Antminer S9j vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S9j | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 14.5 TH/s | Taux de hachage | 31.0 TH/s |
| 1,350 W | Consommation électrique | 1,860 W |
| 93.1 J/TH | Efficiency | 60.0 J/TH |
| 76 dB | Niveau de bruit | — |
| 4.2 kg | Weight | 7,150.0 kg |
| 4,606 BTU/hr | BTU Output | 6,346 BTU/hr |
| 83/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S9j
MicroBT Whatsminer M21
Based on BTC price of $78,526 and current network difficulty as of Apr 26, 2026. Actual results vary.
Verdict
Selon notre analyse multifactorielle, le MicroBT Whatsminer M21 l'emporte sur 2 des 5 facteurs (efficacité, hashrate). Le Antminer S9j a l'avantage en consommation électrique and score de minage domestique and niveau sonore. Consultez les spécifications détaillées et les calculs de rentabilité ci-dessus pour déterminer quel mineur convient le mieux à votre installation.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S9jScore: 83/100. 76 dB noise level.
Best for Efficiency
MicroBT Whatsminer M2160.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S9j or MicroBT Whatsminer M21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S9j is more profitable at $-2.71/day compared to $-3.34/day for the MicroBT Whatsminer M21. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S9j or MicroBT Whatsminer M21?
The Antminer S9j is quieter at 76 dB compared to the MicroBT Whatsminer M21 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S9j or MicroBT Whatsminer M21?
The Antminer S9j scores 83/100 on our Home Mining Score (vs 28/100 for the MicroBT Whatsminer M21). 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 S9j and MicroBT Whatsminer M21?
The Antminer S9j runs at 93.1 J/TH while the MicroBT Whatsminer M21 runs at 60.0 J/TH — a difference of 33.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.