Bitmain Antminer S21e XP Hyd 3U vs Bitmain Antminer S9 Hydro (18Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21e XP Hyd 3U | Specification | Bitmain Antminer S9 Hydro (18Th) |
|---|---|---|
| 860.0 TH/s | Hashrate | 18.0 TH/s |
| 11,180 W | Power Consumption | 1,728 W |
| 13.0 J/TH | Efficiency | 96.0 J/TH |
| 50 dB | Noise Level | — |
| — | Weight | 5,150.0 kg |
| 38,146 BTU/hr | BTU Output | 5,896 BTU/hr |
| 44/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21e XP Hyd 3U
Bitmain Antminer S9 Hydro (18Th)
Based on BTC price of $79,086 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21e XP Hyd 3U, which leads on 4 of 5 weighted factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 4678% more hashrate (860.0 vs 18.0 TH/s). The Bitmain Antminer S9 Hydro (18Th) 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
The Bitmain Antminer S21e XP Hyd 3U and Bitmain Antminer S9 Hydro (18Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21e XP Hyd 3U 4678% more hashrate (860.0 vs 18.0 TH/s)
- Bitmain Antminer S9 Hydro (18Th) 85% better power draw (11,180 vs 1,728 W)
- Bitmain Antminer S21e XP Hyd 3U 86% better efficiency (13.0 vs 96.0 J/TH)
- Bitmain Antminer S21e XP Hyd 3U 547% more heat output (38,146 vs 5,896 BTU/hr)
- Bitmain Antminer S21e XP Hyd 3U 57% more home mining score (44.0 vs 28.0)
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 S21e XP Hyd 3U | Metric | Bitmain Antminer S9 Hydro (18Th) |
|---|---|---|
| $10,899 | Upfront cost (MSRP) | — |
| $4.47 | Daily net profit | -$3.49 |
| -$9,269 | Net after 1 year | -$1,275 |
| -$7,638 | Net after 2 years | -$2,549 |
| -$6,008 | Net after 3 years | -$3,824 |
| Takes ~6.7 years to pay back at current rates | 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
Bitmain Antminer S21e XP Hyd 3U$7.96/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21e XP Hyd 3UScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21e XP Hyd 3U13.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21e XP Hyd 3U or Bitmain Antminer S9 Hydro (18Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21e XP Hyd 3U is more profitable at $4.47/day compared to $-3.49/day for the Bitmain Antminer S9 Hydro (18Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21e XP Hyd 3U vs Bitmain Antminer S9 Hydro (18Th): which runs at a lower noise level?
The Bitmain Antminer S21e XP Hyd 3U is quieter at 50 dB compared to the Bitmain Antminer S9 Hydro (18Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21e XP Hyd 3U or Bitmain Antminer S9 Hydro (18Th)?
The Bitmain Antminer S21e XP Hyd 3U scores 44/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer S9 Hydro (18Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21e XP Hyd 3U vs Bitmain Antminer S9 Hydro (18Th): how much does the efficiency gap matter?
The Bitmain Antminer S21e XP Hyd 3U runs at 13.0 J/TH while the Bitmain Antminer S9 Hydro (18Th) runs at 96.0 J/TH — a difference of 83.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 86% better efficiency (13.0 vs 96.0 J/TH).