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The Bitmain Antminer T21 marks a significant advancement in the realm of cryptocurrency mining technology. Officially unveiled at the Blockchain Life 2023 conference, this model is specifically engineered for mining cryptocurrencies that utilize the SHA-256 algorithm, such as Bitcoin (BTC). This release underscores Bitmain’s ongoing commitment to innovation, particularly in enhancing the efficiency and performance of its mining hardware.

The Antminer T21 was introduced during a period characterized by heightened competition among ASIC manufacturers aiming to offer more power-efficient and cost-effective solutions. Its launch follows the success of its predecessors, the Antminer S19 and S21 series, and is designed to provide a more accessible option for both industrial-scale operations and enthusiastic home miners, especially those dealing with three-phase power setups.

The T21 is tailored for individuals and enterprises aiming to maximize their mining output while managing operational costs. With its robust processing power of 190 terahashes per second (TH/s) and an energy efficiency of 19 joules per terahash (J/TH), the T21 is positioned as a competitive choice for serious miners seeking reliability and efficiency in their mining operations.

For potential buyers and existing miners, understanding the full specifications of the Antminer T21 is crucial. The specifications not only provide insights into the operational capabilities and power efficiency of the miner but also help in assessing compatibility with existing mining setups, including electrical configurations and physical space requirements. Moreover, detailed knowledge of the miner’s specifications aids in making informed purchasing decisions, optimizing mining operations, and ensuring that the setup aligns with the environmental and economic conditions of the mining site.

By comprehensively detailing the Antminer T21’s capabilities, potential upgrades, and operational requirements, miners can better strategize their investments and operational setups to maximize returns in the volatile cryptocurrency mining market.

Detailed Specifications

Hashrate and Power Efficiency

Exact Hashrate Capabilities:

Power Consumption and Efficiency:

Physical Dimensions

Measurements of the Miner:

Weight Specifications:

These dimensions and weight specifications are important for miners when planning the physical setup, including shelving and spacing for air circulation around the miners to prevent overheating.

Electrical Requirements

Power Supply Specifications:

Explanation of Three-Phase Power vs. Single-Phase Power Setups:

Network and Connection

Type of Networking Connection Used:

Setup Requirements and Compatibility:

Understanding these detailed specifications will help potential buyers and miners ensure they have the appropriate infrastructure in place to operate the Antminer T21 efficiently. Proper setup and maintenance are crucial to maximizing the miner’s performance and longevity, thereby enhancing the overall profitability of the mining operation.

Operational Environment

Optimal Operating Conditions

Suitable Temperature and Humidity Ranges:

Impact of Environmental Conditions on Miner Performance:

Noise and Cooling Specifications

Cooling System:

Noise Level Measurements:

User Expectations:

Understanding these operational environment factors is essential for maintaining the Antminer T21’s efficiency and longevity. Proper management of the operational environment will not only optimize mining results but also help in reducing wear and tear on the device, thereby extending its usable life.

Advanced Features and Technologies

The Antminer T21 incorporates several advanced features and proprietary technologies designed to enhance both its performance and security. These improvements are critical in maintaining competitive mining outputs and ensuring the stability and security of the mining operations.

Firmware Features

Secure Boot:

Root Authority:

Proprietary Technology

Advanced Cooling Technology:

Energy-Efficiency Optimization:

Performance Stability Systems:

These advanced features and technologies not only bolster the Antminer T21’s performance capabilities but also fortify its defenses against a range of security threats, ensuring that miners can operate with peace of mind. By continuously innovating and improving upon its hardware, Bitmain ensures that its products remain at the forefront of the cryptocurrency mining industry, providing users with reliable and effective mining solutions.

Potential Setups and Modifications

Home Mining Adaptations

Adapting Three-Phase Power for Home Use: The Antminer T21 typically requires a three-phase power setup which is not available in standard residential environments. To adapt this miner for home use, a conversion to a single-phase power supply is necessary. This is achieved by replacing the existing power supply unit (PSU) with one that supports single-phase power, specifically the APW12 PSU, which is compatible with older mining models like the Antminer S19.

Additional Equipment for Safe and Efficient Operation:

Cost and Efficiency Comparison: T21 vs. S21

Cost Analysis:

The Antminer S21 is slightly more expensive than the T21, but it comes ready for use in more typical mining setups without needing significant modifications.

