Option 1
AvalonMiner 821 (11.5TH/s)
Option 2
L21 (550MH/s)
L21 (550MH/s) leads this comparison
L21 (550MH/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 | AvalonMiner 821 (11.5TH/s) | L21 (550MH/s) | Advantage |
|---|---|---|---|
| Brand | AvalonMiner | BW | Contextual |
| Model | A8 | L | Contextual |
| Hashrate | 11.5 TH/s Best | 550 MH/s | AvalonMiner 821 (11.5TH/s) |
| Power Consumption | 1200W | 950W Best | L21 (550MH/s) |
| Efficiency | 104.35 J/TH | 1.73 J/MH Best | L21 (550MH/s) |
| Daily energy use | 28.8 kWh | 22.8 kWh Best | L21 (550MH/s) |
| Net Daily Profit (Est.) | -$1.36 | -$1.16 Best | L21 (550MH/s) |
| Monthly Profit (Est.) | -$40.74 | -$34.74 Best | L21 (550MH/s) |
| Price | N/A | N/A | Contextual |
| Estimated ROI | N/A | N/A | Contextual |
| Cooling | AIR | AIR | Contextual |
| Dimensions | 150 x 370 x 136 mm | 130 x 350 x 155 mm | Contextual |
| Weight | 4700 g Best | 5750 g | AvalonMiner 821 (11.5TH/s) |
Performance
AvalonMiner 821 (11.5TH/s) has the hashrate edge for raw output potential.
Efficiency
L21 (550MH/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: AvalonMiner 821 (11.5TH/s) or L21 (550MH/s)?
AvalonMiner 821 (11.5TH/s) has a higher hashrate of 11.5 TH/s compared to L21 (550MH/s)'s 550 MH/s.
Is AvalonMiner 821 (11.5TH/s) more efficient than L21 (550MH/s)?
L21 (550MH/s) is more energy efficient at 1.73 J/MH.
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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