Antminer S21 Pro vs Antminer Slim Edition (S9)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 Pro | Specification | Antminer Slim Edition (S9) |
|---|---|---|
| 234.0 TH/s | Hashrate | 12.0 TH/s |
| 3,510 W | Power Consumption | 1,100 W |
| 15.0 J/TH | Efficiency | 91.7 J/TH |
| 75 dB | Noise Level | 65 dB |
| 15.0 kg | Weight | 3.5 kg |
| 11,976 BTU/hr | BTU Output | 3,753 BTU/hr |
| 30/100 | Home Mining Score | 52/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Antminer S21 Pro
Antminer Slim Edition (S9)
Based on BTC price of $78,005 and current network difficulty as of Apr 26, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S21 Pro wins on 3 of 6 factors (efficiency, hashrate, price-performance). The Antminer Slim Edition (S9) holds the edge in power consumption and home mining score and noise level. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
Antminer S21 Pro$2.24/day higher profit at current rates.
Best for Home Mining
Antminer Slim Edition (S9)Score: 52/100. 65 dB noise level.
Best for Efficiency
Antminer S21 Pro15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21 Pro or Antminer Slim Edition (S9) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Pro is more profitable at $0.04/day compared to $-2.21/day for the Antminer Slim Edition (S9). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21 Pro or Antminer Slim Edition (S9)?
The Antminer Slim Edition (S9) is quieter at 65 dB compared to the Antminer S21 Pro at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S21 Pro or Antminer Slim Edition (S9)?
The Antminer Slim Edition (S9) scores 52/100 on our Home Mining Score (vs 30/100 for the Antminer S21 Pro). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Antminer S21 Pro and Antminer Slim Edition (S9)?
The Antminer S21 Pro runs at 15.0 J/TH while the Antminer Slim Edition (S9) runs at 91.7 J/TH — a difference of 76.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.