Efficiency and Performance:

Situational Advice on Model Selection

When to Choose the T21:

When to Prefer the S21:

In conclusion, choosing between the Antminer T21 and S21 should consider personal circumstances such as budget constraints, residential power setup, and long-term efficiency goals. The T21 offers a great learning curve with modifications, while the S21 might be preferable for turnkey operations with minimal setup requirements.


The Antminer T21 by Bitmain is a formidable player in the realm of cryptocurrency mining hardware, engineered to target SHA-256 algorithm cryptocurrencies such as Bitcoin, Bitcoin Cash, and Bitcoin SV. Noteworthy for its robust output and efficiency, the T21 boasts a hashrate of 190 TH/s and a power efficiency of 19.0 joules per terahash, positioning it as a highly competitive option for both industrial and serious home miners.

This model is distinctively designed for three-phase power environments but can be adapted for single-phase power through specific modifications, expanding its accessibility to a broader range of users, including those operating from home setups. The conversion involves replacing the standard PSU with a model like the APW12 and making adjustments with S19 bus bars to accommodate a single-phase electrical setup.

Within Bitmain’s extensive lineup, the T21 serves as a mid-to-high range option, sitting between the less powerful S19 and the more advanced S21 in terms of both cost and performance. It offers a balance of efficiency and power at a price point that is noticeably lower than the S21, especially when factoring in the cost of necessary modifications for optimal home use.

In conclusion, the Antminer T21 is a viable investment for those looking for a capable and somewhat versatile mining solution. It is particularly suited to individuals and organizations that can manage the initial modifications for single-phase use and are equipped to handle the operational demands of a high-power device. As with any investment in cryptocurrency technology, potential users should consider current and future market conditions, their operational setup, and energy costs to assess whether the T21 aligns with their mining objectives and financial strategies.

Investors are encouraged to keep abreast of market trends and technological advancements to make informed decisions that maximize returns and ensure the sustainability of their mining operations.


What is the Bitmain Antminer T21?

The Bitmain Antminer T21 is a high-performance cryptocurrency miner designed to mine SHA-256 algorithm cryptocurrencies like Bitcoin. It features a hashrate of 190 TH/s and an energy efficiency of 19 joules per terahash, making it a competitive option for both industrial-scale operations and home miners.

What makes the Antminer T21 stand out?

The Antminer T21 is notable for its robust processing power, energy efficiency, and suitability for three-phase power environments. It’s engineered for both serious home miners and industrial operations, offering a balance of power and efficiency that positions it competitively in the market.

Can the Antminer T21 be adapted for home use?

Yes, the Antminer T21, which is typically designed for three-phase power environments, can be adapted for single-phase power found in home settings. This conversion involves replacing the standard power supply unit (PSU) with one that supports single-phase power, such as the APW12 PSU, alongside adjustments with S19 bus bars.

How does the Antminer T21 compare to its predecessors and other models like the S21?

The Antminer T21 sits between the less powerful S19 and the more advanced S21 models in terms of cost and performance. It offers a more accessible option for those looking for a balance between efficiency and power at a price point lower than the S21, especially when considering the adaptation for home use.

What are the electrical requirements for the Antminer T21?

The Antminer T21 requires a power supply with an AC input voltage of 380~415V for three-phase power settings, with a standard input current of 12 Amps. It consumes approximately 3610 watts of power.

What are the optimal operating conditions for the Antminer T21?

The optimal operating conditions for the T21 include a temperature range of 0°C to 45°C and a humidity range of 10% to 90% non-condensing. Proper management of these conditions ensures efficient mining operations without overheating risks or hardware damage due to condensation.

What advanced features and technologies does the T21 incorporate?

The Antminer T21 incorporates advanced features such as Secure Boot for firmware security, Root Authority for restricted firmware and system modifications, proprietary cooling technology for temperature management, and power-saving technologies to improve energy efficiency.

How should investors approach mining hardware investments like the Antminer T21?

Investors should consider market trends, technological advancements, operational setups, and energy costs to assess whether models like the Antminer T21 align with their mining objectives and financial strategies. Keeping abreast of these factors can help maximize returns and ensure the sustainability of mining operations.