Bitmain Antminer S21 XP Immersion vs Antminer Slim Edition (S9)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP Immersion | Specification | Antminer Slim Edition (S9) |
|---|---|---|
| 300.0 TH/s | Taux de hachage | 12.0 TH/s |
| 4,050 W | Consommation électrique | 1,100 W |
| 13.5 J/TH | Efficiency | 91.7 J/TH |
| 50 dB | Niveau de bruit | 65 dB |
| 14.4 kg | Weight | 3.5 kg |
| 13,819 BTU/hr | BTU Output | 3,753 BTU/hr |
| 44/100 | Home Mining Score | 52/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S21 XP Immersion
Antminer Slim Edition (S9)
Based on BTC price of $78,179 and current network difficulty as of May 17, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 XP Immersion edges it: 4 of 6 factors go its way (efficacité, hashrate, niveau sonore, rapport qualité-prix). Its biggest concrete edge: 2400% more hashrate (300.0 vs 12.0 TH/s). That said, the Antminer Slim Edition (S9) isn't beaten everywhere — it still wins consommation électrique and score de minage domestique. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S21 XP Immersion and Antminer Slim Edition (S9) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 XP Immersion 2400% more hashrate (300.0 vs 12.0 TH/s)
- Antminer Slim Edition (S9) 73% better power draw (4,050 vs 1,100 W)
- Bitmain Antminer S21 XP Immersion 85% better efficacité (13.5 vs 91.7 J/TH)
- Bitmain Antminer S21 XP Immersion 23% better noise (50.0 vs 65.0 dB)
- Antminer Slim Edition (S9) 76% better weight (14.4 vs 3.5 kg)
- Bitmain Antminer S21 XP Immersion 268% more heat output (13,819 vs 3,753 BTU/hr)
- Antminer Slim Edition (S9) 18% more score de minage domestique (44.0 vs 52.0)
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.
| Bitmain Antminer S21 XP Immersion | Metric | Antminer Slim Edition (S9) |
|---|---|---|
| $1,593 | Upfront cost (MSRP) | $350 |
| $1.07 | Daily net profit | -$2.21 |
| -$1,201 | Net after 1 year | -$1,156 |
| -$810 | Net after 2 years | -$1,962 |
| -$418 | Net after 3 years | -$2,768 |
| Takes ~4.1 years to pay back at current rates | 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
Bitmain Antminer S21 XP Immersion$3.28/day higher profit at current rates.
Best for Home Mining
Antminer Slim Edition (S9)Score: 52/100. 65 dB noise level.
Best for Efficiency
Bitmain Antminer S21 XP Immersion13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 XP Immersion or Antminer Slim Edition (S9) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP Immersion is more profitable at $1.07/day compared to $-2.21/day for the Antminer Slim Edition (S9). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S21 XP Immersion or the Antminer Slim Edition (S9) better for noise-sensitive spaces?
The Bitmain Antminer S21 XP Immersion is quieter at 50 dB compared to the Antminer Slim Edition (S9) at 65 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S21 XP Immersion vs Antminer Slim Edition (S9): which fits a residential setup better?
The Antminer Slim Edition (S9) scores 52/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21 XP Immersion). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21 XP Immersion vs Antminer Slim Edition (S9): how much does the efficiency gap matter?
The Bitmain Antminer S21 XP Immersion runs at 13.5 J/TH while the Antminer Slim Edition (S9) runs at 91.7 J/TH — a difference of 78.2 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 85% better efficacité (13.5 vs 91.7 J/TH).