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Bitmain Antminer S21+ 235T 3564W – The New Standard in Bitcoin Mining
WE WOULD LIKE TO INTRODUCE Bitmain Antminer S21+ 235T 3564W – advanced model from the S21 series from the company Bitmain, designed for professional miners looking for the ideal balance between high performance and energy efficiency. This ASIC miner, released in early 2025, offers an impressive hash rate of 235 TH/s while consuming only 3564 W, making it one of the most powerful SHA-256 Bitcoin mining devices. With an energy efficiency of 16,5 J/TH, the Antminer S21+ allows you to optimize your electricity costs while maintaining your performance leadership position.
Key Features of Antminer S21+ 235T
Maximum performance: Hash rate 235 TH/s ensures high calculation speed, ideal for mining Bitcoin, Bitcoin Cash and other coins using the SHA-256 algorithm.
Optimized energy efficiency: The value of 16,5 J/TH reduces electricity costs, which is especially crucial at a time of increasing network difficulty after the halving in 2024.
Improved cooling system: It is equipped with four high-speed fans (140mm) that effectively dissipate heat and maintain stable operation at a noise level of around 76dB. It is recommended to install in a well-ventilated room or with the use of sound insulation.
Compactness and reliability: The dimensions of the device are 400 x 195 x 290 mm (without packaging) and weigh 15,4 kg, which makes it easy to place it on mining farms of various sizes.
Universality of operating conditions: It operates at temperatures from 0°C to 45°C and humidity from 10–90%, allowing it to adapt to different climatic conditions.
Technical Specifications
Algorithm: SHA-256
Hash rate: 235 TH / s
Power consumption: 3564 W
Energy efficiency: 16,5 J/TH
Tension: 220-277 V
Interface: Ethernet (RJ45)
Dimensions: 400 x 195 x 290 mm (without packaging)
Weight: 15,4 kg (net), 22,9 kg (gross)
Noise level: 76 dB
Fans: 4 (140mm, 4-pin)
Operating temperature: 0 ° C - 45 ° C
Guarantee: 1 year (when purchased through official distributors)
Why choose Antminer S21+ 235T?
The Antminer S21+ 235T stands out thanks to the use of advanced 5nm chips, which provide 17% higher energy efficiency compared to the standard S21 model. This device is ideal for miners who want to achieve high performance without significantly increasing electricity costs. The model supports stable operation even under high loads, and the supplied power supply (PSU) together with the cable (P13-C20) make installation easy. For long-term mining investments, the S21+ will become a reliable partner and give you a competitive advantage in 2025.
Recommendations for operation
Install the miner in a cool room with a temperature of 10–20°C for maximum performance.
Use a quality power cord (16A, C19) for stable operation.
Clean dust from fans regularly to prevent overheating and extend the life of the device.
To reduce noise, consider using immersion cooling or placing in an insulated room.
záver
Bitmain The Antminer S21+ 235T 3564W combines performance, efficiency, and reliability, making it a great choice for modern miners. Whether you are a beginner or a seasoned pro, this miner will help you maximize your Bitcoin mining profits. Order your Antminer S21+ today and become part of the future of cryptocurrency mining!
BITMAIN is the world's leading manufacturer of digital currency mining servers through its ANTMINER brand, which has long maintained global market share and technology leadership, serving customers in more than 100 countries and regions. The company has subsidiaries in the United States, Singapore, Malaysia, Kazakhstan and other locations.
Tutorials
We will set up all miners for free so that they benefit your wallet and earn money only for you. Just send us the information on which wallet they want to mine. If you don't have a wallet yet, we'll be happy to help you set it up.
We accept payments by credit card in cash, PayPal payments, bank transfer, USDT or Bitcoin cryptocurrency. For companies and customers outside the Czech Republic, we issue invoices in EURO currency. We use a medium conversion rate, so the customer does not lose by changing the exchange rate.
Taxes and VAT (VAT)
All prices on our website include VAT, which is generally 21%.
We issue invoices with transferred VAT, i.e. without VAT, to companies from European Union countries.
We issue invoices without tax - VAT to persons and companies outside Europe. If you pay with VAT, the VAT will be refunded to you.
Discounts
For cash payments, it is possible for end consumers to individually negotiate a discount, which is in the order of a percentage, depending on the product and the circumstances. In this way, we save on fees and at the same time support personal contact with the customer. We provide a 3% discount for payments in USDT. The customer will receive a normal invoice, on which, in addition to the prices in CZK or EUR, the price in USDT will be indicated, along with the address to which the USDT should be sent.
We provide a 3% discount for payments in USDT. The customer will receive a normal invoice, on which, in addition to the prices in CZK or EUR, the price in USDT with the address will be indicated.
