Bitaxe Ultra vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitaxe Ultra | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 500.0 GH/s | Hashrate | 56.0 TH/s |
| 15 W | Power Consumption | 3,360 W |
| 30.0 J/TH | Efficiency | 60.0 J/TH |
| 35 dB | Noise Level | — |
| 0.3 kg | Weight | 12,500.0 kg |
| 51 BTU/hr | BTU Output | 11,464 BTU/hr |
| 70/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| D-Central | Manufacturer | MicroBT |
Profitability Comparison
Bitaxe Ultra
MicroBT Whatsminer M21S
Based on BTC price of $77,562 and current network difficulty as of Apr 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitaxe Ultra wins on 4 of 6 factors (efficiency, power consumption, home mining score, noise level). The MicroBT Whatsminer M21S 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
Bitaxe UltraScore: 70/100. 35 dB noise level.
Best for Efficiency
Bitaxe Ultra30.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitaxe Ultra or MicroBT Whatsminer M21S more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitaxe Ultra is more profitable at $-0.02/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 Bitaxe Ultra or MicroBT Whatsminer M21S?
The Bitaxe Ultra is quieter at 35 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 Bitaxe Ultra or MicroBT Whatsminer M21S?
The Bitaxe Ultra scores 70/100 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 Bitaxe Ultra and MicroBT Whatsminer M21S?
The Bitaxe Ultra runs at 30.0 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 30.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.