Bitmain Antminer A3 (815Gh) vs Antminer D7
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer A3 (815Gh) | Specification | Antminer D7 |
|---|---|---|
| 815.0 GH/s | Hashrate | 1,286.0 GH/s |
| 1,275 W | Power Consumption | 3,148 W |
| 1,564.4 J/TH | Efficiency | 2,447.9 J/TH |
| — | Noise Level | 70 dB |
| 4,200.0 kg | Weight | 14.4 kg |
| 4,350 BTU/hr | BTU Output | 10,741 BTU/hr |
| 31/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| Blake2b | Algorithm | X11 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer A3 (815Gh)
Antminer D7
Based on BTC price of $78,221 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Antminer D7 edges it: 4 of 6 factors go its way (hashrate, home mining score, noise level, price-performance). Its biggest concrete edge: 58% more hashrate (0.8 vs 1.3 TH/s). That said, the Bitmain Antminer A3 (815Gh) isn't beaten everywhere — it still wins efficiency and power consumption. 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 A3 (815Gh) and Antminer D7 actually differ, with the gap quantified:
- Antminer D7 58% more hashrate (0.8 vs 1.3 TH/s)
- Bitmain Antminer A3 (815Gh) 59% better power draw (1,275 vs 3,148 W)
- Bitmain Antminer A3 (815Gh) 36% better efficiency (1,564 vs 2,448 J/TH)
- Antminer D7 100% better weight (4,200.0 vs 14.4 kg)
- Antminer D7 147% more heat output (4,350 vs 10,741 BTU/hr)
- Antminer D7 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 D7 |
|---|---|---|
| $29,718 | Upfront cost (MSRP) | $2,500 |
| -$3.03 | Daily net profit | -$7.51 |
| -$30,824 | Net after 1 year | -$5,241 |
| -$31,930 | Net after 2 years | -$7,982 |
| -$33,037 | Net after 3 years | -$10,722 |
| 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 D7Score: 36/100. 70 dB noise level.
Best for Efficiency
Bitmain Antminer A3 (815Gh)1,564.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer A3 (815Gh) or the Antminer D7?
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 $-7.51/day for the Antminer D7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer A3 (815Gh) or Antminer D7?
The Antminer D7 is quieter at 70 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 D7?
The Antminer D7 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.
How far apart are the Bitmain Antminer A3 (815Gh) and Antminer D7 on J/TH?
The Bitmain Antminer A3 (815Gh) runs at 1,564.4 J/TH while the Antminer D7 runs at 2,447.9 J/TH — a difference of 883.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 36% better efficiency (1,564 vs 2,448 J/TH).