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
Equihash · air-cooled
Bitmain Antminer Z15
Half the hashrate of the Z15 Pro at around 60% of the power. Aging hardware on a niche algorithm — a speculative purchase rather than an infrastructure one.
At your electricity rate
$/kWh
Operating profit
-$2.17
per day · 0.00000023 ZEC
Break-even electricity
$0.000007
per kWh · $0.06 below your rate
Payback period
—
No payback while the machine runs at a loss
Revenue / day$0.000246
Electricity / day$2.17
Energy / day36.2 kWh
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 Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator.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.
Specifications
| Manufacturer | Bitmain |
|---|---|
| Model | Antminer Z15 |
| Algorithm | Equihash |
| Coins | Zcash |
| Hashrate | 420 KSol/s |
| Power | 1,510 W |
| Efficiency | 3.6 W/KSol |
| Cooling | Air |
| Type | ASIC |
| Released | 2020 |
| Home suitable | No — noise and power draw |
| Noise | 72 dB |
| Dimensions | 133 × 245 × 290 mm |
| Weight | 9 kg |
| Operating temperature | 5 to 45 °C |
Data provenance
Manufacturer datasheet as published by retailers; hashrate and power corroborated across multiple sources. Last verified 2026-08-03.
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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