Bitmain Antminer A3 (815Gh) vs Obelisk SC1 Immersion
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer A3 (815Gh) | Specification | Obelisk SC1 Immersion |
|---|---|---|
| 815.0 GH/s | Hashrate | 2.2 TH/s |
| 1,275 W | Power Consumption | 1,600 W |
| 1,564.4 J/TH | Efficiency | 727.3 J/TH |
| — | Noise Level | — |
| 4,200.0 kg | Weight | — |
| 4,350 BTU/hr | BTU Output | 5,459 BTU/hr |
| 31/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| Blake2b | Algorithm | Blake2b |
| Bitmain | Manufacturer | Obelisk |
Profitability Comparison
Bitmain Antminer A3 (815Gh)
Obelisk SC1 Immersion
Based on BTC price of $74,178 and current network difficulty as of Mar 16, 2026. Actual results vary.
Verdict
Based on specs, the Obelisk SC1 Immersion offers 54% better efficiency at 727.3 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
Obelisk SC1 Immersion727.3 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer A3 (815Gh) or Obelisk SC1 Immersion 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 $-3.77/day for the Obelisk SC1 Immersion. 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 Obelisk SC1 Immersion?
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 Obelisk SC1 Immersion?
The Bitmain Antminer A3 (815Gh) scores 31/100 on our Home Mining Score (vs 28/100 for the Obelisk SC1 Immersion). 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 Obelisk SC1 Immersion?
The Bitmain Antminer A3 (815Gh) runs at 1,564.4 J/TH while the Obelisk SC1 Immersion runs at 727.3 J/TH — a difference of 837.2 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.