The Bitmain Antminer T21 is a powerful application-specific integrated circuit (ASIC) miner designed for the SHA-256 algorithm. With a substantial hashrate of 190 TH/s, it is engineered for individuals and operations seeking efficiency in Bitcoin mining. This analysis delves into its profitability, specifications, and key considerations for potential users.
Key Features and Specifications
The Antminer T21 is built with performance and durability in mind. Below are its core technical specifications:
- Release Date: February 2024
- Dimensions: 400 x 212 x 290 mm
- Weight: 16.4 kg
- Algorithm: SHA-256
- Hashrate: 190 TH/s (±5%)
- Power Consumption: 3610 W (±5%)
- Power Efficiency: 19 J/TH
- Noise Level: Approximately 76 dB
- Operating Temperature: 0 °C to 45 °C
These specs position the T21 as a competitive unit in the current market, balancing raw power with energy efficiency.
Profitability Breakdown
Mining profitability is dynamic and depends heavily on factors like Bitcoin's market price, network difficulty, and electricity cost. The following projections are estimates based on a specific snapshot in time and an assumed electricity rate of $0.10 per kWh.
Daily Projections
- Gross Income: $11.22
- Electricity Cost: -$8.66
- Net Profit: $2.56
Monthly Projections (30 Days)
- Gross Income: $336.75
- Electricity Cost: -$259.92
- Net Profit: $76.83
Annual Projections (365 Days)
- Gross Income: $4,097.09
- Electricity Cost: -$3,162.36
- Net Profit: $934.73
It is crucial to remember that these figures are illustrative. A significant increase in network mining difficulty or a drop in Bitcoin's price can drastically reduce these earnings. Conversely, a price surge can improve profitability. 👉 View real-time profitability calculators to model different scenarios based on live data.
Mineable Coins and Algorithms
The Antminer T21 is dedicated to the SHA-256 algorithm. This primarily includes:
- Bitcoin (BTC): The primary coin for this miner.
- Bitcoin Cash (BCH): A popular alternative that can also be mined profitably.
- Other SHA-256 Coins: The miner can process any cryptocurrency that uses the SHA-256 hashing function.
Cost Analysis and Payback Period
The initial investment in the hardware is the major upfront cost. Market prices for the Antminer T21 can vary significantly based on the supplier, region, and market demand.
The payback period is the time required for the mining profits to equal the initial cost of the miner. Based on the projected net profit of ~$2.56 per day and an example miner cost of approximately $2,120, the estimated payback period is roughly 664 days, or about 22 months.
This period can be shorter or longer based on the actual purchase price, fluctuations in cryptocurrency value, and changes in mining difficulty.
Operational Considerations
Running an ASIC miner like the T21 requires more than just plugging it in. Key operational factors include:
- Power Supply: A reliable, high-efficiency ATX power supply unit (PSU) is required, often sold separately.
- Heat Management: The unit generates significant heat. Adequate ventilation or a dedicated cooling system is necessary to prevent overheating and maintain performance.
- Noise: At 76 dB, the T21 is very loud. It is unsuitable for a living space and is best housed in a garage, basement, or dedicated mining facility.
- Internet Connection: A stable internet connection is required for the miner to communicate with your chosen mining pool.
Frequently Asked Questions
How does the Antminer T21 compare to other models like the S21?
The T21 offers a strong balance of hashrate and efficiency. It may have a slightly lower absolute efficiency (J/TH) than the flagship S21 model but often comes at a lower initial purchase price, making it an attractive option for miners focused on the cost-to-performance ratio.
What is the most important factor for mining profitability?
Electricity cost is the most critical variable after the initial hardware investment. A lower electricity rate directly increases your net profit margin. Miners with access to industrial or subsidized power rates have a significant advantage.
Can I mine any cryptocurrency with the Antminer T21?
No. The T21 is an ASIC miner, meaning it is hardwired to only work with the SHA-256 algorithm. It cannot be used to mine coins that use other algorithms, such as Ethash (Ethereum Classic) or Scrypt (Litecoin).
What is a mining pool and do I need to join one?
A mining pool is a group of miners who combine their computational resources to increase their chances of successfully mining a block. The rewards are then shared among participants based on their contributed hashrate. For a solo miner with a single T21, joining a pool is essential to receive consistent, regular payouts.
What happens if the Bitcoin network difficulty increases?
As more miners join the network, the difficulty of finding a new block increases. This means your individual miner will solve fewer shares, reducing your overall income from the pool if the coin's price remains static. Profitability is a constant race against rising difficulty.
Where can I get repair services for my Antminer?
Several third-party specialist companies offer repair services for ASIC miners. It is important to choose a reputable provider with experience in handling Bitmain products. Common services include hashboard repair, control board replacement, and general maintenance. Always check reviews and service warranties before shipping your hardware. For a deeper dive into maximizing your setup, 👉 explore more strategies.