Bitmain Antminer S21+ Hyd vs NerdNOS
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21+ Hyd | Specification | NerdNOS |
|---|---|---|
| 319.0 TH/s | Taux de hachage | 500.0 GH/s |
| 4,785 W | Consommation électrique | 12 W |
| 15.0 J/TH | Efficiency | 24.0 J/TH |
| 50 dB | Niveau de bruit | 30 dB |
| 17.5 kg | Weight | 0.2 kg |
| 16,326 BTU/hr | BTU Output | 41 BTU/hr |
| 44/100 | Home Mining Score | 70/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S21+ Hyd
NerdNOS
Based on BTC price of $78,235 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21+ Hyd, which leads on 3 of 6 weighted factors (efficacité, hashrate, rapport qualité-prix). The standout gap is 63700% more hashrate (319.0 vs 0.5 TH/s) in the Bitmain Antminer S21+ Hyd's favour. The NerdNOS holds the edge in consommation électrique and score de minage domestique and niveau sonore. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the Bitmain Antminer S21+ Hyd and NerdNOS actually differ, with the gap quantified:
- Bitmain Antminer S21+ Hyd 63700% more hashrate (319.0 vs 0.5 TH/s)
- NerdNOS 100% better power draw (4,785.0 vs 12.0 W)
- Bitmain Antminer S21+ Hyd 38% better efficacité (15.0 vs 24.0 J/TH)
- NerdNOS 40% better noise (50.0 vs 30.0 dB)
- NerdNOS 99% better weight (17.5 vs 0.2 kg)
- Bitmain Antminer S21+ Hyd 39818% more heat output (16,326.4 vs 40.9 BTU/hr)
- NerdNOS 59% more score de minage domestique (44.0 vs 70.0)
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 S21+ Hyd | Metric | NerdNOS |
|---|---|---|
| $2,499 | Upfront cost (MSRP) | $59 |
| $0.00 | Daily net profit | -$0.01 |
| -$2,499 | Net after 1 year | -$63 |
| -$2,498 | Net after 2 years | -$67 |
| -$2,498 | Net after 3 years | -$71 |
| Takes ~8,833.6 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+ Hyd$0.01/day higher profit at current rates.
Best for Home Mining
NerdNOSScore: 70/100. 30 dB noise level.
Best for Efficiency
Bitmain Antminer S21+ Hyd15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21+ Hyd or NerdNOS more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21+ Hyd is more profitable at $0.00/day compared to $-0.01/day for the NerdNOS. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21+ Hyd or NerdNOS?
The NerdNOS is quieter at 30 dB compared to the Bitmain Antminer S21+ Hyd at 50 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer S21+ Hyd or NerdNOS?
The NerdNOS scores 70/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21+ Hyd). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21+ Hyd vs NerdNOS: how much does the efficiency gap matter?
The Bitmain Antminer S21+ Hyd runs at 15.0 J/TH while the NerdNOS runs at 24.0 J/TH — a difference of 9.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 38% better efficacité (15.0 vs 24.0 J/TH).