Antminer S21 Pro Hydro Review and Specs 2026
Bitmain · Released 2024-03 · Hydro-cooled Bitcoin ASIC
Full Specifications
| Manufacturer | Bitmain |
| Model | Antminer S21 Pro Hydro |
| Algorithm | SHA-256 |
| Cooling Type | Hydro Cooling |
| Hashrate | 335 TH/s |
| Power Consumption | 5,360 W |
| Efficiency | 16.0 J/TH |
| Noise Level | 45 dB |
| Dimensions | 400×195×290 mm |
| Weight | 17.5 kg |
| Est. Market Price | $5,500 |
| Release Date | 2024-03 |
| Spec Confidence | ✓ Verified |
Where to Buy Antminer S21 Pro Hydro
Compare prices across trusted ASIC marketplaces. Prices vary — check each source for current availability.
Large used ASIC inventory. Good for budget buyers.
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ROI Analysis
Based on current network difficulty. Assumes Abundant Mines hosting at $225/month flat fee.
Pros & Cons
Pros
- +335 TH/s class-leading air+hydro hashrate
- +Near-silent at 45 dB
- +Extended hardware lifespan with liquid cooling
- +Ideal for high-density rack deployments
Cons
- −Requires dedicated hydro cooling infrastructure
- −Higher upfront hardware cost
- −Limited hosting provider compatibility vs air cooling
- −More complex setup and maintenance
Best For / Worst For
Large-scale operations with existing hydro cooling infrastructure
Operations without water cooling setup — infrastructure cost is high
Frequently Asked Questions
Is the Antminer S21 Pro Hydro profitable in 2026?
Profitability depends on live BTC price and network difficulty. At $100,000 BTC the Antminer S21 Pro Hydro generates approximately 18.51 USD per day gross revenue at 335 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 Pro Hydro earn per day?
The Antminer S21 Pro Hydro mines approximately 0.00018513 BTC per day at current network difficulty (~113.7 EH). At $100,000 per BTC that's roughly $19 gross per day before electricity and hosting costs. Check the live calculator above for current BTC price.
What hosting providers support the Antminer S21 Pro Hydro?
The Antminer S21 Pro Hydro uses Hydro Cooling. Compatible hosting providers include Simple Mining. Abundant Mines is recommended for air-cooled miners at a flat $225/month all-in rate.
What is the efficiency of the Antminer S21 Pro Hydro?
The Antminer S21 Pro Hydro achieves 16 J/TH (joules per terahash), meaning it uses 16 joules of energy for every terahash of mining power. This is excellent efficiency — among the best available.
Running the numbers on Antminer S21 Pro Hydro?
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