For some products such as ASIC miners, instead of 100% advance payment, we collect reservation deposits. Thanks to the backup, you are sure that ASIC we will arrange for you and the price will not change and you do not have to pay the full amount before delivery. For already made ASIC miners we collect a 20% deposit and pro ASIC miners in production, or pre-orders we require a 50% deposit.
Warranty
Warranty
2 years warranty
We provide a full statutory warranty on all products. As one of the few companies in Europe, we have a service center for ASIC miners Bitmain, Jasminer and Iceriver. For ASIC miners we provide a guarantee for years for all natural persons. You can claim the warranty with us in Prague, Czech Republic, and you don't have to send it ASIC miners back to the manufacturers in China, saving around 9 CZK on transport. Computers, servers and ASIC we repair miners free of charge under warranty within 30 days. We can resolve most complaints within 6 hours.
Service
We provide warranty and post-warranty service for computers, servers, projectors and ASIC miners. We provide service in the Czech Republic in Prague. The expected price of the service is always agreed in advance and the fault diagnosis is free.
Configuration and training
We will be happy to configure all products in the price and free of charge according to the individual needs of the customer. This applies to all computers, servers and ASIC miners. With a new one ASIC miner, we will help you with the configuration and we can do it for you so that it will mine only for you. We will help you with the setup ASIC miner and also with a cryptocurrency wallet. We can pre-configure for you free of charge ASIC miner for mining in your wallet at your place or on the exchange. We will also be happy to introduce you to the basic security principles associated with the use of cryptocurrency wallets and cryptocurrency mining.
Transport
Transport
We send all shipments by a transport service with a tracking number. We send shipments up to 30 kg as parcels. For example: computers, servers, ASIC miners, computer components. Shipments over 30 kg are sent by pallet transport. For example: soundproof box for ASIC miners, server rack. Delivery Time:
Czech Republic: by the next day.
Slovakia, Germany, Poland, Austria: within 3 days.
All Europe: within 4 days.
USA, Canada: within 5 days - by air.
Other destinations: within 7 days by air.
Packing
We pack all shipments in such a way that they survive a fall from a height of 80 cm. Pallet transport allows loose packaging.
Computers, servers and ASIC we pack miners in triple packaging: original packaging from the manufacturer + corresponding reinforcing packaging from us + extra protective outer packaging.
Profitability
Profitability ASIC miners is their profitability after deducting the cost of the electricity they consume from the outlet. To calculate profitability, a price per 1 kWh of electricity of USD 0,1 is generally used, which corresponds to CZK 2,2 without VAT. Here you will find profitability chart mining miners as of today:
profitability and profitability of tezba ASICU per day
Pre-orders
Pre-orders ASIC we deliver miners on the promised date. We provide accurate information on the announced date of production from the factory. A few days for shipping and customs clearance must be added to that date. For pre-orders, we require a reservation deposit of only 50%. With this, you reserve a price that will not change for you. Very often it happens that the price of a stock piece ASIC miner is much higher than the pre-order piece. This is especially true for the latest ASIC miners.
Ordering procedure:
Place your order online.
You will be issued a reservation invoice.
We place an order with the supplier at the moment of receipt of payment.
We will inform you on the promised date that we already have the tracking number of the package and that the miner is on its way to us.
You pay the remaining part of the invoice and take over ASIC undermine.
Setup and training
We will set up the miner for you for free so that it can mine for you. We will also train you for free on how to properly secure your cryptocurrency wallet and recommend which exchanges to use.
We can leave the miner at our store or on hosting before you pick it up, so that you don't lose money by not using the equipment for mining and not earning.
Reservation delivery guarantee
When there is a problem and the delivery is delayed for an inadequate reason, we solve it by combining several measures:
We request an additional discount from the manufacturer.
We will provide an additional discount from our side.
We pay the difference of the lost mining profit against the promised delivery date.
We are refunding the customer.
Housing
Miner Hosting Locations ASIC
Hosting in the Czech Republic – 1 hour from Prague
Location: Ústí nad Labem Region, Czech Republic (1 hour from Prague)
Electricity price: 3,2 CZK/kWh excluding VAT
Price for housing: 0 CZK/month (includes service and support)
Price for installation ASICu: 2 CZK (currently free)
advantages:
Guaranteed housing in the PcPraha Kentino data center
Physical availability and possibility of personal inspection of miners
Payment for electricity only after it is billed
Disadvantages: Limited capacity
Best for: ICERIVER miners, Jasminer miners, Antminer Bitmain
Free capacity: 800 kW
Installation time: to 48 hours
Note: Housing is with a soft binding - a great choice for customers who want to be sure that their device is safe.
Antminer S21 (200Th) model from the company Bitmain mining algorithm SHA-256 with a maximum hashrate of 210Th/s with a power consumption of 3500W Performance
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