Antminer S9 vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S9 | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 14.0 TH/s | Hashrate | 56.0 TH/s |
| 1,350 W | Power Consumption | 3,360 W |
| 96.4 J/TH | Efficiency | 60.0 J/TH |
| 76 dB | Noise Level | — |
| 4.2 kg | Weight | 12,500.0 kg |
| 4,606 BTU/hr | BTU Output | 11,464 BTU/hr |
| 83/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S9
MicroBT Whatsminer M21S
Based on BTC price of $77,422 and current network difficulty as of Apr 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT Whatsminer M21S wins on 2 of 5 factors (efficiency, hashrate). The Antminer 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
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S9Score: 83/100. 76 dB noise level.
Best for Efficiency
MicroBT Whatsminer M21S60.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S9 or MicroBT Whatsminer M21S more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S9 is more profitable at $-2.74/day compared to $-6.05/day for the MicroBT Whatsminer M21S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S9 or MicroBT Whatsminer M21S?
The Antminer S9 is quieter at 76 dB compared to the MicroBT Whatsminer M21S at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S9 or MicroBT Whatsminer M21S?
The Antminer S9 scores 83/100 on our Home Mining Score (vs 22/100 for the MicroBT Whatsminer M21S). 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 S9 and MicroBT Whatsminer M21S?
The Antminer S9 runs at 96.4 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 36.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.