thermal constraints of air-cooled designs.
• Hydro-Cooled Architecture: Liquid cooling enables higher chip performance density than air cooling permits. Requires a closed-loop coolant infrastructure outside the unit.
• ~12 J/TH Power Efficiency: Leading efficiency for a high-hashrate Bitcoin miner — the hydro-cooling system allows chips to run at optimal efficiency without the thermal throttling that constrains air-cooled equivalents at high hashrates.
• 5,676W Power Consumption: High absolute power draw requiring substantial electrical infrastructure beyond the miner itself.
• Near-Silent Operation: Without high-speed fans, hydro-cooled miners operate very quietly — a notable benefit for facilities where noise is a concern.
• S21 XP Platform: Built on Bitmain’s advanced 4nm ASIC chip architecture, delivering industry-leading SHA-256 efficiency.
• Standard Ethernet Management: RJ45 connectivity with web-based management compatible with major pool and monitoring platforms.

Technical Specifications

• Algorithm: SHA-256
• Supported Coins: Bitcoin (BTC), Bitcoin Cash (BCH), and other SHA-256 cryptocurrencies
• Hashrate: 473 TH/s (±3%)
• Power Consumption: ~5,676W (±5%)
• Power Efficiency: ~12 J/TH
• Cooling Type: Hydro-cooled (liquid cooling loop required)
• Noise Level: Near-silent (no fans)
• Input Voltage: 200–240V AC, 50/60 Hz
• Networking: 1× RJ45 Ethernet
• Operating Temperature: 0°C to 40°C (coolant inlet temperature requirements apply)
• Power Supply: Confirm inclusion at time of purchase

Power & Installation Notes

The Antminer S21 XP Hydro 473T draws approximately 5,676W continuously — well above the 32A single-phase circuit threshold. In South Africa, this unit requires a dedicated high-amperage circuit (minimum 40A, ideally three-phase supply for multi-unit installations). All installation must comply with SANS 10142 and be certified by a registered electrician.

Beyond the electrical requirements, the hydro-cooling infrastructure is the defining installation requirement for this unit. A complete hydro-cooling loop includes: a circulation pump, coolant piping, heat exchangers or manifolds, and a dry cooler or cooling tower to reject heat externally. The complexity and cost of this infrastructure means the S21 XP Hydro is most practical for large-scale, purpose-built mining facilities rather than smaller operations.

South Africa’s 230V / 50Hz supply is compatible with the unit’s input specification, but the absolute power draw at 5,676W requires substantial electrical infrastructure regardless of voltage. Load shedding at this power level cannot be managed with any residential or light commercial inverter system.

Electricity Cost Context — South Africa

At R2.80/kWh reference tariff, the estimated monthly electricity cost is:

(5,676 ÷ 1,000) × 24 × 30 × 2.80 = R11,441.66 per month

This is an operating cost estimate only. Despite the high absolute cost, the S21 XP Hydro’s leading ~12 J/TH efficiency means the electricity cost per TH/s is lower than less efficient miners. At commercial electricity tariffs, the hydro-cooled design can offer meaningful operating cost advantages versus air-cooled alternatives at equivalent total hashrate deployments.

Ideal Use Cases

• Large-scale commercial Bitcoin mining farms: The S21 XP Hydro 473T is designed for large-scale commercial operations with purpose-built hydro-cooling infrastructure, industrial power supply, and professional facility management.
• Hashrate maximisation per physical space: For operations where data centre space is the primary constraint, hydro-cooled miners like the S21 XP Hydro deliver more TH/s per square metre than air-cooled alternatives.
• Noise-sensitive deployments: The near-silent operation of hydro-cooled miners makes them suitable for locations where industrial-fan ASIC noise is problematic.
• Commercial renewable energy mining: South African operations with access to cost-effective grid, wheeling, or PPA electricity can leverage the hydro-cooled platform’s efficiency to maximise Bitcoin output per kWh consumed.

Frequently Asked Questions

Does the S21 XP Hydro require special plumbing?
Yes. A complete hydro-cooling loop is required — circulation pumps, coolant piping, heat exchangers, and a dry cooler or cooling tower to reject heat. This infrastructure is separate from the miner hardware and represents a significant installation project. Consult a specialist hydro-cooling integrator before purchasing.

Does it work on South African power?
Yes, the unit’s voltage specification is compatible with South Africa’s 230V / 50Hz supply, but the 5,676W draw requires substantial dedicated electrical infrastructure beyond a standard 32A circuit. Three-phase supply and certified electrician installation are recommended.

What coolant type is required?
Confirm coolant specifications (type, flow rate, inlet temperature range) with Bitmain’s technical documentation or your supplier at time of purchase. Most hydro-cooled miners specify deionised or distilled water with specific inhibitor treatment.

Is it louder than air-cooled miners?
No — significantly quieter. Without high-speed fans, the S21 XP Hydro operates near-silently. Noise from the external cooling loop (pumps, fans on dry cooler) depends on your cooling infrastructure design.

Is this suitable for a home mining setup?
No. The hydro-cooling infrastructure requirement, high power draw, and complexity make the S21 XP Hydro 473T exclusively suited to large-scale commercial operations with purpose-built facilities.

What’s Included

• 1× Bitmain Antminer S21 XP Hydro 473T mining unit
• Cooling manifold/connections (confirm specifications at time of purchase)
• Power supply (confirm inclusion at time of purchase)
• Power cables
• Quick-start documentation