Antminer K7 vs Bitmain Antminer Z9 Mini
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer Z9 Mini |
|---|---|---|
| 63.5 TH/s | Hashrate | 10.0 Ksol/s |
| 3,080 W | Power Consumption | 300 W |
| 48.5 J/TH | Efficiency | 30.0 J/TH |
| 75 dB | Noise Level | — |
| 14.0 kg | Weight | — |
| 10,509 BTU/hr | BTU Output | 1,024 BTU/hr |
| 36/100 | Home Mining Score | 34/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer Z9 Mini
Based on BTC price of $78,175 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer Z9 Mini comes out ahead — it takes 3 of 6 (efficiency, power consumption, price-performance). Where it pulls away hardest is 90% better power draw (3,080 vs 300 W). The Antminer K7 holds the edge in hashrate and home mining score and noise level. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer K7 and Bitmain Antminer Z9 Mini sit on each measurable spec:
- Antminer K7 535% more hashrate (63.5 vs 10.0 TH/s)
- Bitmain Antminer Z9 Mini 90% better power draw (3,080 vs 300 W)
- Bitmain Antminer Z9 Mini 38% better efficiency (48.5 vs 30.0 J/TH)
- Antminer K7 927% more heat output (10,509 vs 1,024 BTU/hr)
- Antminer K7 6% more home mining score (36.0 vs 34.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Antminer K7 | Metric | Bitmain Antminer Z9 Mini |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $150 |
| -$5.11 | Daily net profit | -$0.36 |
| -$5,364 | Net after 1 year | -$281 |
| -$7,229 | Net after 2 years | -$413 |
| -$9,093 | Net after 3 years | -$544 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer K7Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer Z9 Mini30.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer K7 vs Bitmain Antminer Z9 Mini: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z9 Mini is more profitable at $-0.36/day compared to $-5.11/day for the Antminer K7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer K7 vs Bitmain Antminer Z9 Mini: which runs at a lower noise level?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer Z9 Mini at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer K7 or Bitmain Antminer Z9 Mini?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 34/100 for the Bitmain Antminer Z9 Mini). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer K7 and Bitmain Antminer Z9 Mini on J/TH?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer Z9 Mini runs at 30.0 J/TH — a difference of 18.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 38% better efficiency (48.5 vs 30.0 J/TH).