Antminer K7 vs Bitmain Antminer S9 (12.5Th)
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer K7 is the stronger pick — it leads on 3 of 6 head-to-head factors. The Antminer K7 runs 63.5 TH/s; the Bitmain Antminer S9 (12.5Th) runs 12.5 TH/s.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S9 (12.5Th) |
|---|---|---|
| 63.5 TH/s | Taux de hachage | 12.5 TH/s |
| 3,080 W | Consommation électrique | 1,225 W |
| 48.5 J/TH | Efficiency | 98.0 J/TH |
| 75 dB | Niveau de bruit | — |
| 14.0 kg | Weight | 4.2 kg |
| 10,509 BTU/hr | BTU Output | 4,180 BTU/hr |
| 8/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| Eaglesong | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer S9 (12.5Th)
Based on BTC price of $61,651 and current network difficulty as of Jun 25, 2026. Actual results vary.
Verdict
Selon notre analyse multifactorielle, le Antminer K7 l'emporte sur 3 des 6 facteurs (efficacité, hashrate, niveau sonore). Where it pulls away hardest is 408% more hashrate (63.5 vs 12.5 TH/s). That said, the Bitmain Antminer S9 (12.5Th) isn't beaten everywhere — it still wins consommation électrique and score de minage domestique and rapport qualité-prix. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer K7 and Bitmain Antminer S9 (12.5Th) sit on each measurable spec:
- Antminer K7 408% more hashrate (63.5 vs 12.5 TH/s)
- Bitmain Antminer S9 (12.5Th) 60% better power draw (3,080 vs 1,225 W)
- Antminer K7 51% better efficacité (48.5 vs 98.0 J/TH)
- Bitmain Antminer S9 (12.5Th) 70% better weight (14.0 vs 4.2 kg)
- Antminer K7 151% more heat output (10,509 vs 4,180 BTU/hr)
- Bitmain Antminer S9 (12.5Th) 175% more score de minage domestique (8.0 vs 22.0)
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 (12.5Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $65 |
| -$5.42 | Daily net profit | -$2.55 |
| -$5,479 | Net after 1 year | -$997 |
| -$7,458 | Net after 2 years | -$1,928 |
| -$9,437 | Net after 3 years | -$2,860 |
| 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
Bitmain Antminer S9 (12.5Th)Score: 22/100. 0 dB noise level.
Best for Efficiency
Antminer K748.5 J/TH — lower electricity cost per terahash.
Foire aux questions
Is the Antminer K7 or Bitmain Antminer S9 (12.5Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9 (12.5Th) is more profitable at $-2.55/day compared to $-5.42/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 S9 (12.5Th): which runs at a lower noise level?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer S9 (12.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer K7 vs Bitmain Antminer S9 (12.5Th): which fits a residential setup better?
The Bitmain Antminer S9 (12.5Th) scores 22/100 on our Home Mining Score (vs 8/100 for the Antminer K7). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer K7 vs Bitmain Antminer S9 (12.5Th): how much does the efficiency gap matter?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S9 (12.5Th) runs at 98.0 J/TH — a difference of 49.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 51% better efficacité (48.5 vs 98.0 J/TH).