Antminer S21 XP vs Bitmain Antminer S9i (14Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 XP | Specification | Bitmain Antminer S9i (14Th) |
|---|---|---|
| 270.0 TH/s | Taux de hachage | 14.0 TH/s |
| 3,645 W | Consommation électrique | 1,320 W |
| 13.5 J/TH | Efficiency | 94.3 J/TH |
| 75 dB | Niveau de bruit | — |
| 15.4 kg | Weight | 4.2 kg |
| 12,437 BTU/hr | BTU Output | 4,504 BTU/hr |
| 30/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S21 XP
Bitmain Antminer S9i (14Th)
Based on BTC price of $62,980 and current network difficulty as of Jun 4, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Antminer S21 XP, which leads on 3 of 6 weighted factors (efficacité, hashrate, niveau sonore). Its biggest concrete edge: 1829% more hashrate (270.0 vs 14.0 TH/s). The Bitmain Antminer S9i (14Th) holds the edge in consommation électrique and score de minage domestique and rapport qualité-prix. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Antminer S21 XP and Bitmain Antminer S9i (14Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21 XP 1829% more hashrate (270.0 vs 14.0 TH/s)
- Bitmain Antminer S9i (14Th) 64% better power draw (3,645 vs 1,320 W)
- Antminer S21 XP 86% better efficacité (13.5 vs 94.3 J/TH)
- Bitmain Antminer S9i (14Th) 73% better weight (15.4 vs 4.2 kg)
- Antminer S21 XP 176% more heat output (12,437 vs 4,504 BTU/hr)
- Bitmain Antminer S9i (14Th) 3% more score de minage domestique (30.0 vs 31.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Antminer S21 XP | Metric | Bitmain Antminer S9i (14Th) |
|---|---|---|
| $8,200 | Upfront cost (MSRP) | $65 |
| -$1.06 | Daily net profit | -$2.77 |
| -$8,585 | Net after 1 year | -$1,076 |
| -$8,970 | Net after 2 years | -$2,086 |
| -$9,355 | Net after 3 years | -$3,097 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitmain Antminer S9i (14Th)Score: 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 Bitmain Antminer S9i (14Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 XP is more profitable at $-1.06/day compared to $-2.77/day for the Bitmain Antminer S9i (14Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer S21 XP or the Bitmain Antminer S9i (14Th) better for noise-sensitive spaces?
The Antminer S21 XP is quieter at 75 dB compared to the Bitmain Antminer S9i (14Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Antminer S21 XP or the Bitmain Antminer S9i (14Th)?
The Bitmain Antminer S9i (14Th) 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.
Antminer S21 XP vs Bitmain Antminer S9i (14Th): how much does the efficiency gap matter?
The Antminer S21 XP runs at 13.5 J/TH while the Bitmain Antminer S9i (14Th) runs at 94.3 J/TH — a difference of 80.8 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 86% better efficacité (13.5 vs 94.3 J/TH).