MicroBT Whatsminer M21S vs MicroBT WhatsMiner M79
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21S | Specification | MicroBT WhatsMiner M79 |
|---|---|---|
| 56.0 TH/s | Hashrate | 920.0 TH/s |
| 3,360 W | Power Consumption | 13,340 W |
| 60.0 J/TH | Efficiency | 14.5 J/TH |
| — | Noise Level | 50 dB |
| 12,500.0 kg | Weight | 37.0 kg |
| 11,464 BTU/hr | BTU Output | 45,516 BTU/hr |
| 22/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21S
MicroBT WhatsMiner M79
Based on BTC price of $79,183 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT WhatsMiner M79 wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). Its biggest concrete edge: 1543% more hashrate (56.0 vs 920.0 TH/s). The MicroBT Whatsminer M21S 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
Here is every spec where the MicroBT Whatsminer M21S and MicroBT WhatsMiner M79 actually differ, with the gap quantified:
- MicroBT WhatsMiner M79 1543% more hashrate (56.0 vs 920.0 TH/s)
- MicroBT Whatsminer M21S 75% better power draw (3,360 vs 13,340 W)
- MicroBT WhatsMiner M79 76% better efficiency (60.0 vs 14.5 J/TH)
- MicroBT WhatsMiner M79 100% better weight (12,500.0 vs 37.0 kg)
- MicroBT WhatsMiner M79 297% more heat output (11,464 vs 45,516 BTU/hr)
- MicroBT WhatsMiner M79 100% more home mining score (22.0 vs 44.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| MicroBT Whatsminer M21S | Metric | MicroBT WhatsMiner M79 |
|---|---|---|
| $650 | Upfront cost (MSRP) | — |
| -$5.96 | Daily net profit | $2.55 |
| -$2,825 | Net after 1 year | +$932 |
| -$5,001 | Net after 2 years | +$1,864 |
| -$7,176 | Net after 3 years | +$2,797 |
| 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 M79$8.51/day higher profit at current rates.
Best for Home Mining
MicroBT WhatsMiner M79Score: 44/100. 50 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M7914.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the MicroBT Whatsminer M21S or MicroBT WhatsMiner M79 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M79 is more profitable at $2.55/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.
MicroBT Whatsminer M21S vs MicroBT WhatsMiner M79: which runs at a lower noise level?
The MicroBT WhatsMiner M79 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.
MicroBT Whatsminer M21S vs MicroBT WhatsMiner M79: which fits a residential setup better?
The MicroBT WhatsMiner M79 scores 44/100 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.
MicroBT Whatsminer M21S vs MicroBT WhatsMiner M79: how much does the efficiency gap matter?
The MicroBT Whatsminer M21S runs at 60.0 J/TH while the MicroBT WhatsMiner M79 runs at 14.5 J/TH — a difference of 45.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 76% better efficiency (60.0 vs 14.5 J/TH).