IREN Is Switching Off the Business That Made $578 Million
The miner booked a $638.8 million impairment retiring rigs to clear halls for AI tenants. Its $4 billion contracted run rate is still $3 billion above what is actually operating.
·Tom Chen
SHA-256 · air-cooled
Bitmain Antminer S19k Pro
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.
At your electricity rate
$/kWh
Operating profit
$0.5919
per day · 0.00005860 BTC
Break-even electricity
$0.0689
per kWh · $0.008935 above your rate
Payback period
—
Enter a hardware cost to estimate payback
Revenue / day$4.57
Electricity / day$3.97
Energy / day66.2 kWh
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 Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator.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.
Specifications
| 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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