Antminer S9i vs StealthMiner
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S9i | Specification | StealthMiner |
|---|---|---|
| 14.0 TH/s | Hashrate | 800.0 GH/s |
| 1,320 W | Power Consumption | 18 W |
| 94.3 J/TH | Efficiency | 22.5 J/TH |
| 76 dB | Noise Level | 28 dB |
| 4.2 kg | Weight | 1.5 kg |
| 4,504 BTU/hr | BTU Output | 61 BTU/hr |
| 83/100 | Home Mining Score | 70/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Antminer S9i
StealthMiner
Based on BTC price of $79,084 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the StealthMiner edges it: 3 of 5 factors go its way (efficiency, power consumption, noise level). Where it pulls away hardest is 99% better power draw (1,320.0 vs 18.0 W). The Antminer S9i claws back ground on hashrate and home mining score. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer S9i and StealthMiner sit on each measurable spec:
- Antminer S9i 1650% more hashrate (14.0 vs 0.8 TH/s)
- StealthMiner 99% better power draw (1,320.0 vs 18.0 W)
- StealthMiner 76% better efficiency (94.3 vs 22.5 J/TH)
- StealthMiner 63% better noise (76.0 vs 28.0 dB)
- StealthMiner 64% better weight (4.2 vs 1.5 kg)
- Antminer S9i 7235% more heat output (4,503.8 vs 61.4 BTU/hr)
- Antminer S9i 19% more home mining score (83.0 vs 70.0)
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 S9i | Metric | StealthMiner |
|---|---|---|
| — | Upfront cost (MSRP) | $199 |
| -$2.66 | Daily net profit | -$0.01 |
| -$970 | Net after 1 year | -$204 |
| -$1,941 | Net after 2 years | -$209 |
| -$2,911 | Net after 3 years | -$214 |
| — | 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 S9iScore: 83/100. 76 dB noise level.
Best for Efficiency
StealthMiner22.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S9i or StealthMiner more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the StealthMiner is more profitable at $-0.01/day compared to $-2.66/day for the Antminer S9i. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer S9i or the StealthMiner better for noise-sensitive spaces?
The StealthMiner is quieter at 28 dB compared to the Antminer S9i at 76 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer S9i vs StealthMiner: which fits a residential setup better?
The Antminer S9i scores 83/100 on our Home Mining Score (vs 70/100 for the StealthMiner). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer S9i and StealthMiner on J/TH?
The Antminer S9i runs at 94.3 J/TH while the StealthMiner runs at 22.5 J/TH — a difference of 71.8 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 76% better efficiency (94.3 vs 22.5 J/TH).