Bitmain Antminer S21 (200Th) vs MicroBT WhatsMiner M79
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 (200Th) | Specification | MicroBT WhatsMiner M79 |
|---|---|---|
| 200.0 TH/s | Hashrate | 920.0 TH/s |
| 3,550 W | Power Consumption | 13,340 W |
| 17.8 J/TH | Efficiency | 14.5 J/TH |
| — | Noise Level | 50 dB |
| 14.2 kg | Weight | 37.0 kg |
| 12,113 BTU/hr | BTU Output | 45,516 BTU/hr |
| 16/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S21 (200Th)
MicroBT WhatsMiner M79
Based on BTC price of $79,091 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the MicroBT WhatsMiner M79 comes out ahead — it takes 4 of 5 (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 360% more hashrate (200 vs 920 TH/s). The Bitmain Antminer S21 (200Th) holds the edge in 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 Bitmain Antminer S21 (200Th) and MicroBT WhatsMiner M79 actually differ, with the gap quantified:
- MicroBT WhatsMiner M79 360% more hashrate (200 vs 920 TH/s)
- Bitmain Antminer S21 (200Th) 73% better power draw (3,550 vs 13,340 W)
- MicroBT WhatsMiner M79 18% better efficiency (17.8 vs 14.5 J/TH)
- Bitmain Antminer S21 (200Th) 62% better weight (14.2 vs 37.0 kg)
- MicroBT WhatsMiner M79 276% more heat output (12,113 vs 45,516 BTU/hr)
- MicroBT WhatsMiner M79 175% more home mining score (16.0 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.
| Bitmain Antminer S21 (200Th) | Metric | MicroBT WhatsMiner M79 |
|---|---|---|
| $1,076 | Upfront cost (MSRP) | — |
| -$1.24 | Daily net profit | $1.47 |
| -$1,529 | Net after 1 year | +$536 |
| -$1,982 | Net after 2 years | +$1,072 |
| -$2,434 | Net after 3 years | +$1,608 |
| 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$2.71/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
Bitmain Antminer S21 (200Th) vs MicroBT WhatsMiner M79: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M79 is more profitable at $1.47/day compared to $-1.24/day for the Bitmain Antminer S21 (200Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21 (200Th) or MicroBT WhatsMiner M79?
The MicroBT WhatsMiner M79 is quieter at 50 dB compared to the Bitmain Antminer S21 (200Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S21 (200Th) vs MicroBT WhatsMiner M79: which fits a residential setup better?
The MicroBT WhatsMiner M79 scores 44/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 (200Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21 (200Th) vs MicroBT WhatsMiner M79: how much does the efficiency gap matter?
The Bitmain Antminer S21 (200Th) runs at 17.8 J/TH while the MicroBT WhatsMiner M79 runs at 14.5 J/TH — a difference of 3.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 18% better efficiency (17.8 vs 14.5 J/TH).