Product Overview

The Bitmain Antminer S21e Hydro 338T is a hydro-cooled Bitcoin (BTC) SHA-256 ASIC miner delivering 338 TH/s at approximately 3,718W. As the top-tier variant in the Bitmain S21e Hydro series (above the 310T and 332T), the S21e Hydro 338T delivers the maximum hashrate available from the S21e hydro-cooled platform — making it the preferred choice for operators who want to extract every additional terahash from the S21e architecture.

The S21e Hydro series uses liquid cooling to achieve hashrates impossible with air-cooled fan arrays. The S21e Hydro 338T’s 338 TH/s output at approximately 11 J/TH represents the highest hashrate variant in the S21e lineup, with the same near-silent operation and hydro-cooling infrastructure requirements shared across the series.

For South African operators, the S21e Hydro 338T represents the peak of the S21e hydro-cooled platform. Its infrastructure requirements — hydro-cooling loop and industrial electrical supply — make it exclusively suited to large-scale commercial facilities. When per-unit hashrate within the S21e platform is the deciding factor, the 338T is the optimal choice.

Key Features

• 338 TH/s SHA-256 Hashrate (±3%): Maximum hashrate in the S21e hydro series. Extracts the highest per-unit output from the S21e platform architecture.
• Hydro-Cooled Architecture: Closed-loop liquid cooling replaces fans, enabling sustained high hashrate. Requires external cooling infrastructure.
• ~11 J/TH Power Efficiency: Consistent efficiency across the S21e hydro series at the 338 TH/s tier.
• 3,718W Power Consumption: Industrial power draw requiring multi-phase electrical infrastructure.
• Near-Silent Operation: No high-speed fans — operates near-silently compared to air-cooled alternatives.
• S21e Platform Top Variant: Highest hashrate S21e hydro-cooled configuration available from Bitmain.
• Standard Ethernet Management: Compatible with major Bitcoin mining pools and ASIC management platforms.

Technical Specifications

• Algorithm: SHA-256
• Supported Coins: Bitcoin (BTC), Bitcoin Cash (BCH), and other SHA-256 cryptocurrencies
• Hashrate: 338 TH/s (±3%)
• Power Consumption: ~3,718W (±5%)
• Power Efficiency: ~11 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
• Power Supply: Confirm inclusion at time of purchase

Power & Installation Notes

The Antminer S21e Hydro 338T draws approximately 3,718W continuously. Multi-phase electrical supply and high-amperage dedicated circuits are required — all certified by a registered electrician in compliance with SANS 10142. South Africa’s 230V / 50Hz supply is compatible, but the power draw demands industrial-grade infrastructure.

The hydro-cooling loop — circulation pumps, coolant piping, heat exchanger manifold, and external dry cooler or cooling tower — is the essential additional installation component. Specialist hydro-cooling integrators should design and install this infrastructure before the miner is commissioned.

Load shedding at 3,718W cannot be managed with any standard inverter. Commercial generator capacity is required for uninterrupted operations through South African power outages.

Electricity Cost Context — South Africa

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

(3718 ÷ 1,000) × 24 × 30 × 2.80 = R7495.49 per month

This is an operating cost estimate only. The marginal increase over the 332T (6 TH/s more hashrate at ~66W more power) maintains the same efficiency profile — the 338T’s higher hashrate comes at proportionally higher electricity cost. Commercial tariffs will differ from this residential reference figure.

Ideal Use Cases

• Maximum S21e platform output: For operators committed to the S21e hydro-cooled platform, the 338T delivers the highest per-unit hashrate available in the series.
• Large-scale commercial Bitcoin mining: Designed for professional operations with dedicated hydro-cooling and industrial electrical infrastructure.
• High-density mining facilities: Maximising TH/s per square metre of facility floor space through hydro-cooled deployment.
• Noise-sensitive deployments: Near-silent operation for facilities where ASIC fan noise is an operational or compliance concern.

Frequently Asked Questions

Does the S21e Hydro 338T require special plumbing?
Yes — a complete closed-loop liquid cooling system with external heat rejection is required. Specialist installation is necessary.

How does the 338T compare to the 332T and 310T?
The 338T is the top S21e hydro variant: 338 TH/s vs 332 TH/s (332T) and 310 TH/s (310T). All share similar efficiency. Choose the 338T for maximum per-unit S21e hashrate.

Is this suitable for home mining?
No. The hydro-cooling and industrial power requirements make this exclusively suited to large-scale commercial operations.

Can it handle South African load shedding?
Not without commercial generator capacity. Plan for downtime or invest in industrial generator backup.

Is the PSU included?
Confirm at time of purchase.

What’s Included

• 1× Bitmain Antminer S21e Hydro 338T mining unit
• Cooling manifold/connections (confirm specifications at time of purchase)
• Power supply (confirm inclusion at time of purchase)
• Power cables
• Quick-start documentation