Antminer S21 lmm.
Original price was: $4,368.00.$3,333.00Current price is: $3,333.00.
The Antminer S21 Imm. is a next-gen SHA-256 miner built for oil-immersion cooling. It features dual modes: 301 TH/s at 5569W (High Energy) or 239 TH/s at 3824W (Normal Energy). With a 16.0 J/TH efficiency and ultra-quiet 50 dB operation, it maximizes chip longevity and stability for professional-scale operations.
Description
Antminer S21 lmm.
Are you looking for a high-performance Bitcoin miner designed for modern large-scale mining farms? The Antminer S21 Imm. from Bitmain is a powerful immersion-cooled ASIC miner built to deliver strong SHA-256 hashing performance while maintaining efficient energy usage through advanced immersion-cooling technology.
The Antminer S21 Imm. operates on the SHA-256 algorithm, making it suitable for mining Bitcoin (BTC) and other SHA-256 cryptocurrencies such as Bitcoin Cash (BCH) and Bitcoin SV (BSV). This immersion-cooled miner delivers a maximum hashrate of around 300–335 TH/s while consuming approximately 4800–5360W of power, resulting in an efficiency of about 16 J/TH depending on the configuration.
Built for immersion-cooling environments, the miner is designed to operate submerged in dielectric cooling fluid instead of using traditional air or hydro cooling. This immersion architecture allows the S21 Imm. to maintain stable performance at over 300 TH/s while drawing roughly 4.8–5.3 kW of power, while also reducing operational noise and improving thermal stability during continuous mining workloads.
The Antminer S21 Imm. is typically deployed inside immersion cooling tanks or containerized immersion mining infrastructure, where the cooling liquid removes heat directly from the ASIC chips and transfers it through external heat exchangers. This design enables higher hardware density and improved reliability for industrial mining environments.
With over 300 TH/s SHA-256 hashing power, approximately 4.8–5.3 kW power consumption, and an optimized immersion-cooling architecture, the Antminer S21 Imm. provides a powerful and efficient solution for modern Bitcoin mining facilities that require high-density deployments and advanced thermal management.
Antminer S21 lmm. – Technical Specifications
- Hashrate: 239 TH/s (Normal Energy Mode) / 301 TH/s (High Energy Mode)
- Power Consumption: 3824 W (NEM) / 5569 W (HEM)
- Efficiency: 16.0 J/TH (NEM) / 18.5 J/TH (HEM)
- Algorithm: SHA256 (BTC/BCH/BSV)
- Chip: BM1368PM
- Cooling: Oil immersion
- Dimensions: 293 x 236 x 364 mm
- Weight: 17.15 kg (Net) / 20.45 kg (Gross)
- Operating Temperature: 30 – 55 °C (Inlet oil temperature)
- Humidity: 10 – 90% (non-condensing)
- Noise Level: 50 dB
- Network Connection: RJ45 Ethernet 10/100M
- Voltage: 380 – 415 V (3-phase)
Notes
- Payment accepted in USDT, USDC, BTC, or USD. The unit price and total price of the products, and the amount paid are denominated in U.S. dollars.
- The shipping costs, customs charges, and taxes(if any) are not included in the retail price shown above.
- After an order has been submitted, a request to cancel the order, refund any part of the ordered amount or change the ordered item(s) to different item(s) or different batch(es) will not be entertained by BITMAIN.
- The pictures shown are for reference only; the final shipment version shall prevail.
- The Hashrate value, Power on wall, and Power efficiency on wall are all typical values, The actual Hashrate value fluctuates by ±3%, and the actual Power on wall and Power efficiency on wall fluctuate by ±5%.
- Caution: Wrong input voltage may probably cause product damaged.
Shipping Details
- Shipments will be scheduled on a first-paid-first-ship basis for orders on which BITMAIN has received full payment.
- You are responsible for any customs delays or returned shipments due to a lack of proper documentation. It’s highly recommended to be aware of local customs clearance policies and to prepare all customs documentation ahead of time to avoid any customs clearance delays or unexpected costs.
Warranty
- A 365-day warranty is provided starting from the shipping date. BITMAIN will cover shipping costs when shipping a replacement unit within the warranty period.
- The warranty only applies to the original purchaser who purchased the machine directly from BITMAIN. Once the miner is resold, warranty coverage becomes the responsibility of the re-seller.
- If the user fails to use the product per the given instructions, specifications, and conditions provided or changes the function settings of the unit without BITMAIN’s prior consent, BITMAIN will not be liable for any damage arising there from.
Additional information
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48 reviews for Antminer S21 lmm.
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Maria Schneider –
Fast shipping and reliable product. Exactly as described. Great mining performance.
Catherine Leroy –
My Antminer arrived quickly and Packaging was secure and neat. Very reliable seller.
Maximilian Koch –
Super smooth purchase of my Antminer! Performance is top-notch. Thumbs up!
Thomas Smith –
Fast shipping and reliable product. The unit works flawlessly. Worth every penny.
Lina Schäfer –
Fast shipping and reliable product. The unit works flawlessly. Smooth transaction.