MicroBT Whatsminer M21 vs Whatsminer M30S+
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | Whatsminer M30S+ |
|---|---|---|
| 31.0 TH/s | Hashrate | 100.0 TH/s |
| 1,860 W | Power Consumption | 3,400 W |
| 60.0 J/TH | Efficiency | 34.0 J/TH |
| — | Noise Level | 75 dB |
| 7,150.0 kg | Weight | 11.5 kg |
| 6,346 BTU/hr | BTU Output | 11,601 BTU/hr |
| 28/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21
Whatsminer M30S+
Based on BTC price of $77,713 and current network difficulty as of May 21, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Whatsminer M30S+ wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 223% more hashrate (31.0 vs 100.0 TH/s). That said, the MicroBT Whatsminer M21 isn't beaten everywhere — it still wins power consumption. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the MicroBT Whatsminer M21 and Whatsminer M30S+ sit on each measurable spec:
- Whatsminer M30S+ 223% more hashrate (31.0 vs 100.0 TH/s)
- MicroBT Whatsminer M21 45% better power draw (1,860 vs 3,400 W)
- Whatsminer M30S+ 43% better efficiency (60.0 vs 34.0 J/TH)
- Whatsminer M30S+ 100% better weight (7,150.0 vs 11.5 kg)
- Whatsminer M30S+ 83% more heat output (6,346 vs 11,601 BTU/hr)
- Whatsminer M30S+ 29% more home mining score (28.0 vs 36.0)
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+ |
|---|---|---|
| — | Upfront cost (MSRP) | $1,800 |
| -$3.36 | Daily net profit | -$4.58 |
| -$1,225 | Net after 1 year | -$3,473 |
| -$2,449 | Net after 2 years | -$5,146 |
| -$3,674 | Net after 3 years | -$6,819 |
| — | 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+Score: 36/100. 75 dB noise level.
Best for Efficiency
Whatsminer M30S+34.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the MicroBT Whatsminer M21 or Whatsminer M30S+ more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M21 is more profitable at $-3.36/day compared to $-4.58/day for the Whatsminer M30S+. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the MicroBT Whatsminer M21 or Whatsminer M30S+?
The Whatsminer M30S+ 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.
For mining at home, should I pick the MicroBT Whatsminer M21 or the Whatsminer M30S+?
The Whatsminer M30S+ scores 36/100 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.
MicroBT Whatsminer M21 vs Whatsminer M30S+: how much does the efficiency gap matter?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the Whatsminer M30S+ runs at 34.0 J/TH — a difference of 26.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 43% better efficiency (60.0 vs 34.0 J/TH).