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Rectangular silver metal miner with two front fans, Ethernet port visible, 400 by 195 by 290 millimetres

AFRNDK

AFRNDK Antminer S21 Pro 234Th/s 3510W Air-cooling mining hardware

SKU CH-J6DQ-C60YZ

SHA-256 Bitcoin miner delivering 234 Th/s at 3510 W with dual-fan air cooling in a 400 x 195 x 290 mm chassis

  • TypeMining Machine/Miner
  • Crypto AlgorithmSHA 256
  • Compatible CurrencyBitcoin (BTC)
  • Hashrate234Th/s
  • Power Consumption3510W
  • 234 terahashes per second for high Bitcoin throughput
  • 3510 watt power draw for efficient energy use
  • Air cooling with two fans keeps operation stable
  • 220 to 240 volt input matches standard industrial supply
  • 75 decibel noise level suits dedicated mining spaces

Antminer S21 Pro 234Th/s SHA-256 Miner

The AFRNDK Antminer S21 Pro is an air-cooled SHA-256 mining machine built for Bitcoin. It delivers a rated 234Th/s hashrate at 3510W power draw and operates on 220V-240V input. The unit measures 400 x 195 x 290mm and uses dual fans producing 75db noise.

Upgrade from S19 Pro or M50 class units

Moving to the S21 Pro makes sense when electricity cost allows the higher 3510W draw to be offset by the 234Th/s output. The efficiency gain over S19 Pro or Whatsminer M50 tiers can shorten payback if power rates stay below the threshold where the extra wattage erodes margin.

234Th/s headroom within 5-45 °C range

At stock settings the miner sustains 234Th/s continuously while ambient temperature stays between 5 and 45 °C and humidity 5 to 95 %. Beyond that thermal envelope the control board will throttle clocks to protect hardware, reducing daily Bitcoin yield until conditions improve.

Highlights

  • 234 terahashes per second for high Bitcoin throughput
  • 3510 watt power draw for efficient energy use
  • Air cooling with two fans keeps operation stable
  • 220 to 240 volt input matches standard industrial supply
  • 75 decibel noise level suits dedicated mining spaces

Specifications

BrandANTMINER
SeriesS21
ModelS21 PRO
TypeMining Machine/Miner
Crypto AlgorithmSHA 256
Compatible CurrencyBitcoin (BTC)
Hashrate234Th/s
Power Consumption3510W

Questions about this item

What are the physical dimensions of the Antminer S21 Pro 234Th/s?

The unit measures 400 x 195 x 290 mm, so allow at least that clearance in any rack or shelf.

Which step is most often missed when installing the Antminer S21 Pro 234Th/s?

Supplying the correct 220-240 V input; feeding it a lower voltage can damage the miner.

When will the two cooling fans on the Antminer S21 Pro 234Th/s need replacement?

Expect fan service once bearings become noisy or airflow drops, typically after extended 24/7 operation.

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