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Antminer S21 lmm.

5.00 out of 5
(48 customer reviews)

Original price was: $4,368.00.Current 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. – 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

Performance (Miner)
Algorithm

SHA-256

Hardware
Model

Antminer S21 Immersion (S21 lmm)

Network Connection

RJ45 Ethernet 10/100M

Power (Container/Rack)
Input Voltage

380-415 V AC

Input Frequency

50-60 Hz

Input Current

12 A

Power
Phase

3-Phase

Power Consumption (NEM Mode)

3824 W ±5%

Power Consumption (HEM Mode)

5569 W ±5%

Performance
Hashrate (NEM Mode)

239 TH/s ±3%

Hashrate (HEM Mode)

301 TH/s ±3%

Power Efficiency (NEM Mode)

16.0 J/TH ±5%

Power Efficiency (HEM Mode)

18.5 J/TH ±5%

Physical
Weight (Net)

17.15 kg

Dimensions (Net)

293 x 236 x 364 mm

Dimensions (Gross)

600 x 390 x 450 mm

Weight (Gross)

20.45 kg

Environmental
Storage Temperature

-20-70 °C

Operating Humidity

10% – 90% (non-condensing)

Noise Level

≤50 dB

Inlet Oil Temperature

30-55 °C

Cooling & Sub-systems
Cooling Method

Oil Immersion Cooling

Cooling
Oil Flow

1 m³/h

48 reviews for Antminer S21 lmm.

  1. 5 out of 5

    Camille Martin

    Just received my Antminer and Highly recommend this seller. Top quality!

  2. 5 out of 5

    Michel Simon

    The ordering process was easy and Better than expected. No regrets.

  3. 5 out of 5

    Pierre Dubois

    Fast shipping and reliable product. No issues at all. Five stars!

  4. 5 out of 5

    Felix Koch

    Fantastic experience ordering my Antminer. Everything went perfectly. Very reliable seller.

  5. 5 out of 5

    William Thompson

    The ordering process was easy and Customer support was helpful. Thumbs up!

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Antminer S21 lmm.
Original price was: $4,368.00.Current price is: $3,333.00.