Antminer S9 is the world’s most powerful Bitcoin miner, which is smaller in size than many other portable boom boxes available. The Antminer S9 has a form factor similar to the very popular Antminer S7. The only difference associated with Antminer S9 is that it has three times more power than that of Antminer S7 and has double efficiency. Each Antminer S9 has 189 chips, which help in delivering more hashrate and efficiency as compared to any other Bitcoin miners till now.
Check the full review here:
https://www.tokens24.com/cryptopedia/mining/antminer-s9-review
