S9 Silent

The 21ENERGY S9 Silent includes:

• a used and refurbished Bitmain Antminer S9 with 12.5 TH/s
• a used and functional Bitmain APW3++ power supply
• 2 pieces of 140 mm Noctua high-performance fans – NF-A14 iPPC-3000 PWM instead of the original 120 mm fans
• 2 pieces of ventilation adapters from 120 mm to 140 mm made of 1.5 mm galvanized sheet metal.
• Aluminum sealing tape for an absolutely airtight ventilation adapter.
• 1 extremely quiet 60 mm Noctua fan – NF-A6x25 PWM. This is installed in the power supply and replaces the much louder original power supply fan. A 2-to-3 pin fan cable adapter is also installed in the power supply.
• The Bitmain Antminer S9 comes with the current Braiins OS+ with autotuning and powertarget function.
• Operable with 380 to 1000watts, and even less power when disconnecting hashboards.
• Efficiency of up to 75 J/TH at 700 to 800 watts.
• Bitmain Antminer operating manual.
• The bundle is delivered fully assembled.
• The miner is tested for functionality, cleaned*, and well-protected before shipping.

*Cleaning of the miner is done using an air pressure nozzle to remove dust from the cooling fins. There may still be very small dust particles in the cooling fins, and the miners may still be slightly dusty on the outside. After air pressure cleaning, the miner is reassembled and tested.