Bitmain Antminer S9j (14.5Th) vs NerdQAxe
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S9j (14.5Th) | Specification | NerdQAxe |
|---|---|---|
| 14.5 TH/s | Hashrate | 2.0 TH/s |
| 1,350 W | Power Consumption | 80 W |
| 93.1 J/TH | Efficiency | 40.0 J/TH |
| — | Noise Level | 40 dB |
| 4,200.0 kg | Weight | 0.4 kg |
| 4,606 BTU/hr | BTU Output | 273 BTU/hr |
| 31/100 | Home Mining Score | 71/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S9j (14.5Th)
NerdQAxe
Based on BTC price of $79,051 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the NerdQAxe comes out ahead — it takes 4 of 6 (efficiency, power consumption, home mining score, noise level). Where it pulls away hardest is 94% better power draw (1,350.0 vs 80.0 W). The Bitmain Antminer S9j (14.5Th) holds the edge in hashrate and price-performance. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S9j (14.5Th) and NerdQAxe sit on each measurable spec:
- Bitmain Antminer S9j (14.5Th) 625% more hashrate (14.5 vs 2.0 TH/s)
- NerdQAxe 94% better power draw (1,350.0 vs 80.0 W)
- NerdQAxe 57% better efficiency (93.1 vs 40.0 J/TH)
- NerdQAxe 100% better weight (4,200.0 vs 0.4 kg)
- Bitmain Antminer S9j (14.5Th) 1587% more heat output (4,606 vs 273 BTU/hr)
- NerdQAxe 129% more home mining score (31.0 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.
| Bitmain Antminer S9j (14.5Th) | Metric | NerdQAxe |
|---|---|---|
| $65 | Upfront cost (MSRP) | $249 |
| -$2.71 | Daily net profit | -$0.12 |
| -$1,055 | Net after 1 year | -$293 |
| -$2,045 | Net after 2 years | -$336 |
| -$3,035 | Net after 3 years | -$380 |
| 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
NerdQAxe40.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S9j (14.5Th) 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 $-0.12/day compared to $-2.71/day for the Bitmain Antminer S9j (14.5Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S9j (14.5Th) or the NerdQAxe better for noise-sensitive spaces?
The NerdQAxe is quieter at 40 dB compared to the Bitmain Antminer S9j (14.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer S9j (14.5Th) or the NerdQAxe?
The NerdQAxe scores 71/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer S9j (14.5Th)). 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 Bitmain Antminer S9j (14.5Th) and NerdQAxe?
The Bitmain Antminer S9j (14.5Th) runs at 93.1 J/TH while the NerdQAxe runs at 40.0 J/TH — a difference of 53.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 57% better efficiency (93.1 vs 40.0 J/TH).