Bitmain Antminer A3 (815Gh) vs StrongU STU-U2
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer A3 (815Gh) | Specification | StrongU STU-U2 |
|---|---|---|
| 815.0 GH/s | Hashrate | 7.0 TH/s |
| 1,275 W | Power Consumption | 1,600 W |
| 1,564.4 J/TH | Efficiency | 228.6 J/TH |
| — | Noise Level | — |
| 4,200.0 kg | Weight | 6,500.0 kg |
| 4,350 BTU/hr | BTU Output | 5,459 BTU/hr |
| 31/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| Blake2b | Algorithm | Blake2b |
| Bitmain | Manufacturer | StrongU |
Profitability Comparison
Bitmain Antminer A3 (815Gh)
StrongU STU-U2
Based on BTC price of $73,977 and current network difficulty as of Mar 16, 2026. Actual results vary.
Verdict
Based on specs, the StrongU STU-U2 offers 85% better efficiency at 228.6 J/TH compared to the Bitmain Antminer A3 (815Gh) at 1,564.4 J/TH. This directly impacts daily operating costs and long-term profitability.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitmain Antminer A3 (815Gh)Score: 31/100. 0 dB noise level.
Best for Efficiency
StrongU STU-U2228.6 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer A3 (815Gh) or StrongU STU-U2 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 $-3.62/day for the StrongU STU-U2. 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 StrongU STU-U2?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Bitmain Antminer A3 (815Gh) or StrongU STU-U2?
The Bitmain Antminer A3 (815Gh) scores 31/100 on our Home Mining Score (vs 28/100 for the StrongU STU-U2). 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 StrongU STU-U2?
The Bitmain Antminer A3 (815Gh) runs at 1,564.4 J/TH while the StrongU STU-U2 runs at 228.6 J/TH — a difference of 1,335.9 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.