MicroBT Whatsminer M21S vs MicroBT WhatsMiner M79S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21S | Specification | MicroBT WhatsMiner M79S |
|---|---|---|
| 56.0 TH/s | Hashrate | 980.0 TH/s |
| 3,360 W | Power Consumption | 13,230 W |
| 60.0 J/TH | Efficiency | 13.5 J/TH |
| — | Noise Level | 50 dB |
| 12,500.0 kg | Weight | 37.0 kg |
| 11,464 BTU/hr | BTU Output | 45,141 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 M79S
Based on BTC price of $79,106 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the MicroBT WhatsMiner M79S edges it: 4 of 5 factors go its way (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 1650% more hashrate (56.0 vs 980.0 TH/s). That said, the MicroBT Whatsminer M21S isn't beaten everywhere — it still wins power consumption. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the MicroBT Whatsminer M21S and MicroBT WhatsMiner M79S sit on each measurable spec:
- MicroBT WhatsMiner M79S 1650% more hashrate (56.0 vs 980.0 TH/s)
- MicroBT Whatsminer M21S 75% better power draw (3,360 vs 13,230 W)
- MicroBT WhatsMiner M79S 78% better efficiency (60.0 vs 13.5 J/TH)
- MicroBT WhatsMiner M79S 100% better weight (12,500.0 vs 37.0 kg)
- MicroBT WhatsMiner M79S 294% more heat output (11,464 vs 45,141 BTU/hr)
- MicroBT WhatsMiner M79S 100% more home mining score (22.0 vs 44.0)
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 M21S | Metric | MicroBT WhatsMiner M79S |
|---|---|---|
| $650 | Upfront cost (MSRP) | — |
| -$5.96 | Daily net profit | $5.04 |
| -$2,826 | Net after 1 year | +$1,838 |
| -$5,002 | Net after 2 years | +$3,677 |
| -$7,178 | Net after 3 years | +$5,515 |
| 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 M79S$11.00/day higher profit at current rates.
Best for Home Mining
MicroBT WhatsMiner M79SScore: 44/100. 50 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M79S13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the MicroBT Whatsminer M21S or the MicroBT WhatsMiner M79S?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M79S is more profitable at $5.04/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 M79S: which runs at a lower noise level?
The MicroBT WhatsMiner M79S 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.
For mining at home, should I pick the MicroBT Whatsminer M21S or the MicroBT WhatsMiner M79S?
The MicroBT WhatsMiner M79S 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.
What is the efficiency difference between MicroBT Whatsminer M21S and MicroBT WhatsMiner M79S?
The MicroBT Whatsminer M21S runs at 60.0 J/TH while the MicroBT WhatsMiner M79S runs at 13.5 J/TH — a difference of 46.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 78% better efficiency (60.0 vs 13.5 J/TH).