Bitmain Antminer A3 Blake2B official reference
Official Antminer A3 Blake2B reference: 815 GH/s, 1,275 W and 1.56 J/GH, with exact external-PSU, fan-conflict, recovery and EOS boundaries.
Quick answer
The Bitmain Antminer A3 Blake2B official reference is a Blake2b miner rated about 815 GH/s at roughly 1,275 W.
Full Specifications
| Model | Bitmain Antminer A3 Blake2B official reference |
|---|---|
| Model Number | Antminer A3 |
| Manufacturer | Bitmain |
| Algorithm | Blake2b |
| Coins Mined | Unknown |
| Hashrate | 815 GH/s |
| Power Consumption | 1,275 W |
| Efficiency | 1.56 J/GH |
| Noise Level | 76 dB |
| Chip Count | 180 |
| Cooling | Air |
| Voltage Range | 11.6-13.0 V DC miner input; 10 PCIe; external APW3/APW5/APW7; facility mains unresolved |
| Operating Temperature | 5 C to 35 C |
| Dimensions | 321 x 125 x 208 mm |
| Weight | 4.2 kg net |
| Status | OEM EOS reference |
Evidence-controlled Antminer A3 reference: Bitmain publishes one Blake2B performance lane in native GH/s and J/GH units.
| Hashrate | Power consumption | Efficiency | Frequency |
|---|---|---|---|
| 815 GH/s | 1,275 W +7% | 1.56 J/GH +7% | 600 MHz |
Bitmain’s maintained algorithm roster associates A3 with Siacoin Classic (SCC) and Space Cash (XSC). This page does not treat historical pool endpoints as current pool advice and does not compare unlike algorithms.
Hardware, cooling, and environment
| Hashboards / chips | 3 / 180 total |
|---|---|
| Miner-side PCIe connectors | 10 |
| Fans | Two 12038 fans; 12 V / 2.4 A; 209.8 CFM |
| Operating temperature | 5–35°C |
| Humidity | ≤65% |
| Published temperature ceilings | 85°C PCB; 115°C chip |
| Sound | 76 dB |
| Miner dimensions / net weight | 321 × 125 × 208 mm / 4.2 kg |
| Packaged dimensions / gross weight | 435 × 215 × 325 mm / 4.90 kg |
Fan-source conflict: the exact A3 specification prints 6,000 RPM for both front and rear fans. Bitmain’s later general fan roster prints 6,000 RPM front and 4,500 RPM rear. This page does not choose a rear-fan speed; confirm the installed fan label and exact replacement requirements before service.
External-PSU electrical boundary
The A3 accepts 11.6–13 VDC through 10 miner-side PCIe connectors. Bitmain’s PSU roster lists APW3, APW5, and APW7 families for A3. Those facts describe the miner-side DC boundary and a family roster; they do not establish the input rating of any particular PSU revision.
Facility AC voltage, current, frequency, cord, connector, circuit protection, and grounding remain unresolved. A qualified person must inspect the exact PSU nameplate and revision and verify the entire installation before energizing it. Do not infer cross-model PSU or parts interchangeability from a family name.
Firmware, recovery, diagnostics, and end of service
- Select A3 and the exact revision in Bitmain’s firmware selector; do not cross-flash another model.
- Open Bitmain’s A3 support page.
- Follow Bitmain’s miner security workflow.
- Use the recovery procedure linked by Bitmain for the A3 series; verify the exact model before writing media.
- Use Bitmain’s general diagnostic workflow.
- Organize symptoms and logs; request repair triage; open the A3 service router.
End of service: Bitmain’s current consolidated roster dates the A3 group to May 9, 2020, while an older notification prints May 10, 2020. The durable conclusion is that A3 reached end of service in May 2020; this page does not imply continuing manufacturer repair coverage.
No architecture, Bitcoin-mining, economics, residential-use, heat-use, tuning, compatibility, or parts-interchangeability claim is asserted. Primary source: Bitmain A3 Specifications. Reviewed August 28, 2026.