Antminer S21 Hydro vs MicroBT WhatsMiner M79S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 Hydro | Specification | MicroBT WhatsMiner M79S |
|---|---|---|
| 335.0 TH/s | Hashrate | 980.0 TH/s |
| 5,360 W | Power Consumption | 13,230 W |
| 16.0 J/TH | Efficiency | 13.5 J/TH |
| 50 dB | Noise Level | 50 dB |
| 15.8 kg | Weight | 37.0 kg |
| 18,288 BTU/hr | BTU Output | 45,141 BTU/hr |
| 44/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S21 Hydro
MicroBT WhatsMiner M79S
Based on BTC price of $79,034 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT WhatsMiner M79S wins on 2 of 3 factors (efficiency, hashrate). Where it pulls away hardest is 193% more hashrate (335 vs 980 TH/s). The Antminer S21 Hydro holds the edge in power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Antminer S21 Hydro and MicroBT WhatsMiner M79S actually differ, with the gap quantified:
- MicroBT WhatsMiner M79S 193% more hashrate (335 vs 980 TH/s)
- Antminer S21 Hydro 59% better power draw (5,360 vs 13,230 W)
- MicroBT WhatsMiner M79S 16% better efficiency (16.0 vs 13.5 J/TH)
- Antminer S21 Hydro 57% better weight (15.8 vs 37.0 kg)
- MicroBT WhatsMiner M79S 147% more heat output (18,288 vs 45,141 BTU/hr)
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.
| Antminer S21 Hydro | Metric | MicroBT WhatsMiner M79S |
|---|---|---|
| $9,500 | Upfront cost (MSRP) | — |
| -$0.68 | Daily net profit | $3.89 |
| -$9,748 | Net after 1 year | +$1,420 |
| -$9,996 | Net after 2 years | +$2,840 |
| -$10,245 | Net after 3 years | +$4,260 |
| 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$4.57/day higher profit at current rates.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
MicroBT WhatsMiner M79S13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer S21 Hydro 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 $3.89/day compared to $-0.68/day for the Antminer S21 Hydro. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer S21 Hydro vs MicroBT WhatsMiner M79S: which runs at a lower noise level?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
For mining at home, should I pick the Antminer S21 Hydro or the MicroBT WhatsMiner M79S?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
How far apart are the Antminer S21 Hydro and MicroBT WhatsMiner M79S on J/TH?
The Antminer S21 Hydro runs at 16.0 J/TH while the MicroBT WhatsMiner M79S runs at 13.5 J/TH — a difference of 2.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 16% better efficiency (16.0 vs 13.5 J/TH).
Compare Antminer S21 Hydro with...
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