Bitdeer SealMiner A2 vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitdeer SealMiner A2 | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 226.0 TH/s | Hashrate | 31.0 TH/s |
| 3,730 W | Power Consumption | 1,860 W |
| 16.5 J/TH | Efficiency | 60.0 J/TH |
| 75 dB | Noise Level | — |
| 15.5 kg | Weight | 7,150.0 kg |
| 12,727 BTU/hr | BTU Output | 6,346 BTU/hr |
| 30/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitdeer | Manufacturer | MicroBT |
Profitability Comparison
Bitdeer SealMiner A2
MicroBT Whatsminer M21
Based on BTC price of $77,757 and current network difficulty as of Apr 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitdeer SealMiner A2 wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). The MicroBT Whatsminer M21 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
Bitdeer SealMiner A2Score: 30/100. 75 dB noise level.
Best for Efficiency
Bitdeer SealMiner A216.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitdeer SealMiner A2 or MicroBT Whatsminer M21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A2 is more profitable at $-0.80/day compared to $-3.35/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 Bitdeer SealMiner A2 or MicroBT Whatsminer M21?
The Bitdeer SealMiner A2 is quieter at 75 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 Bitdeer SealMiner A2 or MicroBT Whatsminer M21?
The Bitdeer SealMiner A2 scores 30/100 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 Bitdeer SealMiner A2 and MicroBT Whatsminer M21?
The Bitdeer SealMiner A2 runs at 16.5 J/TH while the MicroBT Whatsminer M21 runs at 60.0 J/TH — a difference of 43.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.
Compare Bitdeer SealMiner A2 with...
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A2 Hyd
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A2 Pro Air
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A2 Pro Hyd
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A3 Air
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A3 Hydro
- Bitdeer SealMiner A2 vs Bitdeer SealMiner A3 Pro Air