Antminer S3 (478GH/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 S3 (478GH/s)
Option 2
AvalonMiner 821 (11.5TH/s)
Antminer S3 (478GH/s) leads this comparison
Antminer S3 (478GH/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 S3 (478GH/s) | AvalonMiner 821 (11.5TH/s) | Advantage |
|---|---|---|---|
| Brand | Antminer | AvalonMiner | Contextual |
| Model | S3 | A8 | Contextual |
| Hashrate | 478 GH/s | 11.5 TH/s Best | AvalonMiner 821 (11.5TH/s) |
| Power Consumption | 366W Best | 1200W | Antminer S3 (478GH/s) |
| Efficiency | 0.77 J/GH Best | 104.35 J/TH | Antminer S3 (478GH/s) |
| Daily energy use | 8.8 kWh Best | 28.8 kWh | Antminer S3 (478GH/s) |
| Net Daily Profit (Est.) | -$0.51 Best | -$1.36 | Antminer S3 (478GH/s) |
| Monthly Profit (Est.) | -$15.21 Best | -$40.74 | Antminer S3 (478GH/s) |
| Price | N/A | N/A | Contextual |
| Estimated ROI | N/A | N/A | Contextual |
| Cooling | AIR | AIR | Contextual |
| Dimensions | 137 x 331 x 160 mm | 150 x 370 x 136 mm | Contextual |
| Weight | 17000 g | 4700 g Best | AvalonMiner 821 (11.5TH/s) |
Performance
AvalonMiner 821 (11.5TH/s) has the hashrate edge for raw output potential.
Efficiency
Antminer S3 (478GH/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 S3 (478GH/s) or AvalonMiner 821 (11.5TH/s)?
AvalonMiner 821 (11.5TH/s) has a higher hashrate of 11.5 TH/s compared to Antminer S3 (478GH/s)'s 478 GH/s.
Is Antminer S3 (478GH/s) more efficient than AvalonMiner 821 (11.5TH/s)?
Yes, Antminer S3 (478GH/s) is more energy efficient at 0.77 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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