Bitmain Antminer S21 XP Hyd vs Bitmain Antminer S23
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP Hyd | Specification | Bitmain Antminer S23 |
|---|---|---|
| 473.0 TH/s | Hashrate | 318.0 TH/s |
| 5,676 W | Power Consumption | 3,498 W |
| 12.0 J/TH | Efficiency | 11.0 J/TH |
| 50 dB | Noise Level | 75 dB |
| 12.3 kg | Weight | 14.5 kg |
| 19,367 BTU/hr | BTU Output | 11,935 BTU/hr |
| 44/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21 XP Hyd
Bitmain Antminer S23
Based on BTC price of $78,230 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21 XP Hyd, which leads on 4 of 6 weighted factors (hashrate, home mining score, noise level, price-performance). Where it pulls away hardest is 33% better noise (50.0 vs 75.0 dB). The Bitmain Antminer S23 claws back ground on efficiency and 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 S21 XP Hyd and Bitmain Antminer S23 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 XP Hyd 49% more hashrate (473 vs 318 TH/s)
- Bitmain Antminer S23 38% better power draw (5,676 vs 3,498 W)
- Bitmain Antminer S23 8% better efficiency (12.0 vs 11.0 J/TH)
- Bitmain Antminer S21 XP Hyd 33% better noise (50.0 vs 75.0 dB)
- Bitmain Antminer S21 XP Hyd 15% better weight (12.3 vs 14.5 kg)
- Bitmain Antminer S21 XP Hyd 62% more heat output (19,367 vs 11,935 BTU/hr)
- Bitmain Antminer S21 XP Hyd 22% more home mining score (44.0 vs 36.0)
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 S21 XP Hyd | Metric | Bitmain Antminer S23 |
|---|---|---|
| $5,099 | Upfront cost (MSRP) | $4,999 |
| $3.41 | Daily net profit | $3.05 |
| -$3,856 | Net after 1 year | -$3,885 |
| -$2,613 | Net after 2 years | -$2,770 |
| -$1,370 | Net after 3 years | -$1,656 |
| Takes ~4.1 years to pay back at current rates | Payback period | Takes ~4.5 years to pay back at current rates |
At the default rate, the Bitmain Antminer S21 XP Hyd 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 S21 XP Hyd$0.35/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21 XP HydScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S2311.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S21 XP Hyd vs Bitmain Antminer S23: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP Hyd is more profitable at $3.41/day compared to $3.05/day for the Bitmain Antminer S23. 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 or Bitmain Antminer S23?
The Bitmain Antminer S21 XP Hyd is quieter at 50 dB compared to the Bitmain Antminer S23 at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21 XP Hyd or Bitmain Antminer S23?
The Bitmain Antminer S21 XP Hyd scores 44/100 on our Home Mining Score (vs 36/100 for the Bitmain Antminer S23). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer S21 XP Hyd and Bitmain Antminer S23 on J/TH?
The Bitmain Antminer S21 XP Hyd runs at 12.0 J/TH while the Bitmain Antminer S23 runs at 11.0 J/TH — a difference of 1.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 8% better efficiency (12.0 vs 11.0 J/TH).