Antminer S9 vs Antminer S9i
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S9 | Specification | Antminer S9i |
|---|---|---|
| 14.0 TH/s | Hashrate | 14.0 TH/s |
| 1,350 W | Power Consumption | 1,320 W |
| 96.4 J/TH | Efficiency | 94.3 J/TH |
| 76 dB | Noise Level | 76 dB |
| 4.2 kg | Weight | 4.2 kg |
| 4,606 BTU/hr | BTU Output | 4,504 BTU/hr |
| 83/100 | Home Mining Score | 83/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S9
Antminer S9i
Based on BTC price of $74,723 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
Two variants of the most successful Bitcoin miner ever produced. The S9 and S9i share the same era but have subtle differences.
The S9i is a minor iteration on the S9 with marginally improved efficiency. For practical purposes they are nearly identical — buy whichever is cheaper or more readily available.
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
Antminer S9i94.3 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Are parts interchangeable between the S9 and S9i?
Most components are compatible, including fans, PSUs, and control boards. Hashboards may differ in chip revision but are often swappable.
Are both still worth running in 2026?
For pure mining profitability, only at very cheap electricity. Both are popular for space heater conversion where the heat output becomes the primary value.