Bitmain Antminer S21 Hyd (335Th) vs Bitaxe Ultra
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Hyd (335Th) | Specification | Bitaxe Ultra |
|---|---|---|
| 335.0 TH/s | Hashrate | 500.0 GH/s |
| 5,360 W | Power Consumption | 15 W |
| 16.0 J/TH | Efficiency | 30.0 J/TH |
| — | Noise Level | 35 dB |
| 14.2 kg | Weight | 0.3 kg |
| 18,288 BTU/hr | BTU Output | 51 BTU/hr |
| 16/100 | Home Mining Score | 70/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S21 Hyd (335Th)
Bitaxe Ultra
Based on BTC price of $80,754 and current network difficulty as of May 9, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Antminer S21 Hyd (335Th) wins on 3 of 6 factors (efficiency, hashrate, price-performance). The Bitaxe Ultra 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
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitaxe UltraScore: 70/100. 35 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Hyd (335Th)16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 Hyd (335Th) or Bitaxe Ultra more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitaxe Ultra is more profitable at $-0.02/day compared to $-0.03/day for the Bitmain Antminer S21 Hyd (335Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21 Hyd (335Th) or Bitaxe Ultra?
The Bitaxe Ultra is quieter at 35 dB compared to the Bitmain Antminer S21 Hyd (335Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21 Hyd (335Th) or Bitaxe Ultra?
The Bitaxe Ultra scores 70/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 Hyd (335Th)). 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 Bitmain Antminer S21 Hyd (335Th) and Bitaxe Ultra?
The Bitmain Antminer S21 Hyd (335Th) runs at 16.0 J/TH while the Bitaxe Ultra runs at 30.0 J/TH — a difference of 14.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.