Bitmain Antminer S9k (13.5Th) vs Bitaxe Ultra
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9k (13.5Th) | Specification | Bitaxe Ultra |
|---|---|---|
| 13.5 TH/s | Hashrate | 500.0 GH/s |
| 1,310 W | Power Consumption | 15 W |
| 97.0 J/TH | Efficiency | 30.0 J/TH |
| — | Noise Level | 35 dB |
| 4,200.0 kg | Weight | 0.3 kg |
| 4,470 BTU/hr | BTU Output | 51 BTU/hr |
| 31/100 | Home Mining Score | 70/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S9k (13.5Th)
Bitaxe Ultra
Based on BTC price of $70,469 and current network difficulty as of Mar 25, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitaxe Ultra wins on 4 of 6 factors (efficiency, power consumption, home mining score, noise level). The Bitmain Antminer S9k (13.5Th) holds the edge in hashrate and price-performance. 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
Bitaxe Ultra30.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S9k (13.5Th) 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 $-2.73/day for the Bitmain Antminer S9k (13.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S9k (13.5Th) or Bitaxe Ultra?
The Bitaxe Ultra is quieter at 35 dB compared to the Bitmain Antminer S9k (13.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S9k (13.5Th) or Bitaxe Ultra?
The Bitaxe Ultra scores 70/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer S9k (13.5Th)). 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 S9k (13.5Th) and Bitaxe Ultra?
The Bitmain Antminer S9k (13.5Th) runs at 97.0 J/TH while the Bitaxe Ultra runs at 30.0 J/TH — a difference of 67.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.