Antminer L3 family owner hub: L3+ and L3++ evidence boundaries

Antminer L3 family identification: L3+ and L3++ are separate Scrypt models. Confirm the complete nameplate suffix before choosing specifications, firmware, a control-board procedure, PSU assumptions, or repair parts.

Canonical model	OEM-supported lane	Key boundary	Reference
Antminer L3+	504 MH/s; 800 W ±10%; 1.6 J/MH ±10%	384 M; front/rear fan speeds 4,200/3,600 RPM; 4.4 kg	L3+ reference
Antminer L3++	580 MH/s; 942 W ±10%	450 M; both fans 4,500 RPM; 4.7 kg; normalized efficiency withheld because the OEM fields conflict arithmetically	L3++ reference

Contained records: 600 and 596 MH/s

Do not use the existing 600 MH/s L3+ or 596 MH/s L3++ records as specification sources. Exact primary Bitmain evidence reviewed for this family does not establish the circulated 600 MH/s / 850 W / 1.42 J/MH or 596 MH/s / approximately 1,050 W / 1.76 J/MH triples. These are not added to either canonical matrix. Route a physical unit by its exact nameplate; do not infer an OEM bin from an observed tuned hashrate.

Electrical and PSU preflight

1. Photograph the miner, control-board, hashboard, PSU, connector, and cord labels. Record the full model suffix and every revision.
2. Treat 11.6–13.0 V in the miner specification as DC input from the PSU, not AC mains.
3. Bitmain’s roster lists APW3-series, APW5, and APW7 for L3+ and L3++, but verify the exact installed PSU nameplate. A roster check does not establish revision, connector, cord, or cross-model interchangeability.
4. For APW3+, Bitmain specifies 220 V operation, at least 205 V starting voltage, and a C13 cord rated at least 10 A and no longer than 1.5 m. For APW5 with one L3+, it permits 110 V with at least 100 V starting voltage. The guides say the cord is not included.
5. Have a qualified person verify supply voltage, circuit capacity, protection, conductors, connectors, cord, disconnecting means, and grounding before energizing.
6. Bitmain recommends one PSU per miner. Different PSUs may feed separate hashboards, but one hashboard must never be connected to multiple PSUs.

Firmware, security, controller, and hashrate routing

• Bitmain firmware selector: select the exact L3+ or L3++ identity and installed control-board revision; read the complete package description.
• Official L3+ support hub: current setup, reset, upgrade, and support routes.
• Security firmware: signed L3+ security firmware disables SSH and cannot be downgraded to previous unsigned firmware.
• L3+ control-board troubleshooting: no IP, interrupted upgrade, missing hashboard or fan, and upgrade-failure paths.
• L3+ hashrate troubleshooting: isolate the PSU, controller, and boards under the exact stock procedure.
• Hashboard revision notice: old and new L3+ PCBAs and heatsinks differ. Select the installed version in a repair request; do not infer interchangeability.

Repair and comparison

• Request Antminer L3 repair diagnosis with exact labels, photos, logs, symptoms, and prior firmware actions.
• Compare Antminer L3+ and L7 using exact Scrypt units and supported OEM lanes.

Known boundaries: no unsupported 600 or 596 MH/s lane, generic tuning range, profitability or other economics, heat-reuse or residential-suitability recommendation, chip model, fabrication process, controller identity, or cross-model firmware, control-board, hashboard, PSU, connector, fan, or parts compatibility is asserted.

Primary evidence: the official L3+ and L3++ specifications, fan table, PSU roster, APW3+ and APW5 guides, firmware and security records, controller and hashrate troubleshooting, and hashboard-revision notice linked above. Reviewed August 28, 2026.