Bitmain Antminer A3 (815Gh) vs Halong Mining DragonMint B52
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer A3 (815Gh) | Specification | Halong Mining DragonMint B52 |
|---|---|---|
| 815.0 GH/s | Taux de hachage | 3.8 TH/s |
| 1,275 W | Consommation électrique | 1,380 W |
| 1,564.4 J/TH | Efficiency | 360.3 J/TH |
| — | Niveau de bruit | — |
| 4,200.0 kg | Weight | 6,000.0 kg |
| 4,350 BTU/hr | BTU Output | 4,709 BTU/hr |
| 31/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| Blake2b | Algorithme | Blake2b |
| Bitmain | Manufacturer | Halong Mining |
Profitability Comparison
Bitmain Antminer A3 (815Gh)
Halong Mining DragonMint B52
Based on BTC price of $78,226 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Halong Mining DragonMint B52, which leads on 2 of 3 weighted factors (efficacité, hashrate). Where it pulls away hardest is 370% more hashrate (0.8 vs 3.8 TH/s). The Bitmain Antminer A3 (815Gh) claws back ground on consommation électrique. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitmain Antminer A3 (815Gh) and Halong Mining DragonMint B52 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Halong Mining DragonMint B52 370% more hashrate (0.8 vs 3.8 TH/s)
- Bitmain Antminer A3 (815Gh) 8% better power draw (1,275 vs 1,380 W)
- Halong Mining DragonMint B52 77% better efficacité (1,564 vs 360 J/TH)
- Bitmain Antminer A3 (815Gh) 30% better weight (4,200 vs 6,000 kg)
- Halong Mining DragonMint B52 8% more heat output (4,350 vs 4,709 BTU/hr)
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 A3 (815Gh) | Metric | Halong Mining DragonMint B52 |
|---|---|---|
| $29,718 | Upfront cost (MSRP) | — |
| -$3.03 | Daily net profit | -$3.17 |
| -$30,824 | Net after 1 year | -$1,159 |
| -$31,930 | Net after 2 years | -$2,317 |
| -$33,037 | Net after 3 years | -$3,476 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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
TieBoth miners are equally suitable for home use.
Best for Efficiency
Halong Mining DragonMint B52360.3 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer A3 (815Gh) or Halong Mining DragonMint B52 more profitable?
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 $-3.17/day for the Halong Mining DragonMint B52. 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 Halong Mining DragonMint B52?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Bitmain Antminer A3 (815Gh) vs Halong Mining DragonMint B52: which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
How far apart are the Bitmain Antminer A3 (815Gh) and Halong Mining DragonMint B52 on J/TH?
The Bitmain Antminer A3 (815Gh) runs at 1,564.4 J/TH while the Halong Mining DragonMint B52 runs at 360.3 J/TH — a difference of 1,204.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 77% better efficacité (1,564 vs 360 J/TH).