Antminer B3 (780Hz) (780H/s) vs AvalonMiner 821 (11.5TH/s)
Compare pricing, hashrate, power draw, efficiency, ROI, and estimated hosted profitability before choosing your next mining setup.
Option 1
Antminer B3 (780Hz) (780H/s)
Option 2
AvalonMiner 821 (11.5TH/s)
Antminer B3 (780Hz) (780H/s) leads this comparison
Antminer B3 (780Hz) (780H/s) comes out ahead on more buyer-facing signals here. AvalonMiner 821 (11.5TH/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 B3 (780Hz) (780H/s) | AvalonMiner 821 (11.5TH/s) | Advantage |
|---|---|---|---|
| Brand | Antminer | AvalonMiner | Contextual |
| Model | B3 | A8 | Contextual |
| Hashrate | 780 H/s | 11.5 TH/s Best | AvalonMiner 821 (11.5TH/s) |
| Power Consumption | 360W Best | 1200W | Antminer B3 (780Hz) (780H/s) |
| Efficiency | 0.46 J/H Best | 104.35 J/TH | Antminer B3 (780Hz) (780H/s) |
| Daily energy use | 8.6 kWh Best | 28.8 kWh | Antminer B3 (780Hz) (780H/s) |
| Net Daily Profit (Est.) | -$0.52 Best | -$1.36 | Antminer B3 (780Hz) (780H/s) |
| Monthly Profit (Est.) | -$15.55 Best | -$40.74 | Antminer B3 (780Hz) (780H/s) |
| Price | N/A | N/A | Contextual |
| Estimated ROI | N/A | N/A | Contextual |
| Cooling | AIR | AIR | Contextual |
| Dimensions | 124 x 313 x 155 mm | 150 x 370 x 136 mm | Contextual |
| Weight | N/A | 4700 g | Contextual |
Performance
AvalonMiner 821 (11.5TH/s) has the hashrate edge for raw output potential.
Efficiency
Antminer B3 (780Hz) (780H/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 B3 (780Hz) (780H/s) or AvalonMiner 821 (11.5TH/s)?
AvalonMiner 821 (11.5TH/s) has a higher hashrate of 11.5 TH/s compared to Antminer B3 (780Hz) (780H/s)'s 780 H/s.
Is Antminer B3 (780Hz) (780H/s) more efficient than AvalonMiner 821 (11.5TH/s)?
Yes, Antminer B3 (780Hz) (780H/s) is more energy efficient at 0.46 J/H.
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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