MicroBT Whatsminer M21S vs MicroBT WhatsMiner M76S+
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21S | Specification | MicroBT WhatsMiner M76S+ |
|---|---|---|
| 56.0 TH/s | Hashrate | 416.0 TH/s |
| 3,360 W | Power Consumption | 5,200 W |
| 60.0 J/TH | Efficiency | 12.5 J/TH |
| — | Noise Level | 75 dB |
| 12,500.0 kg | Weight | 18.0 kg |
| 11,464 BTU/hr | BTU Output | 17,742 BTU/hr |
| 22/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21S
MicroBT WhatsMiner M76S+
Based on BTC price of $79,227 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT WhatsMiner M76S+ wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 643% more hashrate (56.0 vs 416.0 TH/s). That said, the MicroBT Whatsminer M21S isn't beaten everywhere — it still wins power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Here is every spec where the MicroBT Whatsminer M21S and MicroBT WhatsMiner M76S+ actually differ, with the gap quantified:
- MicroBT WhatsMiner M76S+ 643% more hashrate (56.0 vs 416.0 TH/s)
- MicroBT Whatsminer M21S 35% better power draw (3,360 vs 5,200 W)
- MicroBT WhatsMiner M76S+ 79% better efficiency (60.0 vs 12.5 J/TH)
- MicroBT WhatsMiner M76S+ 100% better weight (12,500.0 vs 18.0 kg)
- MicroBT WhatsMiner M76S+ 55% more heat output (11,464 vs 17,742 BTU/hr)
- MicroBT WhatsMiner M76S+ 36% more home mining score (22.0 vs 30.0)
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 M21S | Metric | MicroBT WhatsMiner M76S+ |
|---|---|---|
| $650 | Upfront cost (MSRP) | — |
| -$5.96 | Daily net profit | $3.16 |
| -$2,825 | Net after 1 year | +$1,154 |
| -$5,000 | Net after 2 years | +$2,307 |
| -$7,175 | Net after 3 years | +$3,461 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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
MicroBT WhatsMiner M76S+$9.12/day higher profit at current rates.
Best for Home Mining
MicroBT WhatsMiner M76S+Score: 30/100. 75 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M76S+12.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
MicroBT Whatsminer M21S vs MicroBT WhatsMiner M76S+: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M76S+ is more profitable at $3.16/day compared to $-5.96/day for the MicroBT Whatsminer M21S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the MicroBT Whatsminer M21S or the MicroBT WhatsMiner M76S+ better for noise-sensitive spaces?
The MicroBT WhatsMiner M76S+ is quieter at 75 dB compared to the MicroBT Whatsminer M21S 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 M21S or the MicroBT WhatsMiner M76S+?
The MicroBT WhatsMiner M76S+ scores 30/100 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 MicroBT WhatsMiner M76S+?
The MicroBT Whatsminer M21S runs at 60.0 J/TH while the MicroBT WhatsMiner M76S+ runs at 12.5 J/TH — a difference of 47.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 79% better efficiency (60.0 vs 12.5 J/TH).