Bitmain Antminer S21 XP+ Hyd (500Th) vs Bitmain Antminer S23 Hyd 3U
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP+ Hyd (500Th) | Specification | Bitmain Antminer S23 Hyd 3U |
|---|---|---|
| 500.0 TH/s | Hashrate | 1.2 PH/s |
| 5,500 W | Power Consumption | 11,020 W |
| 11.0 J/TH | Efficiency | 9.5 J/TH |
| 50 dB | Noise Level | 50 dB |
| 13.8 kg | Weight | — |
| 18,766 BTU/hr | BTU Output | 37,600 BTU/hr |
| 44/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21 XP+ Hyd (500Th)
Bitmain Antminer S23 Hyd 3U
Based on BTC price of $79,137 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S23 Hyd 3U, which leads on 3 of 4 weighted factors (efficiency, hashrate, price-performance). Where it pulls away hardest is 132% more hashrate (500 vs 1,160 TH/s). The Bitmain Antminer S21 XP+ Hyd (500Th) 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 XP+ Hyd (500Th) and Bitmain Antminer S23 Hyd 3U actually differ, with the gap quantified:
- Bitmain Antminer S23 Hyd 3U 132% more hashrate (500 vs 1,160 TH/s)
- Bitmain Antminer S21 XP+ Hyd (500Th) 50% better power draw (5,500 vs 11,020 W)
- Bitmain Antminer S23 Hyd 3U 14% better efficiency (11.0 vs 9.5 J/TH)
- Bitmain Antminer S23 Hyd 3U 100% more heat output (18,766 vs 37,600 BTU/hr)
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 XP+ Hyd (500Th) | Metric | Bitmain Antminer S23 Hyd 3U |
|---|---|---|
| $9,125 | Upfront cost (MSRP) | $7,988 |
| $5.58 | Daily net profit | $17.11 |
| -$7,089 | Net after 1 year | -$1,741 |
| -$5,053 | Net after 2 years | +$4,506 |
| -$3,018 | Net after 3 years | +$10,753 |
| Takes ~4.5 years to pay back at current rates | Payback period | Pays for itself in ~15 months at current rates |
At the default rate, the Bitmain Antminer S23 Hyd 3U reaches break-even first — but plug in your own electricity cost above, since payback shifts sharply with it.
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 S23 Hyd 3U$11.54/day higher profit at current rates.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Bitmain Antminer S23 Hyd 3U9.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21 XP+ Hyd (500Th) or the Bitmain Antminer S23 Hyd 3U?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S23 Hyd 3U is more profitable at $17.11/day compared to $5.58/day for the Bitmain Antminer S21 XP+ Hyd (500Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21 XP+ Hyd (500Th) or Bitmain Antminer S23 Hyd 3U?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Bitmain Antminer S21 XP+ Hyd (500Th) vs Bitmain Antminer S23 Hyd 3U: which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
How far apart are the Bitmain Antminer S21 XP+ Hyd (500Th) and Bitmain Antminer S23 Hyd 3U on J/TH?
The Bitmain Antminer S21 XP+ Hyd (500Th) runs at 11.0 J/TH while the Bitmain Antminer S23 Hyd 3U runs at 9.5 J/TH — a difference of 1.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 14% better efficiency (11.0 vs 9.5 J/TH).
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