Bitmain Antminer S21 XP+ Hyd (500Th)
Bitmain Antminer S21 XP+ Hyd (500Th) vs MicroBT Whatsminer M66
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP+ Hyd (500Th) | Specification | MicroBT Whatsminer M66 |
|---|---|---|
| 500.0 TH/s | Taux de hachage | 238.0 TH/s |
| 5,500 W | Consommation électrique | 4,736 W |
| 11.0 J/TH | Efficiency | 19.9 J/TH |
| 50 dB | Niveau de bruit | — |
| 13.8 kg | Weight | 16.0 kg |
| 18,766 BTU/hr | BTU Output | 16,159 BTU/hr |
| 44/100 | Home Mining Score | 16/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S21 XP+ Hyd (500Th)
MicroBT Whatsminer M66
Based on BTC price of $78,166 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 XP+ Hyd (500Th) edges it: 4 of 6 factors go its way (efficacité, hashrate, score de minage domestique, niveau sonore). The standout gap is 110% more hashrate (500 vs 238 TH/s) in the Bitmain Antminer S21 XP+ Hyd (500Th)'s favour. That said, the MicroBT Whatsminer M66 isn't beaten everywhere — it still wins consommation électrique and rapport qualité-prix. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S21 XP+ Hyd (500Th) and MicroBT Whatsminer M66 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 XP+ Hyd (500Th) 110% more hashrate (500 vs 238 TH/s)
- MicroBT Whatsminer M66 14% better power draw (5,500 vs 4,736 W)
- Bitmain Antminer S21 XP+ Hyd (500Th) 45% better efficacité (11.0 vs 19.9 J/TH)
- Bitmain Antminer S21 XP+ Hyd (500Th) 14% better weight (13.8 vs 16.0 kg)
- Bitmain Antminer S21 XP+ Hyd (500Th) 16% more heat output (18,766 vs 16,159 BTU/hr)
- Bitmain Antminer S21 XP+ Hyd (500Th) 175% more score de minage domestique (44.0 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 S21 XP+ Hyd (500Th) | Metric | MicroBT Whatsminer M66 |
|---|---|---|
| $9,125 | Upfront cost (MSRP) | $3,672 |
| $4.79 | Daily net profit | -$2.81 |
| -$7,378 | Net after 1 year | -$4,696 |
| -$5,631 | Net after 2 years | -$5,720 |
| -$3,885 | Net after 3 years | -$6,744 |
| Takes ~5.2 years to pay back at current rates | 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
Bitmain Antminer S21 XP+ Hyd (500Th)$7.59/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21 XP+ Hyd (500Th)Score: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21 XP+ Hyd (500Th)11.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 XP+ Hyd (500Th) or MicroBT Whatsminer M66 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP+ Hyd (500Th) is more profitable at $4.79/day compared to $-2.81/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 S21 XP+ Hyd (500Th) or the MicroBT Whatsminer M66 better for noise-sensitive spaces?
The Bitmain Antminer S21 XP+ Hyd (500Th) is quieter at 50 dB compared to the MicroBT Whatsminer M66 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S21 XP+ Hyd (500Th) vs MicroBT Whatsminer M66: which fits a residential setup better?
The Bitmain Antminer S21 XP+ Hyd (500Th) scores 44/100 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 S21 XP+ Hyd (500Th) vs MicroBT Whatsminer M66: how much does the efficiency gap matter?
The Bitmain Antminer S21 XP+ Hyd (500Th) runs at 11.0 J/TH while the MicroBT Whatsminer M66 runs at 19.9 J/TH — a difference of 8.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 45% better efficacité (11.0 vs 19.9 J/TH).
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