SHA-256 · air-cooled
A previous-generation machine at 23 W/TH. Only viable on genuinely cheap power, and the first to fall below break-even when difficulty rises. Buy on price per terahash, not on specification.
Operating profit
-$0.0715
per day · 0.00005034 BTC
Break-even electricity
$0.0589
per kWh · $0.00108 below your rate
Payback period
—
No payback while the machine runs at a loss
Revenue assumes a 1% pool fee at the current BTC price and network difficulty, with the machine running continuously. Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator. Your rate is saved in this browser and applies across the site.
| Manufacturer | Bitmain |
|---|---|
| Model | Antminer S19k Pro |
| Algorithm | SHA-256 |
| Coins | Bitcoin |
| Hashrate | 120 TH/s |
| Power | 2,760 W |
| Efficiency | 23.0 W/TH |
| Cooling | Air |
| Type | ASIC |
| Released | 2023 |
| Home suitable | No — noise and power draw |
| Noise | 75 dB |
| Weight | 12.8 kg |
| Operating temperature | 0 to 40 °C |
Data provenance
Manufacturer datasheet as published by retailers; hashrate and power corroborated across multiple sources. Last verified 2026-08-03.
Note: Sellers disagree on this machine's dimensions — 400 × 195 × 290 mm and 195 × 290 × 370 mm both appear — so we have left the figure out rather than pick one.
Any field not listed above is one we could not verify for this machine. We would rather leave a row out than publish a figure you cannot check. Where published sources disagree, we say so instead of picking one. How we verify specifications.
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The seven-day average passed 1,000 EH/s for the first time since March 3, and chain data shows difficulty already 5.92% higher since October 16, with another increase due around October 29.
Release 34-106659 approves Cboe binary contracts on indicators that 23 listed companies report, and Marathon Digital Holdings' list covers BTC produced, blocks won, total holdings and energized hashrate. Settlement reads the figure in the company's SEC filing rather than its earnings press release, and nothing can list until Cboe Clear U.S. is registered as a clearing agency.
The miner agreed to buy an 80-megawatt Ethiopian site almost two years ago, and on September 28 the facility's power supplier gave its operator ten days to pay a disputed bill or lose collateralized equipment. BitFuFu says it is weighing termination and arbitration against the sellers.
