Bitmain Antminer S9i (13Th) vs Bitmain Antminer S9j (14.5Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9i (13Th) | Specification | Bitmain Antminer S9j (14.5Th) |
|---|---|---|
| 13.0 TH/s | Hashrate | 14.5 TH/s |
| 1,280 W | Power Consumption | 1,350 W |
| 98.5 J/TH | Efficiency | 93.1 J/TH |
| — | Noise Level | — |
| 4,200.0 kg | Weight | 4,200.0 kg |
| 4,367 BTU/hr | BTU Output | 4,606 BTU/hr |
| 31/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S9i (13Th)
Bitmain Antminer S9j (14.5Th)
Based on BTC price of $79,271 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S9j (14.5Th) edges it: 3 of 4 factors go its way (efficiency, hashrate, price-performance). The standout gap is 12% more hashrate (13.0 vs 14.5 TH/s) in the Bitmain Antminer S9j (14.5Th)'s favour. That said, the Bitmain Antminer S9i (13Th) isn't beaten everywhere — it still wins power consumption. 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 S9i (13Th) and Bitmain Antminer S9j (14.5Th) sit on each measurable spec:
- Bitmain Antminer S9j (14.5Th) 12% more hashrate (13.0 vs 14.5 TH/s)
- Bitmain Antminer S9i (13Th) 5% better power draw (1,280 vs 1,350 W)
- Bitmain Antminer S9j (14.5Th) 5% better efficiency (98.5 vs 93.1 J/TH)
- Bitmain Antminer S9j (14.5Th) 5% more heat output (4,367 vs 4,606 BTU/hr)
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.
| Bitmain Antminer S9i (13Th) | Metric | Bitmain Antminer S9j (14.5Th) |
|---|---|---|
| $65 | Upfront cost (MSRP) | $65 |
| -$2.60 | Daily net profit | -$2.71 |
| -$1,013 | Net after 1 year | -$1,055 |
| -$1,961 | Net after 2 years | -$2,044 |
| -$2,910 | Net after 3 years | -$3,034 |
| 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 S9j (14.5Th)93.1 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S9i (13Th) or Bitmain Antminer S9j (14.5Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9i (13Th) is more profitable at $-2.60/day compared to $-2.71/day for the Bitmain Antminer S9j (14.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S9i (13Th) or Bitmain Antminer S9j (14.5Th)?
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 S9i (13Th) or the Bitmain Antminer S9j (14.5Th)?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
What is the efficiency difference between Bitmain Antminer S9i (13Th) and Bitmain Antminer S9j (14.5Th)?
The Bitmain Antminer S9i (13Th) runs at 98.5 J/TH while the Bitmain Antminer S9j (14.5Th) runs at 93.1 J/TH — a difference of 5.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 5% better efficiency (98.5 vs 93.1 J/TH).