HOOCCC PCIe 4.0 x4 to OCuLink SFF-8612 Adapter Card, Gen4 External GPU eGPU Expansion Board with Full & Low Profile Brackets, Compatible with SFF-8611 Cable, Backward Compatible with PCIe 3.0 P3C

HOOCCC PCIe 4.0 x4 to OCuLink SFF-8612 Adapter Card Expand Your Desktop with External PCIe Capability

Unlock high-speed external connectivity for your desktop or small-form-factor PC with the HOOCCC PCIe to OCuLink adapter. Designed for enthusiasts, eGPU users, and professionals who need to connect external PCIe devices, this card converts an internal motherboard PCIe slot into a standard OCuLink SFF-8612 interface, delivering full PCIe 4.0 x4 Gen4 bandwidth in a compact, reliable package.

Blazing-Fast PCIe 4.0 x4 Performance

Experience maximum throughput with PCIe 4.0 x4 (Gen4) signaling, while maintaining full backward compatibility with PCIe 3.0 x4 (Gen3) systems. The card functions seamlessly in any open motherboard PCIe x4, x8, or x16 physical slot (running at x4 electrical speed), making it a versatile upgrade for modern and legacy builds alike.

Standard OCuLink SFF-8612 Connectivity

The integrated OCuLink female port (SFF-8612 specification) is compatible with standard SFF-8611 data cables, allowing you to link external GPU docks, high-speed NVMe SSD enclosures, capture cards, and other PCIe-based peripherals. Please note: the OCuLink port provides 3.3V power output only and does not supply 12V power; connected devices requiring 12V must be powered independently through their own enclosure or power supply.

Flexible Installation with Dual Profile Brackets

Whether youre working with a full-size ATX tower or a slim low-profile case, this adapter has you covered. Both a full-height bracket (120 mm) and a low-profile bracket (80 mm) are included, ensuring a secure fit in virtually any chassis. The PCB measures approximately 79 mm (L) × 41 mm (H) for easy handling and clearance.

Premium Build for Signal Integrity & Longevity

Gold-plated PCIe gold fingers using an electroplating and immersion gold process resist wear from repeated insertion cycles and maintain stable contact over time. Combined with automated multi-zone reflow soldering (SMT) and precision temperature control during manufacturing, the board delivers military-grade reliability and zero loss of high-frequency signals.

Important Installation Guidelines

For safety and to protect your hardware, neither the PCIe bus nor the OCuLink interface supports hot-plugging. Always shut down your computer, switch off the power supply, and disconnect AC power before installing or removing this card or any attached OCuLink cable.

Package Includes:

1. HOOCCC PCIe 4.0 x4 to OCuLink SFF-8612 Adapter Card
2. Full-profile bracket (pre-installed)
3. Low-profile / half-height bracket

Add the HOOCCC OCuLink adapter to your build today and bridge the gap between internal PCIe expansion and the growing ecosystem of external high-performance devices.