Bitmain Antminer A3 (815Gh) vs Antminer D9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer A3 (815Gh) | Specification | Antminer D9 |
|---|---|---|
| 815.0 GH/s | Hashrate | 1,770.0 GH/s |
| 1,275 W | Power Consumption | 2,839 W |
| 1,564.4 J/TH | Efficiency | 1,604.0 J/TH |
| — | Noise Level | 75 dB |
| 4,200.0 kg | Weight | 16.1 kg |
| 4,350 BTU/hr | BTU Output | 9,687 BTU/hr |
| 31/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| Blake2b | Algorithm | X11 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer A3 (815Gh)
Antminer D9
Based on BTC price of $78,221 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer D9 wins on 4 of 6 factors (hashrate, home mining score, noise level, price-performance). Its biggest concrete edge: 117% more hashrate (0.8 vs 1.8 TH/s). The Bitmain Antminer A3 (815Gh) holds the edge in efficiency and power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer A3 (815Gh) and Antminer D9 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer D9 117% more hashrate (0.8 vs 1.8 TH/s)
- Bitmain Antminer A3 (815Gh) 55% better power draw (1,275 vs 2,839 W)
- Bitmain Antminer A3 (815Gh) 2% better efficiency (1,564 vs 1,604 J/TH)
- Antminer D9 100% better weight (4,200.0 vs 16.1 kg)
- Antminer D9 123% more heat output (4,350 vs 9,687 BTU/hr)
- Antminer D9 16% more home mining score (31.0 vs 36.0)
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 A3 (815Gh) | Metric | Antminer D9 |
|---|---|---|
| $29,718 | Upfront cost (MSRP) | $3,000 |
| -$3.03 | Daily net profit | -$6.75 |
| -$30,824 | Net after 1 year | -$5,464 |
| -$31,930 | Net after 2 years | -$7,927 |
| -$33,037 | Net after 3 years | -$10,391 |
| 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 D9Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer A3 (815Gh)1,564.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer A3 (815Gh) vs Antminer D9: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer A3 (815Gh) is more profitable at $-3.03/day compared to $-6.75/day for the Antminer D9. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer A3 (815Gh) vs Antminer D9: which runs at a lower noise level?
The Antminer D9 is quieter at 75 dB compared to the Bitmain Antminer A3 (815Gh) 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 A3 (815Gh) or the Antminer D9?
The Antminer D9 scores 36/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer A3 (815Gh)). 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 A3 (815Gh) and Antminer D9?
The Bitmain Antminer A3 (815Gh) runs at 1,564.4 J/TH while the Antminer D9 runs at 1,604.0 J/TH — a difference of 39.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 2% better efficiency (1,564 vs 1,604 J/TH).