Antminer S21 Pro vs NerdQAxe++
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 Pro | Specification | NerdQAxe++ |
|---|---|---|
| 234.0 TH/s | Hashrate | 4.0 TH/s |
| 3,510 W | Power Consumption | 120 W |
| 15.0 J/TH | Efficiency | 30.0 J/TH |
| 75 dB | Noise Level | 42 dB |
| 15.0 kg | Weight | 0.5 kg |
| 11,976 BTU/hr | BTU Output | 409 BTU/hr |
| 30/100 | Home Mining Score | 58/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Antminer S21 Pro
NerdQAxe++
Based on BTC price of $78,028 and current network difficulty as of Apr 26, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S21 Pro wins on 3 of 6 factors (efficiency, hashrate, price-performance). The NerdQAxe++ holds the edge in power consumption and home mining score and noise level. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
Antminer S21 Pro$0.18/day higher profit at current rates.
Best for Home Mining
NerdQAxe++Score: 58/100. 42 dB noise level.
Best for Efficiency
Antminer S21 Pro15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21 Pro or NerdQAxe++ more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Pro is more profitable at $0.04/day compared to $-0.14/day for the NerdQAxe++. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21 Pro or NerdQAxe++?
The NerdQAxe++ is quieter at 42 dB compared to the Antminer S21 Pro at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S21 Pro or NerdQAxe++?
The NerdQAxe++ scores 58/100 on our Home Mining Score (vs 30/100 for the Antminer S21 Pro). 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 Pro and NerdQAxe++?
The Antminer S21 Pro runs at 15.0 J/TH while the NerdQAxe++ runs at 30.0 J/TH — a difference of 15.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.