Antminer S21 Pro vs Antminer S21 XP
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 Pro | Specification | Antminer S21 XP |
|---|---|---|
| 234.0 TH/s | Hashrate | 270.0 TH/s |
| 3,510 W | Power Consumption | 3,645 W |
| 15.0 J/TH | Efficiency | 13.5 J/TH |
| 75 dB | Noise Level | 75 dB |
| 15.0 kg | Weight | 15.4 kg |
| 11,976 BTU/hr | BTU Output | 12,437 BTU/hr |
| 30/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S21 Pro
Antminer S21 XP
Based on BTC price of $74,723 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
The S21 XP is Bitmain's flagship air-cooled miner, pushing the limits of what the 21-series platform can achieve. The S21 Pro sits just below it in the lineup.
The S21 XP offers the absolute best air-cooled efficiency in the S21 family, but its premium price means the ROI timeline is longer. The S21 Pro represents the sweet spot of performance versus cost for most operations.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Antminer S21 XP13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the S21 XP the most efficient air-cooled Bitcoin miner available?
Yes, the S21 XP is among the most efficient air-cooled SHA-256 miners on the market. Only hydro-cooled models (like the S21 Hyd) achieve better efficiency numbers.
Should I buy an S21 Pro or save up for an S21 XP?
If you have low electricity costs under $0.06/kWh, the S21 Pro's lower upfront cost may provide faster ROI. At higher rates, the S21 XP's efficiency advantage becomes worth the premium.