Bitmain Antminer S9 (13Th) vs MicroBT Whatsminer M66
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9 (13Th) | Specification | MicroBT Whatsminer M66 |
|---|---|---|
| 13.0 TH/s | Hashrate | 238.0 TH/s |
| 1,300 W | Power Consumption | 4,736 W |
| 100.0 J/TH | Efficiency | 19.9 J/TH |
| — | Noise Level | — |
| 4,200.0 kg | Weight | 16.0 kg |
| 4,436 BTU/hr | BTU Output | 16,159 BTU/hr |
| 31/100 | Home Mining Score | 16/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S9 (13Th)
MicroBT Whatsminer M66
Based on BTC price of $79,082 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the MicroBT Whatsminer M66, which leads on 2 of 5 weighted factors (efficiency, hashrate). Its biggest concrete edge: 1731% more hashrate (13.0 vs 238.0 TH/s). The Bitmain Antminer S9 (13Th) holds the edge in power consumption and home mining score and price-performance. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitmain Antminer S9 (13Th) and MicroBT Whatsminer M66 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- MicroBT Whatsminer M66 1731% more hashrate (13.0 vs 238.0 TH/s)
- Bitmain Antminer S9 (13Th) 73% better power draw (1,300 vs 4,736 W)
- MicroBT Whatsminer M66 80% better efficiency (100.0 vs 19.9 J/TH)
- MicroBT Whatsminer M66 100% better weight (4,200.0 vs 16.0 kg)
- MicroBT Whatsminer M66 264% more heat output (4,436 vs 16,159 BTU/hr)
- Bitmain Antminer S9 (13Th) 94% more home mining score (31.0 vs 16.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Bitmain Antminer S9 (13Th) | Metric | MicroBT Whatsminer M66 |
|---|---|---|
| $65 | Upfront cost (MSRP) | $3,672 |
| -$2.65 | Daily net profit | -$2.71 |
| -$1,031 | Net after 1 year | -$4,659 |
| -$1,997 | Net after 2 years | -$5,647 |
| -$2,963 | Net after 3 years | -$6,634 |
| 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
Bitmain Antminer S9 (13Th)Score: 31/100. 0 dB noise level.
Best for Efficiency
MicroBT Whatsminer M6619.9 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S9 (13Th) or the MicroBT Whatsminer M66?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S9 (13Th) is more profitable at $-2.65/day compared to $-2.71/day for the MicroBT Whatsminer M66. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S9 (13Th) or the MicroBT Whatsminer M66 better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Bitmain Antminer S9 (13Th) vs MicroBT Whatsminer M66: which fits a residential setup better?
The Bitmain Antminer S9 (13Th) scores 31/100 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.
Bitmain Antminer S9 (13Th) vs MicroBT Whatsminer M66: how much does the efficiency gap matter?
The Bitmain Antminer S9 (13Th) runs at 100.0 J/TH while the MicroBT Whatsminer M66 runs at 19.9 J/TH — a difference of 80.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 80% better efficiency (100.0 vs 19.9 J/TH).