Bitmain Antminer T9 (12.5Th) vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer T9 (12.5Th) | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 12.5 TH/s | Hashrate | 31.0 TH/s |
| 1,576 W | Power Consumption | 1,860 W |
| 126.1 J/TH | Efficiency | 60.0 J/TH |
| — | Noise Level | — |
| 3,800.0 kg | Weight | 7,150.0 kg |
| 5,377 BTU/hr | BTU Output | 6,346 BTU/hr |
| 28/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer T9 (12.5Th)
MicroBT Whatsminer M21
Based on BTC price of $66,524 and current network difficulty as of Mar 27, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT Whatsminer M21 wins on 2 of 3 factors (efficiency, hashrate). The Bitmain Antminer T9 (12.5Th) holds the edge in power consumption. 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
TieBoth miners are equally suitable for home use.
Best for Efficiency
MicroBT Whatsminer M2160.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer T9 (12.5Th) or MicroBT Whatsminer M21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer T9 (12.5Th) is more profitable at $-3.42/day compared to $-3.57/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 Bitmain Antminer T9 (12.5Th) or MicroBT Whatsminer M21?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Bitmain Antminer T9 (12.5Th) or MicroBT Whatsminer M21?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
What is the efficiency difference between Bitmain Antminer T9 (12.5Th) and MicroBT Whatsminer M21?
The Bitmain Antminer T9 (12.5Th) runs at 126.1 J/TH while the MicroBT Whatsminer M21 runs at 60.0 J/TH — a difference of 66.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.