Bitmain Antminer S9 (12.5Th) vs Bitmain Antminer S9i (13Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9 (12.5Th) | Specification | Bitmain Antminer S9i (13Th) |
|---|---|---|
| 12.5 TH/s | Taux de hachage | 13.0 TH/s |
| 1,225 W | Consommation électrique | 1,280 W |
| 98.0 J/TH | Efficiency | 98.5 J/TH |
| — | Niveau de bruit | — |
| 4,200.0 kg | Weight | 4,200.0 kg |
| 4,180 BTU/hr | BTU Output | 4,367 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 S9i (13Th)
Based on BTC price of $78,175 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer S9 (12.5Th) comes out ahead — it takes 2 of 4 (efficacité, consommation électrique). Its biggest concrete edge: 4% better power draw (1,225 vs 1,280 W). That said, the Bitmain Antminer S9i (13Th) isn't beaten everywhere — it still wins hashrate and rapport qualité-prix. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S9 (12.5Th) and Bitmain Antminer S9i (13Th) sit on each measurable spec:
- Bitmain Antminer S9i (13Th) 4% more hashrate (12.5 vs 13.0 TH/s)
- Bitmain Antminer S9 (12.5Th) 4% better power draw (1,225 vs 1,280 W)
- Bitmain Antminer S9i (13Th) 4% more heat output (4,180 vs 4,367 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 S9i (13Th) |
|---|---|---|
| $65 | Upfront cost (MSRP) | $65 |
| -$2.49 | Daily net profit | -$2.60 |
| -$974 | Net after 1 year | -$1,016 |
| -$1,883 | Net after 2 years | -$1,966 |
| -$2,792 | Net after 3 years | -$2,917 |
| 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 S9 (12.5Th)98.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S9 (12.5Th) or the Bitmain Antminer S9i (13Th)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9 (12.5Th) is more profitable at $-2.49/day compared to $-2.60/day for the Bitmain Antminer S9i (13Th). 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 S9i (13Th) better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
For mining at home, should I pick the Bitmain Antminer S9 (12.5Th) or the Bitmain Antminer S9i (13Th)?
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 S9i (13Th) on J/TH?
The Bitmain Antminer S9 (12.5Th) runs at 98.0 J/TH while the Bitmain Antminer S9i (13Th) runs at 98.5 J/TH — a difference of 0.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.