Bitmain Antminer S21+ Hydro 338 TH/s – Bitcoin ASIC miner

Key information about Bitmain Antminer S21+ Hydro 338 TH/s

Bitmain Antminer S21+ Hydro 338 TH/s is a high‑performance water‑cooled ASIC miner designed for efficient Bitcoin mining on the SHA‑256 algorithm. This model delivers a hashrate of 338 TH/s with power consumption of about 5070–5450 W depending on firmware, water temperature and operating mode, resulting in an energy efficiency in the range of roughly 15–16 J/TH in real‑world conditions. Such characteristics place the S21+ Hydro 338 TH/s among the most powerful and efficient hydro‑cooled BTC miners in its class, making it attractive for industrial farms that want maximum hashrate per kilowatt and per rack.

The miner uses a hydro cooling system that circulates coolant (typically water or a water‑glycol mix) through integrated cold plates to maintain chip temperatures under continuous heavy load. This design removes the need for high‑speed fans on the miner itself, shifting most of the noise to pumps and external cooling equipment and reducing dust‑related issues on the hash boards. Bitmain Antminer S21+ Hydro 338 TH/s is intended for 24/7 operation in professionally engineered mining rooms, hydro containers and industrial boiler setups where it becomes part of a closed cooling loop with pumps, manifolds, filters and heat exchangers.

Specifications

• Model: Bitmain Antminer S21+ Hydro 338 TH/s
• Hashrate: 338 TH/s (SHA‑256)
• Algorithm: SHA‑256 (Bitcoin and other SHA‑256‑based coins)
• Power Consumption: approximately 5070–5450 W at the wall, depending on operating conditions and firmware version
• Energy Efficiency: approximately 15–16 J/TH in typical hydro setups
• Cooling Type: hydro cooling (closed‑loop liquid cooling, external pump station and heat exchangers required)
• Input Voltage: 3‑phase industrial AC input, typically around 380–415 V, 50–60 Hz
• Noise Level: significantly lower at miner level compared to air‑cooled units; most noise comes from pumps and external cooling equipment
• Release Date: around Q1 2025 for the first S21+ Hydro 338 TH/s batches
• Dimensions: similar to other S21 Hydro series miners; compact hydro chassis suitable for dense mounting
• Weight: comparable to other S21 Hydro units, typically over 15 kg including integrated PSU and water manifolds
• Network Connection: Ethernet (RJ‑45)
• Typical Use Case: professional BTC mining farms, hydro containers, boiler‑room projects and industrial heat‑recovery systems

Profitability and ROI of Bitmain Antminer S21+ Hydro 338 TH/s

The profitability of the Bitmain Antminer S21+ Hydro 338 TH/s depends on its 338 TH/s hashrate and 15–16 J/TH efficiency, together with external factors including Bitcoin price, network difficulty, pool fees and your electricity tariff. To estimate potential income, you can use ASIC profitability calculators, entering 338 TH/s and a power draw around 5.1–5.5 kW for your operating conditions, including energy cost and pool commission. This will provide expected daily and monthly revenue and make it easy to compare the S21+ Hydro 338 TH/s with other hydro and immersion miners in terms of net profit, cost per terahash and payback time.

The core ROI calculation remains simple: payback period equals miner purchase price divided by the difference between monthly mining income and monthly electricity costs. With its strong efficiency and high hashrate density, the S21+ Hydro 338 TH/s can offer competitive economics in locations with industrial power tariffs or access to cheap surplus energy, especially when integrated into heat‑recovery schemes. However, profitability is sensitive to Bitcoin price swings and difficulty growth, so miners should regularly recalculate results and model multiple scenarios for a 12–36 month horizon using different BTC prices, difficulty trajectories and electricity rates.

Advantages of Bitmain Antminer S21+ Hydro 338 TH/s

High hashrate and strong efficiency – with 338 TH/s and roughly 15–16 J/TH, Bitmain Antminer S21+ Hydro 338 TH/s offers a powerful combination of performance and energy savings compared to many older air‑cooled generations. Hydro cooling – the liquid‑cooled design keeps chip temperatures stable, reduces thermal stress, eliminates fan failures and significantly cuts dust‑related issues on the miner. Increased density – hydro‑cooled units can often be deployed more densely than air‑cooled hardware because airflow, hot and cold aisles and fan backpressure are no longer limiting factors.

