Bitmain Antminer S21+ Hyd vs Antminer S21 XP
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer S21 XP is the stronger pick — Similar performance tier without requiring liquid cooling infrastructure — practical for far more mining setups. The Bitmain Antminer S21+ Hyd runs 319.0 TH/s at 15.0 J/TH; the Antminer S21 XP runs 270.0 TH/s at 13.5 J/TH.
Specs verified against the D-Central Mining Bible \xc2\xb7 July 2026
Specifications Comparison
| Bitmain Antminer S21+ Hyd | Specification | Antminer S21 XP |
|---|---|---|
| 319.0 TH/s | Taux de hachage | 270.0 TH/s |
| 4,785 W | Consommation électrique | 3,645 W |
| 15.0 J/TH | Efficiency | 13.5 J/TH |
| 50 dB | Niveau de bruit | 75 dB |
| 17.5 kg | Weight | 15.4 kg |
| 16,326 BTU/hr | BTU Output | 12,437 BTU/hr |
| 32/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S21+ Hyd
Antminer S21 XP
Based on BTC price of $62,464 and current network difficulty as of Jul 14, 2026. Actual results vary.
Verdict
The S21+ Hyd uses liquid cooling to pack more hashrate into a single unit, while the S21 XP represents the pinnacle of air-cooled efficiency. This comparison highlights the trade-offs between cooling methods.
Contrary to expectation, the air-cooled S21 XP is the more efficient machine, at roughly 13.5 J/TH versus about 15 J/TH for the S21+ Hyd. What the Hyd offers is higher hashrate per unit and heat capture into a water loop, but it requires plumbing infrastructure most home miners cannot easily accommodate. The S21 XP delivers better efficiency 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 efficacité (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 300% more score de minage domestique (32.0 vs 8.0)
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 |
| -$1.63 | Daily net profit | -$0.41 |
| -$3,095 | Net after 1 year | -$8,350 |
| -$3,692 | Net after 2 years | -$8,500 |
| -$4,288 | Net after 3 years | -$8,650 |
| Does not pay back at current rates (negative daily profit) | 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
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitmain Antminer S21+ HydScore: 32/100. 50 dB noise level.
Best for Efficiency
Antminer S21 XP13.5 J/TH — lower electricity cost per unit of hashrate.
Foire aux 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.
Is the S21+ Hyd more efficient than the S21 XP?
No. The air-cooled S21 XP runs around 13.5 J/TH versus roughly 15 J/TH for the S21+ Hyd. The Hyd's advantages are higher hashrate per machine and the ability to capture heat in a water loop for reuse, not efficiency.