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Antminer S9, S9i, and S9j: A Comparison of Bitcoin Mining Hardware

The Antminer S9 series is a line of Bitcoin mining hardware developed by Bitmain. The series was first released in 2016 and has since become one of the most popular Bitcoin mining ASICs on the market. The Antminer S9, S9i, and S9j are all part of this series and offer different levels of performance and efficiency.

Antminer S9

The Antminer S9 was the first in the series and was released in 2016. It has a hash rate of 14 terahashes per second (TH/s) and consumes 1350 watts of power. The S9 is a relatively noisy miner and is not ideal for home use.

Antminer S9i

The Antminer S9i was released in 2017 and is an improved version of the S9. It has a hash rate of 14.5 TH/s and consumes 1320 watts of power. The S9i is slightly more efficient than the S9 and is also quieter.

Antminer S9j

The Antminer S9j was released in 2018 and is the most efficient miner in the S9 series. It has a hash rate of 14.5 TH/s and consumes 1290 watts of power. The S9j is also the quietest miner in the series. 

The following table compares the three miners in the Antminer S9 series:

Feature Antminer S9 Antminer S9i Antminer S9j
Hash rate 14 TH/s 14.5 TH/s 14.5 TH/s
Power consumption 1350 watts 1320 watts 1290 watts
Noise level Loud Moderate Quiet
Modified firmware Available Available Available


The Antminer S9 series is a popular choice for Bitcoin miners. The S9j is the most efficient miner in the series and is also the quietest. However, it is also the most expensive. The S9i is a good compromise between performance and efficiency. The S9 is the least efficient miner in the series, but it is also the cheapest.

Which Antminer S9 Series Miner is Right for You?

The best Antminer S9 series miner for you will depend on your individual needs and budget. If you are looking for the most efficient miner, the S9j is the best option. If you are looking for a good compromise between performance and efficiency, the S9i is a good choice. If you are on a budget, the S9 is the least expensive option.

Antminer S9 is still profitable after Bitcoin Halving 2020. Download my Firmware fow Antminer S9 and you will have more efficient bitcoing S9 miners then anytime earlier.

Profitable custom mining FIRMWARE S9, S9i, S9j for download


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Specification of Firmware

for Antminer S9, S9i, S9j


  • Custom Firmware for: Antminer S9, S9i, S9j (all versions)
  • Bitmain Antminer S9 (12.5-13-13.5-14Th/s)
    Bitmain Antminer S9i (14-14.5TH/s)
    Bitmain Antminer S9j (14-14.5TH/s)
  • Version 3.3 - 2023-04-11!! (BigMiner Firmware without Fee from Mining!)
  • Efficiency: 20-35% (Better then Blissz firmware! Better then
  • UnOfficial Bitmain Firmware for Antminer S9, S9i, S9j noFee (From BigMiner)
  • Recommended, at your current firmware, set the miner frequency at 400mhz and set your fan speed manual at 25% before flashing.
  • Download the custom firmware. (dont unpack it)
  • Flash by going to "System" -> "Upgrade" -> "Flash new firmware image" and select the custom firmware.
  • After flashing, check the advanced settings page and start at the lowest voltage setting and 400mhz. From there increase your frequency to see how high you can go at the lowest voltage setting.
  • Start tweaking some more. See the profile suggestions below.


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