Antminer S19 vs MicroBT Whatsminer M66
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S19 | Specification | MicroBT Whatsminer M66 |
|---|---|---|
| 95.0 TH/s | Hashrate | 238.0 TH/s |
| 3,250 W | Power Consumption | 4,736 W |
| 34.2 J/TH | Efficiency | 19.9 J/TH |
| 75 dB | Noise Level | — |
| 14.4 kg | Weight | 16.0 kg |
| 11,089 BTU/hr | BTU Output | 16,159 BTU/hr |
| 84/100 | Home Mining Score | 16/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S19
MicroBT Whatsminer M66
Based on BTC price of $79,143 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT Whatsminer M66 wins on 3 of 6 factors (efficiency, hashrate, price-performance). Where it pulls away hardest is 151% more hashrate (95.0 vs 238.0 TH/s). That said, the Antminer S19 isn't beaten everywhere — it still wins power consumption and home mining score and noise level. 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 Antminer S19 and MicroBT Whatsminer M66 actually differ, with the gap quantified:
- MicroBT Whatsminer M66 151% more hashrate (95.0 vs 238.0 TH/s)
- Antminer S19 31% better power draw (3,250 vs 4,736 W)
- MicroBT Whatsminer M66 42% better efficiency (34.2 vs 19.9 J/TH)
- Antminer S19 10% better weight (14.4 vs 16.0 kg)
- MicroBT Whatsminer M66 46% more heat output (11,089 vs 16,159 BTU/hr)
- Antminer S19 425% more home mining score (84.0 vs 16.0)
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.
| Antminer S19 | Metric | MicroBT Whatsminer M66 |
|---|---|---|
| $2,000 | Upfront cost (MSRP) | $3,672 |
| -$4.34 | Daily net profit | -$2.70 |
| -$3,584 | Net after 1 year | -$4,657 |
| -$5,168 | Net after 2 years | -$5,642 |
| -$6,752 | Net after 3 years | -$6,627 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
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
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S19Score: 84/100. 75 dB noise level.
Best for Efficiency
MicroBT Whatsminer M6619.9 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer S19 vs MicroBT Whatsminer M66: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT Whatsminer M66 is more profitable at $-2.70/day compared to $-4.34/day for the Antminer S19. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer S19 or the MicroBT Whatsminer M66 better for noise-sensitive spaces?
The Antminer S19 is quieter at 75 dB compared to the MicroBT Whatsminer M66 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S19 or MicroBT Whatsminer M66?
The Antminer S19 scores 84/100 on our Home Mining Score (vs 16/100 for the MicroBT Whatsminer M66). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer S19 vs MicroBT Whatsminer M66: how much does the efficiency gap matter?
The Antminer S19 runs at 34.2 J/TH while the MicroBT Whatsminer M66 runs at 19.9 J/TH — a difference of 14.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 42% better efficiency (34.2 vs 19.9 J/TH).