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On May 11, the Bitcoin network experienced its third block reward halving, which had chopped the 12.5 BTC reward to 6.25 coins following the event. Its been close to a week later, and data stemming from mining rig profitability websites show that more than 45 older generation devices are not profitable right now at todays bitcoin exchange rates.

Recent research analysis by 8btc columnist Vincent He and the cryptocurrency mining operation F2pool, indicates that roughly 45 older mining devices have been shut down overnight since the reward halving. Statistics from the web portal Asicminervalue.com, also indicate that the estimate of 45 miners is based on the electrical price of 0.35 Chinese yuan per kilowatt-hour (kWh) or $0.049 USD.

The best mining device out of the entire slew of unprofitable mining rigs would be Bitmains Antminer S11 (20.5 TH/s), which still loses $0.09 per day at $0.049 per kWh. Other machines that are not making profits at this rate, include the Bitfury Tardis, Antminer S9 SE, GMO Miner B2, Innosilicon T2 Turbo, Bitfily Snow Panther B1, Canaan Avalonminer 921, and the popular Antminer S9. Data shows that at $0.049 per kWh, Bitfurys B8 released in 2017 with 49 TH/s, suffers a deep loss of more than $3 a day.

According to Vincent He, with the electric charge of 0.3 Chinese yuan per kWh, the electric charge of an S9 can account for 140% of the whole cost. The Chinese mining operation F2pool states:

Now, only when the price of the bitcoin rises to $15,000, can Antminer S9 cover the cost. In the past, even if there were a mining disaster and the price dump of the mining machine, someone would still buy S9. Most of the recipients are the owners of large mining farms. When the bitcoin price recovers, they can mine it by themselves or sell it to others to earn the difference.

Two days ago, the crypto community finally could observe the loss of SHA256 hashrate that followed the reward halving on May 11. On May 11, the overall BTC hashrate was 121 exahash per second (EH/s) and on May 15, 2020, the overall hashrate is around 110 EH/s. However, statistics from Fork.lols 12-hour intervals show the hashpower could be even lower than that today. These statistics would indicate that a number of operations that leverage older-generation mining rigs, likely fell off the map.

Now everyone knows that in places like China, Central Asia, and Iran, some miners can get free electricity or pay as little as $0.02 per kWh. So taking metrics from Asicminervalue.com and changing the electrical cost to $0.02 per kWh, indicates that only eight mining rigs are unprofitable at that energy rate. Mining rigs that cannot profit at 2 cents per kWh include the Whatsminer M3X, Avalonminer 741, Whatsminer M3, Antminer S7-LN, Antminer S3, Antminer V9, Antminer S7, and the Antminer S5. These eight machines are losing anywhere between $0.09 to $0.19 per day respectively at current BTC exchange rates.

Vincent Hes report also notes that the well known Antminer S9 had also dropped in value on secondary markets almost overnight. The Chinese reporter claims that $100 has been removed from most peoples listings and an older generation Antminer S9 will sell for 100 Chinese yuan (about $14). Years ago, the S9s with 13 TH/s or above accounted for more than 70% of the SHA256 hashrate. The report also highlights that a mining operation owner from the Sichuan province sold his small farm with 8,000 mining rigs and six transformers roughly seven days prior to the halving event. The 8,000 mining rig farm owner, Zhou Wenbo, told the columnist that the buyer was not willing to take his older generation Antminer S9s, Avalonminers, and Innosilicon Terminator 2 machines.

If the data is changed back to $0.05 per kWh again, theres a great number of next-generation miners that are still very profitable at todays exchange rates. This includes the Antminer S19 Pro (110 TH/s), Antminer S19 (95 TH/s), Whatsminer M30S (86 TH/s), Antminer S17 (73 TH/s), and the Whatsminer M31S (70 TH/s). All of these mining devices make between $6-15 per day at $0.05 per kWh.

What do you think about the large number of unprofitable older generation miners? Let us know in the comments below.

Image Credits: Shutterstock, Pixabay, Wiki Commons, Asicminervalue.com, Ebay, Fork.lol, Blockchain.com

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45 Older-Generation Bitcoin Miners Are Unprofitable After the Reward Halving - Bitcoin News