Antminer K7 vs Bitmain Antminer S9j (14.5Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S9j (14.5Th) |
|---|---|---|
| 63.5 TH/s | Taux de hachage | 14.5 TH/s |
| 3,080 W | Consommation électrique | 1,350 W |
| 48.5 J/TH | Efficiency | 93.1 J/TH |
| 75 dB | Niveau de bruit | — |
| 14.0 kg | Weight | 4,200.0 kg |
| 10,509 BTU/hr | BTU Output | 4,606 BTU/hr |
| 36/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| Eaglesong | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer S9j (14.5Th)
Based on BTC price of $78,095 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Antminer K7 comes out ahead — it takes 4 of 6 (efficacité, hashrate, score de minage domestique, niveau sonore). The standout gap is 338% more hashrate (63.5 vs 14.5 TH/s) in the Antminer K7's favour. The Bitmain Antminer S9j (14.5Th) holds the edge in consommation électrique and rapport qualité-prix. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the Antminer K7 and Bitmain Antminer S9j (14.5Th) actually differ, with the gap quantified:
- Antminer K7 338% more hashrate (63.5 vs 14.5 TH/s)
- Bitmain Antminer S9j (14.5Th) 56% better power draw (3,080 vs 1,350 W)
- Antminer K7 48% better efficacité (48.5 vs 93.1 J/TH)
- Antminer K7 100% better weight (14.0 vs 4,200.0 kg)
- Antminer K7 128% more heat output (10,509 vs 4,606 BTU/hr)
- Antminer K7 16% more score de minage domestique (36.0 vs 31.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Antminer K7 | Metric | Bitmain Antminer S9j (14.5Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $65 |
| -$5.11 | Daily net profit | -$2.72 |
| -$5,365 | Net after 1 year | -$1,057 |
| -$7,230 | Net after 2 years | -$2,050 |
| -$9,095 | Net after 3 years | -$3,042 |
| 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
Antminer K748.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer K7 or the Bitmain Antminer S9j (14.5Th)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9j (14.5Th) is more profitable at $-2.72/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.
Is the Antminer K7 or the Bitmain Antminer S9j (14.5Th) better for noise-sensitive spaces?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer S9j (14.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Antminer K7 or the Bitmain Antminer S9j (14.5Th)?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer S9j (14.5Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer K7 vs Bitmain Antminer S9j (14.5Th): how much does the efficiency gap matter?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S9j (14.5Th) runs at 93.1 J/TH — a difference of 44.6 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 48% better efficacité (48.5 vs 93.1 J/TH).