Bitmain Antminer S19 XP (134Th/s) vs Antminer S21 Hydro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S19 XP (134Th/s) | Specification | Antminer S21 Hydro |
|---|---|---|
| 134.0 TH/s | Hashrate | 335.0 TH/s |
| 2,881 W | Power Consumption | 5,360 W |
| 21.5 J/TH | Efficiency | 16.0 J/TH |
| — | Noise Level | 50 dB |
| 14.4 kg | Weight | 15.8 kg |
| 9,830 BTU/hr | BTU Output | 18,288 BTU/hr |
| 22/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S19 XP (134Th/s)
Antminer S21 Hydro
Based on BTC price of $79,091 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Antminer S21 Hydro, which leads on 4 of 6 weighted factors (efficiency, hashrate, home mining score, noise level). The standout gap is 150% more hashrate (134 vs 335 TH/s) in the Antminer S21 Hydro's favour. The Bitmain Antminer S19 XP (134Th/s) claws back ground on power consumption and price-performance. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Bitmain Antminer S19 XP (134Th/s) and Antminer S21 Hydro diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21 Hydro 150% more hashrate (134 vs 335 TH/s)
- Bitmain Antminer S19 XP (134Th/s) 46% better power draw (2,881 vs 5,360 W)
- Antminer S21 Hydro 26% better efficiency (21.5 vs 16.0 J/TH)
- Bitmain Antminer S19 XP (134Th/s) 9% better weight (14.4 vs 15.8 kg)
- Antminer S21 Hydro 86% more heat output (9,830 vs 18,288 BTU/hr)
- Antminer S21 Hydro 100% more home mining score (22.0 vs 44.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Bitmain Antminer S19 XP (134Th/s) | Metric | Antminer S21 Hydro |
|---|---|---|
| $483 | Upfront cost (MSRP) | $9,500 |
| -$2.04 | Daily net profit | -$0.67 |
| -$1,227 | Net after 1 year | -$9,745 |
| -$1,970 | Net after 2 years | -$9,990 |
| -$2,714 | Net after 3 years | -$10,235 |
| 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
Antminer S21 HydroScore: 44/100. 50 dB noise level.
Best for Efficiency
Antminer S21 Hydro16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S19 XP (134Th/s) vs Antminer S21 Hydro: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21 Hydro is more profitable at $-0.67/day compared to $-2.04/day for the Bitmain Antminer S19 XP (134Th/s). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S19 XP (134Th/s) or Antminer S21 Hydro?
The Antminer S21 Hydro is quieter at 50 dB compared to the Bitmain Antminer S19 XP (134Th/s) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S19 XP (134Th/s) or Antminer S21 Hydro?
The Antminer S21 Hydro scores 44/100 on our Home Mining Score (vs 22/100 for the Bitmain Antminer S19 XP (134Th/s)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer S19 XP (134Th/s) and Antminer S21 Hydro on J/TH?
The Bitmain Antminer S19 XP (134Th/s) runs at 21.5 J/TH while the Antminer S21 Hydro runs at 16.0 J/TH — a difference of 5.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 26% better efficiency (21.5 vs 16.0 J/TH).