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
ETCHash · air-cooled
NVIDIA GeForce RTX 4090
The strongest consumer GPU for Ethereum Classic and genuinely usable at home, though the card costs far more than its mining return alone justifies. Its resale market is the real hedge.
At your electricity rate
$/kWh
Operating profit
-$0.432
per day · 0.00000000 ETC
Break-even electricity
$0.00
per kWh · $0.06 below your rate
Payback period
—
No payback while the machine runs at a loss
Revenue / day$0.00
Electricity / day$0.432
Energy / day7.2 kWh
Revenue assumes a 1% pool fee at the current ETC 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 Payback needs a hardware cost, which we do not publish because we have no verified retailer feed — add your own purchase price in the calculator.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 | NVIDIA |
|---|---|
| Model | GeForce RTX 4090 |
| Algorithm | ETCHash |
| Coins | Ethereum Classic |
| Hashrate | 260 MH/s |
| Power | 300 W |
| Efficiency | 1.2 W/MH |
| Cooling | Air |
| Type | GPU |
| Released | 2022 |
| Home suitable | Yes |
Data provenance
Community-reported hashrate at stock settings. Last verified 2026-07-31.
Note: GPU hashrate varies substantially with memory tuning, power limit and driver version. Treat this as a mid-range figure, not a guaranteed 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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