Antminer S21 (151TH/s) vs SealMiner A3 Pro Air (290TH/s)
Compare pricing, hashrate, power draw, efficiency, ROI, and estimated hosted profitability before choosing your next mining setup.
Option 1
Antminer S21 (151TH/s)
Option 2
SealMiner A3 Pro Air (290TH/s)
SealMiner A3 Pro Air (290TH/s) leads this comparison
SealMiner A3 Pro Air (290TH/s) comes out ahead on more buyer-facing signals here. Antminer S21 (151TH/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 (151TH/s) | SealMiner A3 Pro Air (290TH/s) | Advantage |
|---|---|---|---|
| Brand | Antminer | SealMiner | Contextual |
| Model | S21 | A3 | Contextual |
| Hashrate | 151 TH/s | 290 TH/s Best | SealMiner A3 Pro Air (290TH/s) |
| Power Consumption | 3550W Best | 3625W | Antminer S21 (151TH/s) |
| Efficiency | 23.51 J/TH | 12.50 J/TH Best | SealMiner A3 Pro Air (290TH/s) |
| Daily energy use | 85.2 kWh Best | 87.0 kWh | Antminer S21 (151TH/s) |
| Net Daily Profit (Est.) | $0.04 | $4.28 Best | SealMiner A3 Pro Air (290TH/s) |
| Monthly Profit (Est.) | $1.14 | $128.40 Best | SealMiner A3 Pro Air (290TH/s) |
| Price | $829.26 | N/A | Contextual |
| Estimated ROI | 717 mo | N/A | Contextual |
| Cooling | AIR | AIR | Contextual |
| Dimensions | 400 x 290 x 195 mm | 197 x 292 x 365 mm | Contextual |
| Weight | N/A | 17000 g | Contextual |
Performance
SealMiner A3 Pro Air (290TH/s) has the hashrate edge for raw output potential.
Efficiency
SealMiner A3 Pro Air (290TH/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 (151TH/s) or SealMiner A3 Pro Air (290TH/s)?
SealMiner A3 Pro Air (290TH/s) has a higher hashrate of 290 TH/s compared to Antminer S21 (151TH/s)'s 151 TH/s.
Is Antminer S21 (151TH/s) more efficient than SealMiner A3 Pro Air (290TH/s)?
SealMiner A3 Pro Air (290TH/s) is more energy efficient at 12.50 J/TH.
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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