Antminer S21 XP vs Canaan AvalonMiner 821
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 XP | Specification | Canaan AvalonMiner 821 |
|---|---|---|
| 270.0 TH/s | Hashrate | 11.5 TH/s |
| 3,645 W | Power Consumption | 1,200 W |
| 13.5 J/TH | Efficiency | 104.4 J/TH |
| 75 dB | Noise Level | — |
| 15.4 kg | Weight | 4,700.0 kg |
| 12,437 BTU/hr | BTU Output | 4,094 BTU/hr |
| 30/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Canaan |
Profitability Comparison
Antminer S21 XP
Canaan AvalonMiner 821
Based on BTC price of $70,862 and current network difficulty as of Mar 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S21 XP wins on 4 of 6 factors (efficiency, hashrate, noise level, price-performance). The Canaan AvalonMiner 821 holds the edge in power consumption and home mining score. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Canaan AvalonMiner 821Score: 31/100. 0 dB noise level.
Best for Efficiency
Antminer S21 XP13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21 XP or Canaan AvalonMiner 821 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 XP is more profitable at $-0.46/day compared to $-2.53/day for the Canaan AvalonMiner 821. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21 XP or Canaan AvalonMiner 821?
The Antminer S21 XP is quieter at 75 dB compared to the Canaan AvalonMiner 821 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S21 XP or Canaan AvalonMiner 821?
The Canaan AvalonMiner 821 scores 31/100 on our Home Mining Score (vs 30/100 for the Antminer S21 XP). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Antminer S21 XP and Canaan AvalonMiner 821?
The Antminer S21 XP runs at 13.5 J/TH while the Canaan AvalonMiner 821 runs at 104.4 J/TH — a difference of 90.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.