Bitmain AntMiner S21 XP

Miner + Setup & Support

£3,300.00

Bitmain AntMiner S21 XP

Verified ASIC Hardware Supplier

Bitmain AntMiner S21 XP

BTC & BCH ASIC Miner

£3,300.00

Setup Available

In stock - Ready to Ship

Key Specifications

Hash Rate: 270TH/s

Power: 3645W

Algorithim: SHA-256

Efficiency: 13.5J/T

The Bitmain Antminer S21 XP 270T is a powerful and efficient air-cooled Bitcoin ASIC miner designed for robust SHA-256 mining performance in home and small-scale setups. Delivering approximately 270 terahashes per second of hashing power, this model strikes a strong balance between throughput and power use, making it a practical choice for miners in the UK and EU who want effective BTC mining without the complexity of advanced cooling systems.

Setup & Support: Recommended for most buyers

Remote setup service

Power & saftey guidance

Network & account setup

Miner configuration

This miner is available as hardware only or with our Setup & Support package which is recommended for most buyers.

The Setup & Support option includes remote configuration, power and safety guidance, network and mining account setup, and full miner configuration to ensure your equipment is deployed correctly and operating efficiently. Ongoing remote support is also available to assist with optimisation and troubleshooting.

Select the option that best suits your level of experience and operational requirements.

We dispatch in-stock items promptly and typical delivery is within 5-10 working days. Larger or high-value ASIC miners may be shipped via insured courier or palletised freight to ensure secure delivery. Please note that delivery times are estimates and may vary depending on stock availability and supplier schedules.

For full details on processing times, pre-orders, international delivery and delivery requirements, please refer to our Shipping Policy.

If you are purchasing as a consumer, you may cancel your order within 14 days of delivery, provided the item is unused and in its original condition. Due to the technical nature of ASIC mining equipment, hardware that has been installed, powered on or configured may not be eligible for return unless faulty.

Faulty goods are handled in accordance with UK consumer law. Business purchases and wholesale orders are non-refundable unless confirmed defective.

For full details, including return conditions and procedures, please refer to our Returns & Refunds Policy.

All ASIC miners are supplied with the original manufacturer’s warranty, provided the unit remains unmodified and is operated in accordance with the manufacturer’s guidelines. Warranty terms, duration and claim procedures are determined by the manufacturer.

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Model

Hash Rate

Power

Efficiency

Algorithm

AntMiner S21 XP

270TH/s

3645W

13.5J/T

SHA-256

The Antminer S21 XP is part of Bitmain’s high-efficiency S21 series, representing the company’s next generation of SHA-256 mining hardware after the S19 and S20 families. With a rated hashrate of approximately 270 TH/s, the S21 XP is engineered to provide solid mining output while maintaining manageable power consumption and thermal characteristics.

Typical power draw for the 270T variant falls in the ~4,400–4,800 W range under sustained load, depending on ambient temperature, airflow, and power supply efficiency. Bitmain released the S21 series beginning in late 2024, with widespread customer availability for the S21 XP models through 2025. These miners leverage refined chip designs, improved board layouts, and updated firmware to sustain high throughput over extended continuous operation.

Bitmain is one of the most recognised manufacturers of cryptocurrency mining hardware globally and the creator of the Antminer brand. Since its founding in 2013, Bitmain has driven much of the ASIC mining industry forward by designing application-specific integrated circuit (ASIC) miners for a variety of proof-of-work algorithms, most notably SHA-256 for Bitcoin.

Bitmain’s products are widely supported in the mining ecosystem, with compatibility across major mining pools, firmware upgrade paths, and integration with popular third-party monitoring and management tools. The Antminer S21 XP continues this tradition by combining high-performance ASIC design with established hardware support infrastructure, making it accessible for retail miners.

The S21 XP 270T typically achieves an effective energy efficiency in the ~8.0–9.0 J/TH range when operating under nominal conditions. This efficiency reflects the joules of electrical energy consumed per terahash of SHA-256 hashing work and represents an improvement over many earlier air-cooled Bitcoin ASICs.

Efficiency depends on factors such as intake air temperature, power supply performance, and miner tuning. In the UK and EU where electricity costs are often a key component of mining economics, this energy profile helps keep power usage manageable without sacrificing hashing output.

The Bitmain Antminer S21 XP 270T mines using the SHA-256 proof-of-work algorithm, the cryptographic hashing function that underpins Bitcoin (BTC) as well as several other SHA-256-based coin networks. SHA-256 ASIC miners contribute to network security by performing high volumes of cryptographic hash computations to validate new blocks and compete for block rewards.

While technically compatible with other SHA-256 coins, the primary deployment for this miner is Bitcoin mining due to Bitcoin’s dominant network hashrate, deeper liquidity, and broader mining ecosystem.

ASIC miners such as the Antminer S21 XP 270T are built for continuous 24/7 operation and can remain productive for 3–5 years when maintained in suitable conditions. Key factors influencing lifespan include airflow management, ambient temperature control, stable power delivery, and regular dust/dirt maintenance.

Released in late 2024–2025, the S21 XP 270T sits in the current generation of high-efficiency SHA-256 miners and should remain a relevant choice for retail home miners over multiple years of operation. While future generations may push efficiency further, this model remains competitive within its performance class and is well suited for miners focused on straightforward, air-cooled SHA-256 hashing.

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Frequently asked questions

We accept major debit and credit cards, bank transfer and selected digital payment methods where indicated at checkout. All payments must be received and cleared before goods are dispatched unless otherwise agreed in writing.

For certain orders, we offer a deposit option:

10% deposit for miners valued over £2,000
20% deposit for miners valued under £2,000

The remaining balance must be paid before dispatch. Deposit arrangements are subject to approval and confirmed stock allocation.

All miners are supplied with the original manufacturer’s warranty, provided the unit remains unmodified and is operated in accordance with manufacturer guidelines. Warranty terms and claim processes are determined by the manufacturer.

Yes. We offer an optional Setup & Support package that includes remote installation guidance, power and safety advice, network and mining account setup, and full miner configuration. Ongoing remote support is also available.

Yes. ASIC miners require appropriate electrical capacity and ventilation. We provide guidance on power supply, load considerations and safe operation, but customers remain responsible for ensuring their installation complies with local regulations.

Delivery times vary depending on stock status and location. Estimated timeframes are provided on product pages and at checkout. Pre-orders are subject to manufacturer schedules.

Yes. We support both new purchases and existing operations. Our team can assist with troubleshooting, optimisation, firmware configuration and scaling advice.

No. Mining profitability depends on factors outside our control, including Bitcoin price, network difficulty, power costs and regulatory conditions. We provide hardware and technical support, but returns cannot be guaranteed.

Yes. We supply individual operators and commercial-scale buyers. Please contact us directly to discuss wholesale availability and trade pricing.