Antminer K7 vs Bitmain Antminer S9 Hydro (18Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S9 Hydro (18Th) |
|---|---|---|
| 63.5 TH/s | Hashrate | 18.0 TH/s |
| 3,080 W | Power Consumption | 1,728 W |
| 48.5 J/TH | Efficiency | 96.0 J/TH |
| 75 dB | Noise Level | — |
| 14.0 kg | Weight | 5,150.0 kg |
| 10,509 BTU/hr | BTU Output | 5,896 BTU/hr |
| 36/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer S9 Hydro (18Th)
Based on BTC price of $79,091 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Antminer K7, which leads on 4 of 5 weighted factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 253% more hashrate (63.5 vs 18.0 TH/s). That said, the Bitmain Antminer S9 Hydro (18Th) isn't beaten everywhere — it still wins power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Antminer K7 and Bitmain Antminer S9 Hydro (18Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer K7 253% more hashrate (63.5 vs 18.0 TH/s)
- Bitmain Antminer S9 Hydro (18Th) 44% better power draw (3,080 vs 1,728 W)
- Antminer K7 49% better efficiency (48.5 vs 96.0 J/TH)
- Antminer K7 100% better weight (14.0 vs 5,150.0 kg)
- Antminer K7 78% more heat output (10,509 vs 5,896 BTU/hr)
- Antminer K7 29% more home mining score (36.0 vs 28.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Antminer K7 | Metric | Bitmain Antminer S9 Hydro (18Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | — |
| -$5.08 | Daily net profit | -$3.49 |
| -$5,355 | Net after 1 year | -$1,275 |
| -$7,209 | Net after 2 years | -$2,549 |
| -$9,064 | Net after 3 years | -$3,824 |
| 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
Antminer K748.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer K7 or the Bitmain Antminer S9 Hydro (18Th)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9 Hydro (18Th) is more profitable at $-3.49/day compared to $-5.08/day for the Antminer K7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer K7 or Bitmain Antminer S9 Hydro (18Th)?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer S9 Hydro (18Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer K7 vs Bitmain Antminer S9 Hydro (18Th): which fits a residential setup better?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer S9 Hydro (18Th)). 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 S9 Hydro (18Th) on J/TH?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S9 Hydro (18Th) runs at 96.0 J/TH — a difference of 47.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 49% better efficiency (48.5 vs 96.0 J/TH).