Another key advantage is the potential for efficient heat reuse. Nearly all of the electrical energy consumed by the S21+ Hydro 338 TH/s is converted into heat in the coolant, which can be captured via heat exchangers and used for space heating, industrial processes or integration into district heating systems. For farms in colder climates or facilities with constant heat demand, this can improve overall project economics by offsetting part of electricity costs with useful thermal energy. In addition, S21+ Hydro units integrate well with modern monitoring systems and custom firmware, allowing operators to fine‑tune performance and power draw across the fleet.

Potential drawbacks and what to consider

Hydro infrastructure required – Bitmain Antminer S21+ Hydro 338 TH/s is not a standalone plug‑and‑play device for beginners. It requires a properly designed liquid loop with pumps, manifolds, piping, filters, expansion tanks and heat exchangers, as well as careful control of coolant quality and regular maintenance. The upfront capital expenditure for this infrastructure is higher than for basic air‑cooled racks, and design mistakes can lead to reduced performance, higher operating costs or hardware damage.

Higher entry threshold – as a newer high‑efficiency hydro miner, the S21+ Hydro 338 TH/s typically has a higher purchase price than many air‑cooled or older models. Its long‑term competitiveness depends on electricity rate, quality of hydro implementation and BTC market conditions; if electricity is expensive and there is no opportunity for heat reuse, payback periods may be longer. Before investing, operators should compare its expected net profit with other S21, S21 XP and immersion models, taking into account both capex and opex across the expected lifetime of the equipment.

Who is Bitmain Antminer S21+ Hydro 338 TH/s suitable for?

Bitmain Antminer S21+ Hydro 338 TH/s is best suited for professional mining companies, hosting providers and industrial projects that already operate or plan to build hydro‑cooling infrastructure. It is an excellent match for high‑density mining containers, boiler‑room installations, industrial facilities and data‑center‑style farms where noise must be managed and where high heat output can be put to practical use. In these scenarios, the S21+ Hydro 338 TH/s can provide substantial hashrate while functioning as a stable and predictable heat source.

The model is also interesting for experienced miners upgrading from earlier S19 or S21 air‑cooled fleets to hydro solutions to improve efficiency, reduce dust and extend hardware lifetime. For hosting providers focusing on hydro‑cooled offerings, including S21+ Hydro 338 TH/s units in their portfolio can help attract clients seeking efficient, modern hardware with strong performance per watt. In all cases, successful deployment requires careful electrical and hydraulic design, realistic profitability analysis and disciplined operation of the hydro system.

How to buy Bitmain Antminer S21+ Hydro 338 TH/s from us

Buying Bitmain Antminer S21+ Hydro 338 TH/s in our shop is straightforward. First, check the current price and availability on this product page and review the key specifications, including hashrate, power consumption, cooling requirements and electrical parameters. If you need help choosing the optimal number of units, designing the hydro loop or evaluating profitability for your electricity rate and planned deployment, contact our support team and we will prepare an individual calculation for your project.

After you confirm the configuration, add the Antminer S21+ Hydro 338 TH/s to your cart and proceed to checkout. We support secure payment options, including bank transfer and cryptocurrency, and for bulk orders we can reserve miners after receiving a deposit according to current terms. Once payment is confirmed, we carefully pack the devices and arrange tracked delivery so you can monitor the shipment status. Our team can also provide basic guidance on integrating the miners into your hydro system, connecting them to mining pools and monitoring performance, helping you start mining as quickly and smoothly as possible.

Bitmain Antminer S21+ Hydro 338 TH/s Video Review

To increase user engagement on the product page, you can embed a video review of the Bitmain Antminer S21+ Hydro 338 TH/s showing real hashrate, power draw, coolant temperatures and stability under load in a working hydro farm. A practical video overview helps potential buyers see how the miner is connected to the cooling loop, how loud the system is in real conditions and what to expect during installation, tuning and daily operation.