Antminer K7 vs Bitmain Antminer Z9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer Z9 |
|---|---|---|
| 63.5 TH/s | Hashrate | 42.0 Ksol/s |
| 3,080 W | Power Consumption | 970 W |
| 48.5 J/TH | Efficiency | 23.1 J/TH |
| 75 dB | Noise Level | — |
| 14.0 kg | Weight | 4,700.0 kg |
| 10,509 BTU/hr | BTU Output | 3,310 BTU/hr |
| 36/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer Z9
Based on BTC price of $78,175 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
The Antminer K7 and Bitmain Antminer Z9 finish in a near dead heat in our weighted scoring. There is no wrong answer here — let your electricity rate, noise tolerance and budget break the tie using the breakdowns above.
Spec Deltas
The Antminer K7 and Bitmain Antminer Z9 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer K7 51% more hashrate (63.5 vs 42.0 TH/s)
- Bitmain Antminer Z9 69% better power draw (3,080 vs 970 W)
- Bitmain Antminer Z9 52% better efficiency (48.5 vs 23.1 J/TH)
- Antminer K7 100% better weight (14.0 vs 4,700.0 kg)
- Antminer K7 218% more heat output (10,509 vs 3,310 BTU/hr)
- Antminer K7 16% more home mining score (36.0 vs 31.0)
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 |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | — |
| -$5.11 | Daily net profit | -$0.82 |
| -$5,364 | Net after 1 year | -$298 |
| -$7,229 | Net after 2 years | -$596 |
| -$9,093 | Net after 3 years | -$895 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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 Z923.1 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer K7 or Bitmain Antminer Z9 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z9 is more profitable at $-0.82/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: which runs at a lower noise level?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer Z9 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer K7 vs Bitmain Antminer Z9: which fits a residential setup better?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer Z9). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer K7 vs Bitmain Antminer Z9: how much does the efficiency gap matter?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer Z9 runs at 23.1 J/TH — a difference of 25.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 52% better efficiency (48.5 vs 23.1 J/TH).