Bitmain Antminer S9 (12.5Th) vs Bitmain Antminer S9k (13.5Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9 (12.5Th) | Specification | Bitmain Antminer S9k (13.5Th) |
|---|---|---|
| 12.5 TH/s | Taux de hachage | 13.5 TH/s |
| 1,225 W | Consommation électrique | 1,310 W |
| 98.0 J/TH | Efficiency | 97.0 J/TH |
| — | Niveau de bruit | — |
| 4,200.0 kg | Weight | 4,200.0 kg |
| 4,180 BTU/hr | BTU Output | 4,470 BTU/hr |
| 31/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S9 (12.5Th)
Bitmain Antminer S9k (13.5Th)
Based on BTC price of $76,901 and current network difficulty as of May 18, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S9k (13.5Th) edges it: 2 of 4 factors go its way (efficacité, hashrate). The standout gap is 8% more hashrate (12.5 vs 13.5 TH/s) in the Bitmain Antminer S9k (13.5Th)'s favour. The Bitmain Antminer S9 (12.5Th) claws back ground on 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
Stripped to the numbers, this is how far apart the Bitmain Antminer S9 (12.5Th) and Bitmain Antminer S9k (13.5Th) sit on each measurable spec:
- Bitmain Antminer S9k (13.5Th) 8% more hashrate (12.5 vs 13.5 TH/s)
- Bitmain Antminer S9 (12.5Th) 6% better power draw (1,225 vs 1,310 W)
- Bitmain Antminer S9k (13.5Th) 1% better efficacité (98.0 vs 97.0 J/TH)
- Bitmain Antminer S9k (13.5Th) 7% more heat output (4,180 vs 4,470 BTU/hr)
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.
| Bitmain Antminer S9 (12.5Th) | Metric | Bitmain Antminer S9k (13.5Th) |
|---|---|---|
| $65 | Upfront cost (MSRP) | $600 |
| -$2.50 | Daily net profit | -$2.67 |
| -$977 | Net after 1 year | -$1,573 |
| -$1,888 | Net after 2 years | -$2,546 |
| -$2,800 | Net after 3 years | -$3,520 |
| 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
TieBoth miners are equally suitable for home use.
Best for Efficiency
Bitmain Antminer S9k (13.5Th)97.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S9 (12.5Th) vs Bitmain Antminer S9k (13.5Th): which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9 (12.5Th) is more profitable at $-2.50/day compared to $-2.67/day for the Bitmain Antminer S9k (13.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S9 (12.5Th) or the Bitmain Antminer S9k (13.5Th) better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Bitmain Antminer S9 (12.5Th) vs Bitmain Antminer S9k (13.5Th): which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
How far apart are the Bitmain Antminer S9 (12.5Th) and Bitmain Antminer S9k (13.5Th) on J/TH?
The Bitmain Antminer S9 (12.5Th) runs at 98.0 J/TH while the Bitmain Antminer S9k (13.5Th) runs at 97.0 J/TH — a difference of 1.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 1% better efficacité (98.0 vs 97.0 J/TH).