Antminer T21 vs MicroBT Whatsminer M66
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer T21 | Specification | MicroBT Whatsminer M66 |
|---|---|---|
| 190.0 TH/s | Hashrate | 238.0 TH/s |
| 3,610 W | Power Consumption | 4,736 W |
| 19.0 J/TH | Efficiency | 19.9 J/TH |
| 75 dB | Noise Level | — |
| 14.6 kg | Weight | 16.0 kg |
| 12,317 BTU/hr | BTU Output | 16,159 BTU/hr |
| 30/100 | Home Mining Score | 16/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer T21
MicroBT Whatsminer M66
Based on BTC price of $77,334 and current network difficulty as of Apr 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer T21 wins on 4 of 6 factors (efficiency, power consumption, home mining score, noise level). The MicroBT Whatsminer M66 holds the edge in hashrate and price-performance. 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 T21Score: 30/100. 75 dB noise level.
Best for Efficiency
Antminer T2119.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer T21 or MicroBT Whatsminer M66 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer T21 is more profitable at $-1.85/day compared to $-2.83/day for the MicroBT Whatsminer M66. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer T21 or MicroBT Whatsminer M66?
The Antminer T21 is quieter at 75 dB compared to the MicroBT Whatsminer M66 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer T21 or MicroBT Whatsminer M66?
The Antminer T21 scores 30/100 on our Home Mining Score (vs 16/100 for the MicroBT Whatsminer M66). 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 T21 and MicroBT Whatsminer M66?
The Antminer T21 runs at 19.0 J/TH while the MicroBT Whatsminer M66 runs at 19.9 J/TH — a difference of 0.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.