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Blackminer
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FPGA
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Eaglesong
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RELEASED DEC 2019
Blackminer F1-Ultra — ROI calculator
Profit /day
$-2.73
Income /day
$0.00
0.02263 CKB/day
Cost $2.73 @ $0.1/kWh
Hashrate
26.5Gh/s
Eaglesong
Power · Efficiency
1137.0W
42.91 j/Gh
Blackminer F1-Ultra loses $2.73 a day selling raw Eaglesong hashpower at 26.5 Gh/s, pulling 1,137 W from the wall. That's after subtracting power at $0.10/kWh — not quite breaking even at today's rates.
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7 minutes ago
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Tap to switch · 7 sections ROI calculator 6/7
ROI calculator
ROI calculator for Blackminer F1-Ultra
Model payback, electricity, and first-year return for this rig.
Hardware cost
$5,000
Electricity rate
$0.10/kWh
Runtime per day
24
Pool fee
2.0%
Difficulty growth /yr
+0%
Net profit /day
$0.00
after electricity & fees
Payback period
—
—
First-year return
$0
—
Projected cumulative profit
The line crosses $0 on the day you break even. Everything above is pure profit.
Monthly P&L · 3-year horizon
Capital cost is booked in month 1. Cumulative columns include the rig purchase, so Net goes positive at true breakeven.
| Month | Earned (mo) | Cost burned (mo) | Cumulative earned | Cumulative cost | Net | % ROI |
|---|
Profit vs cost
Tap to switch · 7 sections ROI calculator 6/7
ROI calculator
ROI calculator for Blackminer F1-Ultra
Model payback, electricity, and first-year return for this rig.
Hardware cost
$5,000
Electricity rate
$0.10/kWh
Runtime per day
24
Pool fee
2.0%
Difficulty growth /yr
+0%
Net profit /day
$0.00
after electricity & fees
Payback period
—
—
First-year return
$0
—
Projected cumulative profit
The line crosses $0 on the day you break even. Everything above is pure profit.
Monthly P&L · 3-year horizon
Capital cost is booked in month 1. Cumulative columns include the rig purchase, so Net goes positive at true breakeven.
| Month | Earned (mo) | Cost burned (mo) | Cumulative earned | Cumulative cost | Net | % ROI |
|---|
Frequently asked
About the Blackminer F1-Ultra
Is the Blackminer F1-Ultra profitable?
As of October 2026, the Blackminer F1-Ultra earns $-2.73/day mining Eaglesong at an electricity cost of $0.1/kWh. At this electricity rate it is not profitable.
What is the payback period for the Blackminer F1-Ultra?
Payback equals hardware cost divided by daily profit. The ROI calculator on this page projects payback months for the Blackminer F1-Ultra at $0.1/kWh — adjust the electricity rate and the hardware cost to match your scenario. Most miners aim for 12–24 month payback on new hardware.
What's the break-even electricity rate for the Blackminer F1-Ultra?
Break-even electricity is the rate above which the Blackminer F1-Ultra stops being profitable. The calculator below derives it from the rig's revenue and power draw — anything below this rate yields positive daily profit, anything above turns the rig into a net loss.
