HOOCCC GPU DOCK OCuLink eGPU Dock Motherboard Dock Station PCIe 4.0 x4, SFF-8612 to PCIe x16 Riser Card for External Graphics Card, ATX/Dual Power Supply, 64Gbps High-Speed Adapter for Mini PC/Laptop

HOOCCC OCuLink SFF-8612 to PCIe 4.0 x4 GPU Dock Motherboard (Bare Board / PCBA)

=== OVERVIEW ===

This is a compact OCuLink GPU dock motherboard (bare PCBA, no enclosure, no PSU, no cable included). It converts an OCuLink SFF-8612 host port into a standard PCIe x16 physical slot (electrical x4) for external GPU (eGPU), mining card, or NVMe PCIe device expansion. Supports PCIe 4.0 x4 up to 64Gbps when paired with a full-pin OCuLink cable and a compatible host (mini PC, laptop, or motherboard with SFF-8611/8612 header).

=== KEY FEATURES ===

1. Interface: SFF-8612 OCuLink input to PCIe x16 slot (x4 electrical), PCIe 4.0 compliant, backward compatible with PCIe 3.0
2. Bandwidth: Up to 64Gbps (PCIe 4.0 x4)
3. Power Input (select ONE only): 24-Pin ATX (recommended for GPU load) / GPU 6-Pin passthrough / DC 12V 10A (2.5mm barrel)
4. Startup Control: SW1/SW2/SW3 DIP switches for clock delay, reset delay, power mode; J1/J2 jumpers for host-sync or forced independent boot
5. Status LEDs: 3.3V, 12V, CLK, RST monitoring (green = normal, red = fault)
6. PCB: 4-layer low-impedance, onboard DCDC 12V to 3.3V/3A
7. Size: 138 x 46 mm, mount holes 95 mm / 103 mm spacing
8. Extra ports: 12V fan header, USB header

=== SPECIFICATIONS ===

Model: OCuLink GPU Dock Motherboard

Host Side: OCuLink SFF-8612 (requires full-pin SFF-8611 cable to host)

Device Side: PCIe x16 physical (x4 lanes)

Protocol: PCIe 4.0 x4 (64Gbps max)

Power: 24Pin ATX / 6Pin GPU / DC 12V 10A (single source only)

Board Dim: 138 x 46 mm

PCB: 4-layer

=== IMPORTANT NOTES (READ BEFORE BUYING) ===

1. Motherboard only: No case, no fan, no power supply, no OCuLink cable in package.
2. Cable requirement: Must use a FULL-PIN OCuLink (SFF-8611/SFF-8612) cable. Reduced-pin or custom OCuLink cables may fail to deliver sideband/reset signals.
3. Power rule: NEVER connect two power sources at the same time. ATX 24Pin is suggested for GPUs above 75W.
4. Compatibility: Host BIOS must support PCIe hotplug/eGPU init via OCuLink. Some laptops need ACPI/Bios tweak.
5. Boot order tip: Power on dock board first, then host.

=== PACKAGE CONTENTS ===

1 x OCuLink to PCIe x4 GPU Dock Motherboard (as pictured)