Antminer S21 XP Review and Specs 2026
Bitmain · Released 2024-07 · Air-cooled Bitcoin ASIC
Full Specifications
| Manufacturer | Bitmain |
| Model | Antminer S21 XP |
| Algorithm | SHA-256 |
| Cooling Type | Air Cooling |
| Hashrate | 270 TH/s |
| Power Consumption | 3,645 W |
| Efficiency | 13.5 J/TH |
| Noise Level | 75 dB |
| Dimensions | 400×195×290 mm |
| Weight | 14.5 kg |
| Est. Market Price | $5,200 |
| Release Date | 2024-07 |
| Spec Confidence | ✓ Verified |
Where to Buy Antminer S21 XP
Compare prices across trusted ASIC marketplaces. Prices vary — check each source for current availability.
Large used ASIC inventory. Good for budget buyers.
Shop now →Curated new and refurbished hardware with verified specs.
Shop now →Direct from manufacturer. Warranty included. Lead times vary.
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ROI Analysis
Based on current network difficulty. Assumes Abundant Mines hosting at $225/month flat fee.
Pros & Cons
Pros
- +13.5 J/TH — best efficiency of any air-cooled miner available
- +270 TH/s is highest air-cooled hashrate on the market
- +Superior post-2028 halving resilience
- +Full Bitmain warranty and support
Cons
- −Premium price (~$5,200) vs S21 Pro (~$3,800)
- −Requires 240V / 16A dedicated circuit
- −75 dB noise requires industrial environment
- −Limited initial availability
Best For / Worst For
Large-scale hosted operations seeking the highest air-cooled efficiency available in 2024-2026
Budget-constrained operators — premium price over S21 Pro; not suitable for home use
Frequently Asked Questions
Is the Antminer S21 XP profitable in 2026?
Profitability depends on live BTC price and network difficulty. At $100,000 BTC the Antminer S21 XP generates approximately 14.92 USD per day gross revenue at 270 TH/s. With typical hosted electricity costs, net daily profit depends heavily on your hosting rate. Use our calculator above for your specific scenario.
How much does the Antminer S21 XP earn per day?
The Antminer S21 XP mines approximately 0.00014921 BTC per day at current network difficulty (~113.7 EH). At $100,000 per BTC that's roughly $15 gross per day before electricity and hosting costs. Check the live calculator above for current BTC price.
What hosting providers support the Antminer S21 XP?
The Antminer S21 XP uses Air Cooling. Compatible hosting providers include Abundant Mines, Simple Mining, EZ Blockchain. Abundant Mines is recommended for air-cooled miners at a flat $225/month all-in rate.
What is the efficiency of the Antminer S21 XP?
The Antminer S21 XP achieves 13.5 J/TH (joules per terahash), meaning it uses 13.5 joules of energy for every terahash of mining power. This is excellent efficiency — among the best available.
Running the numbers on Antminer S21 XP?
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Run the Numbers
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Providers that support Air Cooling
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