Antminer S21 XP vs Bitmain Antminer Z15
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 XP | Specification | Bitmain Antminer Z15 |
|---|---|---|
| 270.0 TH/s | Hashrate | 420.0 Ksol/s |
| 3,645 W | Power Consumption | 1,510 W |
| 13.5 J/TH | Efficiency | 3.6 J/TH |
| 75 dB | Noise Level | — |
| 15.4 kg | Weight | 9,000.0 kg |
| 12,437 BTU/hr | BTU Output | 5,152 BTU/hr |
| 30/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S21 XP
Bitmain Antminer Z15
Based on BTC price of $66,528 and current network difficulty as of Mar 29, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Antminer Z15 wins on 4 of 6 factors (efficiency, hashrate, power consumption, price-performance). The Antminer S21 XP holds the edge in 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
Bitmain Antminer Z15$9.81/day higher profit at current rates.
Best for Home Mining
Antminer S21 XPScore: 30/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer Z153.6 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S21 XP or Bitmain Antminer Z15 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z15 is more profitable at $9.50/day compared to $-0.31/day for the Antminer S21 XP. 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 Bitmain Antminer Z15?
The Antminer S21 XP is quieter at 75 dB compared to the Bitmain Antminer Z15 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 Bitmain Antminer Z15?
The Antminer S21 XP scores 30/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer Z15). 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 Bitmain Antminer Z15?
The Antminer S21 XP runs at 13.5 J/TH while the Bitmain Antminer Z15 runs at 3.6 J/TH — a difference of 9.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.