SealMiner A2 Pro Air (255TH/s) vs Antminer S21 Pro (234TH/s)
Compare pricing, hashrate, power draw, efficiency, ROI, and estimated hosted profitability before choosing your next mining setup.
Option 1
SealMiner A2 Pro Air (255TH/s)
Option 2
Antminer S21 Pro (234TH/s)
Balanced match
SealMiner A2 Pro Air (255TH/s) and Antminer S21 Pro (234TH/s) are close enough that your final choice should come down to stock, delivery timing, and hosting preference.
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 | SealMiner A2 Pro Air (255TH/s) | Antminer S21 Pro (234TH/s) | Advantage |
|---|---|---|---|
| Brand | SealMiner | Antminer | Contextual |
| Model | A2 | S21 | Contextual |
| Hashrate | 255 TH/s Best | 234 TH/s | SealMiner A2 Pro Air (255TH/s) |
| Power Consumption | 3790W | 3510W Best | Antminer S21 Pro (234TH/s) |
| Efficiency | 14.86 J/TH Best | 15.00 J/TH | SealMiner A2 Pro Air (255TH/s) |
| Daily energy use | 91.0 kWh | 84.2 kWh Best | Antminer S21 Pro (234TH/s) |
| Net Daily Profit (Est.) | $2.56 Best | $2.35 | SealMiner A2 Pro Air (255TH/s) |
| Monthly Profit (Est.) | $76.87 Best | $70.37 | SealMiner A2 Pro Air (255TH/s) |
| Price | $3,008.29 | $1,713.44 Best | Antminer S21 Pro (234TH/s) |
| Estimated ROI | 39 mo | 24 mo Best | Antminer S21 Pro (234TH/s) |
| Cooling | AIR | AIR | Contextual |
| Dimensions | N/A | 400 x 290 x 195 mm | Contextual |
| Weight | 17000 g | N/A | Contextual |
Performance
SealMiner A2 Pro Air (255TH/s) has the hashrate edge for raw output potential.
Efficiency
SealMiner A2 Pro Air (255TH/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: SealMiner A2 Pro Air (255TH/s) or Antminer S21 Pro (234TH/s)?
SealMiner A2 Pro Air (255TH/s) has a higher hashrate of 255 TH/s compared to Antminer S21 Pro (234TH/s)'s 234 TH/s.
Is SealMiner A2 Pro Air (255TH/s) more efficient than Antminer S21 Pro (234TH/s)?
Yes, SealMiner A2 Pro Air (255TH/s) is more energy efficient at 14.86 J/TH.
Which miner has the better estimated ROI?
Antminer S21 Pro (234TH/s) has the stronger estimated payback period at 24 mo, based on current product pricing and $0.060/kWh hosted electricity.
Every Day You Wait is Revenue You Lose
Curious? Let’s connect to answer your questions.