MicroBT Whatsminer M21 vs Whatsminer M50S+
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | Whatsminer M50S+ |
|---|---|---|
| 31.0 TH/s | Hashrate | 138.0 TH/s |
| 1,860 W | Power Consumption | 3,276 W |
| 60.0 J/TH | Efficiency | 23.7 J/TH |
| — | Noise Level | 75 dB |
| 7,150.0 kg | Weight | 13.0 kg |
| 6,346 BTU/hr | BTU Output | 11,178 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 M50S+
Based on BTC price of $79,066 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Whatsminer M50S+ edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 345% more hashrate (31.0 vs 138.0 TH/s). That said, the MicroBT Whatsminer M21 isn't beaten everywhere — it still wins power consumption. Cross-check the spec deltas and ROI 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 M50S+ sit on each measurable spec:
- Whatsminer M50S+ 345% more hashrate (31.0 vs 138.0 TH/s)
- MicroBT Whatsminer M21 43% better power draw (1,860 vs 3,276 W)
- Whatsminer M50S+ 60% better efficiency (60.0 vs 23.7 J/TH)
- Whatsminer M50S+ 100% better weight (7,150.0 vs 13.0 kg)
- Whatsminer M50S+ 76% more heat output (6,346 vs 11,178 BTU/hr)
- Whatsminer M50S+ 29% more home mining score (28.0 vs 36.0)
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 M21 | Metric | Whatsminer M50S+ |
|---|---|---|
| — | Upfront cost (MSRP) | $3,500 |
| -$3.34 | Daily net profit | -$2.84 |
| -$1,218 | Net after 1 year | -$4,537 |
| -$2,435 | Net after 2 years | -$5,574 |
| -$3,653 | Net after 3 years | -$6,611 |
| — | 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 M50S+Score: 36/100. 75 dB noise level.
Best for Efficiency
Whatsminer M50S+23.7 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the MicroBT Whatsminer M21 or Whatsminer M50S+ more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Whatsminer M50S+ is more profitable at $-2.84/day compared to $-3.34/day for the MicroBT Whatsminer M21. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the MicroBT Whatsminer M21 or the Whatsminer M50S+ better for noise-sensitive spaces?
The Whatsminer M50S+ 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 M50S+?
The Whatsminer M50S+ 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.
What is the efficiency difference between MicroBT Whatsminer M21 and Whatsminer M50S+?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the Whatsminer M50S+ runs at 23.7 J/TH — a difference of 36.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 60% better efficiency (60.0 vs 23.7 J/TH).