MicroBT Whatsminer M21 vs Whatsminer M30S++ (Hydro)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | Whatsminer M30S++ (Hydro) |
|---|---|---|
| 31.0 TH/s | Hashrate | 112.0 TH/s |
| 1,860 W | Power Consumption | 3,472 W |
| 60.0 J/TH | Efficiency | 31.0 J/TH |
| — | Noise Level | 50 dB |
| 7,150.0 kg | Weight | 12.0 kg |
| 6,346 BTU/hr | BTU Output | 11,847 BTU/hr |
| 28/100 | Home Mining Score | 50/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21
Whatsminer M30S++ (Hydro)
Based on BTC price of $76,984 and current network difficulty as of May 18, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Whatsminer M30S++ (Hydro) edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). The standout gap is 261% more hashrate (31.0 vs 112.0 TH/s) in the Whatsminer M30S++ (Hydro)'s favour. The MicroBT Whatsminer M21 claws back ground on power consumption. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The MicroBT Whatsminer M21 and Whatsminer M30S++ (Hydro) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Whatsminer M30S++ (Hydro) 261% more hashrate (31.0 vs 112.0 TH/s)
- MicroBT Whatsminer M21 46% better power draw (1,860 vs 3,472 W)
- Whatsminer M30S++ (Hydro) 48% better efficiency (60.0 vs 31.0 J/TH)
- Whatsminer M30S++ (Hydro) 100% better weight (7,150.0 vs 12.0 kg)
- Whatsminer M30S++ (Hydro) 87% more heat output (6,346 vs 11,847 BTU/hr)
- Whatsminer M30S++ (Hydro) 79% more home mining score (28.0 vs 50.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| MicroBT Whatsminer M21 | Metric | Whatsminer M30S++ (Hydro) |
|---|---|---|
| — | Upfront cost (MSRP) | $3,000 |
| -$3.37 | Daily net profit | -$4.37 |
| -$1,229 | Net after 1 year | -$4,593 |
| -$2,457 | Net after 2 years | -$6,186 |
| -$3,686 | Net after 3 years | -$7,780 |
| — | 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 M21 or the Whatsminer M30S++ (Hydro)?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M21 is more profitable at $-3.37/day compared to $-4.37/day for the Whatsminer M30S++ (Hydro). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
MicroBT Whatsminer M21 vs Whatsminer M30S++ (Hydro): which runs at a lower noise level?
The Whatsminer M30S++ (Hydro) is quieter at 50 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 MicroBT Whatsminer M21 or Whatsminer M30S++ (Hydro)?
The Whatsminer M30S++ (Hydro) scores 50/100 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 MicroBT Whatsminer M21 and Whatsminer M30S++ (Hydro)?
The MicroBT Whatsminer M21 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).