
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.
Equihash · air-cooled
Equihash hardware is a thin market with few buyers, so resale is harder than for SHA-256. Treat the payback figure as less reliable than the headline suggests.
Operating profit
-$4.00
per day · 0.00000046 ZEC
Break-even electricity
$0.000008
per kWh · $0.06 below your rate
Payback period
—
No payback while the machine runs at a loss
Revenue assumes a 1% pool fee at the current ZEC 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 Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator.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 Z15 Pro |
| Algorithm | Equihash |
| Coins | Zcash |
| Hashrate | 840 KSol/s |
| Power | 2,780 W |
| Efficiency | 3.3 W/KSol |
| Cooling | Air |
| Type | ASIC |
| Released | 2022 |
| Home suitable | No — noise and power draw |
| Dimensions | 428 × 195 × 290 mm |
| Weight | 16.9 kg |
| Operating temperature | 0 to 40 °C |
| Warranty | 180 days |
Data provenance
Manufacturer datasheet as published by retailers; hashrate and power corroborated across multiple sources. Last verified 2026-08-03.
Note: We previously published 2,500 W for this model, which was wrong — the datasheet figure is 2,780 W. The published efficiency of 3.31 J/Ksol confirms it (2,780 ÷ 840). The correction lowers its break-even electricity price by roughly a tenth. Sound ratings vary between 72 dB and 75 dB, so none is listed.
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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