Bitmain Antminer S21 XP+ Hyd (500Th)
Bitmain Antminer S21 XP+ Hyd (500Th) vs NerdOctaxe Gamma
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP+ Hyd (500Th) | Specification | NerdOctaxe Gamma |
|---|---|---|
| 500.0 TH/s | Taux de hachage | 8.0 TH/s |
| 5,500 W | Consommation électrique | 200 W |
| 11.0 J/TH | Efficiency | 25.0 J/TH |
| 50 dB | Niveau de bruit | 45 dB |
| 13.8 kg | Weight | 0.8 kg |
| 18,766 BTU/hr | BTU Output | 682 BTU/hr |
| 44/100 | Home Mining Score | 61/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S21 XP+ Hyd (500Th)
NerdOctaxe Gamma
Based on BTC price of $78,162 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 XP+ Hyd (500Th) edges it: 3 of 6 factors go its way (efficacité, hashrate, rapport qualité-prix). The standout gap is 6150% more hashrate (500.0 vs 8.0 TH/s) in the Bitmain Antminer S21 XP+ Hyd (500Th)'s favour. The NerdOctaxe Gamma holds the edge in consommation électrique and score de minage domestique and niveau sonore. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S21 XP+ Hyd (500Th) and NerdOctaxe Gamma diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 XP+ Hyd (500Th) 6150% more hashrate (500.0 vs 8.0 TH/s)
- NerdOctaxe Gamma 96% better power draw (5,500 vs 200 W)
- Bitmain Antminer S21 XP+ Hyd (500Th) 56% better efficacité (11.0 vs 25.0 J/TH)
- NerdOctaxe Gamma 10% better noise (50.0 vs 45.0 dB)
- NerdOctaxe Gamma 94% better weight (13.8 vs 0.8 kg)
- Bitmain Antminer S21 XP+ Hyd (500Th) 2650% more heat output (18,766 vs 682 BTU/hr)
- NerdOctaxe Gamma 39% more score de minage domestique (44.0 vs 61.0)
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+ Hyd (500Th) | Metric | NerdOctaxe Gamma |
|---|---|---|
| $9,125 | Upfront cost (MSRP) | $599 |
| $4.78 | Daily net profit | -$0.19 |
| -$7,378 | Net after 1 year | -$669 |
| -$5,632 | Net after 2 years | -$739 |
| -$3,886 | Net after 3 years | -$810 |
| Takes ~5.2 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+ Hyd (500Th)$4.98/day higher profit at current rates.
Best for Home Mining
NerdOctaxe GammaScore: 61/100. 45 dB noise level.
Best for Efficiency
Bitmain Antminer S21 XP+ Hyd (500Th)11.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S21 XP+ Hyd (500Th) vs NerdOctaxe Gamma: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP+ Hyd (500Th) is more profitable at $4.78/day compared to $-0.19/day for the NerdOctaxe Gamma. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer S21 XP+ Hyd (500Th) or NerdOctaxe Gamma?
The NerdOctaxe Gamma is quieter at 45 dB compared to the Bitmain Antminer S21 XP+ Hyd (500Th) at 50 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer S21 XP+ Hyd (500Th) or the NerdOctaxe Gamma?
The NerdOctaxe Gamma scores 61/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21 XP+ Hyd (500Th)). 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 S21 XP+ Hyd (500Th) and NerdOctaxe Gamma on J/TH?
The Bitmain Antminer S21 XP+ Hyd (500Th) runs at 11.0 J/TH while the NerdOctaxe Gamma runs at 25.0 J/TH — a difference of 14.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 56% better efficacité (11.0 vs 25.0 J/TH).
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