Antminer K7 vs Bitmain Antminer Z15
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer Z15 |
|---|---|---|
| 63.5 TH/s | Hashrate | 420.0 Ksol/s |
| 3,080 W | Power Consumption | 1,510 W |
| 48.5 J/TH | Efficiency | 3.6 J/TH |
| 75 dB | Noise Level | — |
| 14.0 kg | Weight | 9,000.0 kg |
| 10,509 BTU/hr | BTU Output | 5,152 BTU/hr |
| 36/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer Z15
Based on BTC price of $78,236 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer Z15 comes out ahead — it takes 4 of 6 (efficiency, hashrate, power consumption, price-performance). The standout gap is 93% better efficiency (48.5 vs 3.6 J/TH) in the Bitmain Antminer Z15's favour. That said, the Antminer K7 isn't beaten everywhere — it still wins home mining score and noise level. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Antminer K7 and Bitmain Antminer Z15 actually differ, with the gap quantified:
- Bitmain Antminer Z15 561% more hashrate (63.5 vs 420.0 TH/s)
- Bitmain Antminer Z15 51% better power draw (3,080 vs 1,510 W)
- Bitmain Antminer Z15 93% better efficiency (48.5 vs 3.6 J/TH)
- Antminer K7 100% better weight (14.0 vs 9,000.0 kg)
- Antminer K7 104% more heat output (10,509 vs 5,152 BTU/hr)
- Antminer K7 29% more home mining score (36.0 vs 28.0)
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 Z15 |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $998 |
| -$5.11 | Daily net profit | $11.50 |
| -$5,364 | Net after 1 year | +$3,198 |
| -$7,227 | Net after 2 years | +$7,395 |
| -$9,091 | Net after 3 years | +$11,591 |
| Does not pay back at current rates (negative daily profit) | Payback period | Pays for itself in ~87 days at current rates |
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
Bitmain Antminer Z15$16.60/day higher profit at current rates.
Best for Home Mining
Antminer K7Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer Z153.6 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer K7 or Bitmain Antminer Z15 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z15 is more profitable at $11.50/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 Z15: which runs at a lower noise level?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer Z15 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer K7 vs Bitmain Antminer Z15: which fits a residential setup better?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer Z15). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer K7 vs Bitmain Antminer Z15: how much does the efficiency gap matter?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer Z15 runs at 3.6 J/TH — a difference of 44.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 93% better efficiency (48.5 vs 3.6 J/TH).