MicroBT Whatsminer M21S vs Whatsminer M30S++ (Hydro)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21S | Specification | Whatsminer M30S++ (Hydro) |
|---|---|---|
| 56.0 TH/s | Hashrate | 112.0 TH/s |
| 3,360 W | Power Consumption | 3,472 W |
| 60.0 J/TH | Efficiency | 31.0 J/TH |
| — | Noise Level | 50 dB |
| 12,500.0 kg | Weight | 12.0 kg |
| 11,464 BTU/hr | BTU Output | 11,847 BTU/hr |
| 22/100 | Home Mining Score | 50/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21S
Whatsminer M30S++ (Hydro)
Based on BTC price of $76,882 and current network difficulty as of May 18, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Whatsminer M30S++ (Hydro) wins on 4 of 6 factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 100% more hashrate (56.0 vs 112.0 TH/s). That said, the MicroBT Whatsminer M21S isn't beaten everywhere — it still wins power consumption and price-performance. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the MicroBT Whatsminer M21S and Whatsminer M30S++ (Hydro) actually differ, with the gap quantified:
- Whatsminer M30S++ (Hydro) 100% more hashrate (56.0 vs 112.0 TH/s)
- MicroBT Whatsminer M21S 3% better power draw (3,360 vs 3,472 W)
- Whatsminer M30S++ (Hydro) 48% better efficiency (60.0 vs 31.0 J/TH)
- Whatsminer M30S++ (Hydro) 100% better weight (12,500.0 vs 12.0 kg)
- Whatsminer M30S++ (Hydro) 3% more heat output (11,464 vs 11,847 BTU/hr)
- Whatsminer M30S++ (Hydro) 127% more home mining score (22.0 vs 50.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| MicroBT Whatsminer M21S | Metric | Whatsminer M30S++ (Hydro) |
|---|---|---|
| $650 | Upfront cost (MSRP) | $3,000 |
| -$6.08 | Daily net profit | -$4.37 |
| -$2,870 | Net after 1 year | -$4,595 |
| -$5,090 | Net after 2 years | -$6,190 |
| -$7,311 | Net after 3 years | -$7,785 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Whatsminer M30S++ (Hydro)Score: 50/100. 50 dB noise level.
Best for Efficiency
Whatsminer M30S++ (Hydro)31.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the MicroBT Whatsminer M21S or the Whatsminer M30S++ (Hydro)?
At the current BTC price and a $0.10/kWh electricity rate, the Whatsminer M30S++ (Hydro) is more profitable at $-4.37/day compared to $-6.08/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 MicroBT Whatsminer M21S or Whatsminer M30S++ (Hydro)?
The Whatsminer M30S++ (Hydro) is quieter at 50 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 MicroBT Whatsminer M21S or Whatsminer M30S++ (Hydro)?
The Whatsminer M30S++ (Hydro) scores 50/100 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 MicroBT Whatsminer M21S and Whatsminer M30S++ (Hydro)?
The MicroBT Whatsminer M21S runs at 60.0 J/TH while the Whatsminer M30S++ (Hydro) runs at 31.0 J/TH — a difference of 29.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 48% better efficiency (60.0 vs 31.0 J/TH).