Bitmain Antminer S21+ Hyd vs Antminer S21 XP
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21+ Hyd | Specification | Antminer S21 XP |
|---|---|---|
| 319.0 TH/s | Hashrate | 270.0 TH/s |
| 4,785 W | Power Consumption | 3,645 W |
| 15.0 J/TH | Efficiency | 13.5 J/TH |
| 50 dB | Noise Level | 75 dB |
| 17.5 kg | Weight | 15.4 kg |
| 16,326 BTU/hr | BTU Output | 12,437 BTU/hr |
| 44/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21+ Hyd
Antminer S21 XP
Based on BTC price of $78,210 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
The S21 Hyd uses liquid cooling to achieve the best possible efficiency, while the S21 XP represents the pinnacle of air-cooled performance. This comparison highlights the trade-offs between cooling methods.
The S21 Hyd achieves better efficiency through liquid cooling but requires plumbing infrastructure that most home miners cannot easily accommodate. The S21 XP delivers near-equivalent performance with standard air cooling, making it far more practical for typical setups.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S21+ Hyd and Antminer S21 XP sit on each measurable spec:
- Bitmain Antminer S21+ Hyd 18% more hashrate (319 vs 270 TH/s)
- Antminer S21 XP 24% better power draw (4,785 vs 3,645 W)
- Antminer S21 XP 10% better efficiency (15.0 vs 13.5 J/TH)
- Bitmain Antminer S21+ Hyd 33% better noise (50.0 vs 75.0 dB)
- Antminer S21 XP 12% better weight (17.5 vs 15.4 kg)
- Bitmain Antminer S21+ Hyd 31% more heat output (16,326 vs 12,437 BTU/hr)
- Bitmain Antminer S21+ Hyd 47% more home mining score (44.0 vs 30.0)
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+ Hyd | Metric | Antminer S21 XP |
|---|---|---|
| $2,499 | Upfront cost (MSRP) | $8,200 |
| -$0.00 | Daily net profit | $0.97 |
| -$2,500 | Net after 1 year | -$7,846 |
| -$2,501 | Net after 2 years | -$7,492 |
| -$2,502 | Net after 3 years | -$7,138 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~23.2 years to pay back at current rates |
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
Antminer S21 XP$0.97/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21+ HydScore: 44/100. 50 dB noise level.
Best for Efficiency
Antminer S21 XP13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is liquid cooling worth the complexity for home mining?
For most home miners, no. Liquid cooling requires pumps, radiators, coolant, and plumbing knowledge. The S21 XP's air cooling delivers competitive efficiency without any of that infrastructure.
How much more efficient is the S21 Hyd compared to the S21 XP?
The Hyd variant typically achieves 2-3 J/TH better efficiency. Whether that gap justifies the cooling infrastructure investment depends on your scale and electricity rate.