Antminer S21 Hydro (335TH/s) vs Antminer A3 (815GH/s)
Compare pricing, hashrate, power draw, efficiency, ROI, and estimated hosted profitability before choosing your next mining setup.
Option 1
Antminer S21 Hydro (335TH/s)
Option 2
Antminer A3 (815GH/s)
Antminer A3 (815GH/s) leads this comparison
Antminer A3 (815GH/s) comes out ahead on more buyer-facing signals here. Antminer S21 Hydro (335TH/s) can still be the better fit when budget, availability, or a specific mining setup matters more.
Profit estimates use currently available product data and a hosted electricity rate of $0.060/kWh.
Technical comparison
Side-by-side mining, operating, and commercial specs.
| Feature | Antminer S21 Hydro (335TH/s) | Antminer A3 (815GH/s) | Advantage |
|---|---|---|---|
| Brand | Antminer | Antminer | Contextual |
| Model | S21 | A3 | Contextual |
| Hashrate | 335 TH/s Best | 815 GH/s | Antminer S21 Hydro (335TH/s) |
| Power Consumption | 5360W | 1275W Best | Antminer A3 (815GH/s) |
| Efficiency | 16.00 J/TH | 1.56 J/GH Best | Antminer A3 (815GH/s) |
| Daily energy use | 128.6 kWh | 30.6 kWh Best | Antminer A3 (815GH/s) |
| Net Daily Profit (Est.) | $1.94 Best | -$1.68 | Antminer S21 Hydro (335TH/s) |
| Monthly Profit (Est.) | $58.25 Best | -$50.28 | Antminer S21 Hydro (335TH/s) |
| Price | N/A | N/A | Contextual |
| Estimated ROI | N/A | N/A | Contextual |
| Cooling | HYDRO | AIR | Contextual |
| Dimensions | 410 x 209 x 170 mm | 125 x 321 x 208 mm | Contextual |
| Weight | 17000 g | 4200 g Best | Antminer A3 (815GH/s) |
Performance
Antminer S21 Hydro (335TH/s) has the hashrate edge for raw output potential.
Efficiency
Antminer A3 (815GH/s) is stronger when comparing joules per hash unit.
Buying decision
Check live stock, delivery schedule, and hosting capacity on the product page before placing an order.
Frequently asked questions
Which is more powerful: Antminer S21 Hydro (335TH/s) or Antminer A3 (815GH/s)?
Antminer S21 Hydro (335TH/s) has a higher hashrate of 335 TH/s compared to Antminer A3 (815GH/s)'s 815 GH/s.
Is Antminer S21 Hydro (335TH/s) more efficient than Antminer A3 (815GH/s)?
Antminer A3 (815GH/s) is more energy efficient at 1.56 J/GH.
Which miner has the better estimated ROI?
Estimated ROI is not available because one of the miners is missing current pricing or profit data.
Every Day You Wait is Revenue You Lose
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