Antminer S21 XP vs NerdQAxe
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 XP | Specification | NerdQAxe |
|---|---|---|
| 270.0 TH/s | Taux de hachage | 2.0 TH/s |
| 3,645 W | Consommation électrique | 80 W |
| 13.5 J/TH | Efficiency | 40.0 J/TH |
| 75 dB | Niveau de bruit | 40 dB |
| 15.4 kg | Weight | 0.4 kg |
| 12,437 BTU/hr | BTU Output | 273 BTU/hr |
| 30/100 | Home Mining Score | 71/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Antminer S21 XP
NerdQAxe
Based on BTC price of $63,093 and current network difficulty as of Jun 4, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Antminer S21 XP comes out ahead — it takes 3 of 6 (efficacité, hashrate, rapport qualité-prix). Its biggest concrete edge: 13400% more hashrate (270.0 vs 2.0 TH/s). That said, the NerdQAxe isn't beaten everywhere — it still wins 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
The Antminer S21 XP and NerdQAxe diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21 XP 13400% more hashrate (270.0 vs 2.0 TH/s)
- NerdQAxe 98% better power draw (3,645.0 vs 80.0 W)
- Antminer S21 XP 66% better efficacité (13.5 vs 40.0 J/TH)
- NerdQAxe 47% better noise (75.0 vs 40.0 dB)
- NerdQAxe 97% better weight (15.4 vs 0.4 kg)
- Antminer S21 XP 4456% more heat output (12,437 vs 273 BTU/hr)
- NerdQAxe 137% more score de minage domestique (30.0 vs 71.0)
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.
| Antminer S21 XP | Metric | NerdQAxe |
|---|---|---|
| $8,200 | Upfront cost (MSRP) | $249 |
| -$1.04 | Daily net profit | -$0.13 |
| -$8,580 | Net after 1 year | -$298 |
| -$8,960 | Net after 2 years | -$347 |
| -$9,340 | Net after 3 years | -$397 |
| 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
NerdQAxeScore: 71/100. 40 dB noise level.
Best for Efficiency
Antminer S21 XP13.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer S21 XP vs NerdQAxe: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the NerdQAxe is more profitable at $-0.13/day compared to $-1.04/day for the Antminer S21 XP. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer S21 XP vs NerdQAxe: which runs at a lower noise level?
The NerdQAxe is quieter at 40 dB compared to the Antminer S21 XP at 75 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer S21 XP or NerdQAxe?
The NerdQAxe scores 71/100 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.
What is the efficiency difference between Antminer S21 XP and NerdQAxe?
The Antminer S21 XP runs at 13.5 J/TH while the NerdQAxe runs at 40.0 J/TH — a difference of 26.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 66% better efficacité (13.5 vs 40.0 J/TH).