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Green circuit board with gold edge connector and silver OCuLink port, includes 120 mm and 80 mm metal brackets

HOOCCC

HOOCCC P3C PCIe 4.0 x4 to OCuLink SFF-8612 Adapter Card

SKU CH-S4N8-Y2VWS

Converts a PCIe 4.0 x4 slot into an OCuLink SFF-8612 port for external GPU or NVMe enclosures, includes 120 mm and 80 mm brackets, backward compatible with PCIe 3.0

  • TypePCI Express to Oculink
  • External Ports1 x Oculink Port
  • Internal PortsPCI-e

Bracket Type P3C+ Full-Height Bracket

  • P3C
  • P3C+ Full-Height Bracket
  • P3C+ Low-Profile Bracket

As versões riscadas existem, mas não estão disponíveis aqui.

  • PCIe 4.0 x4 bandwidth with backward compatibility to 3.0
  • OCuLink SFF-8612 port works with SFF-8611 cables for eGPU or NVMe enclosures
  • Full-height 120 mm and low-profile 80 mm brackets included for any chassis
  • Gold-plated contacts and SMT assembly ensure durable high-frequency signal integrity
  • 3 V power only via OCuLink; no hot-plug support — power off before install

What this adapter adds

The HOOCCC P3C turns an internal PCIe slot into an external OCuLink SFF-8612 port. It targets desktop owners who want to attach an eGPU dock, NVMe enclosure or other PCIe peripheral without opening the case again. Builders working in compact HTPC or server chassis also benefit from the included low-profile bracket. The card supplies 3.3 V only, so external devices must provide their own 12 V power.

The slot compatibility that matters

The adapter runs at PCIe 4.0 x4 Gen4 bandwidth and is backward compatible with PCIe 3.0 x4. It fits physically into any motherboard x4, x8 or x16 slot while operating electrically at x4. This single specification decides whether the card can saturate your external device; if your platform only offers x1 or x2 wiring, the link will negotiate down and limit throughput.

Capacity and headroom for external gear

One OCuLink SFF-8612 female port accepts standard SFF-8611 cables for a single external PCIe link. The 4.0 x4 lane budget comfortably handles modern GPUs and high-speed NVMe arrays at near-native speeds. Bandwidth runs out when the attached device demands more than four Gen4 lanes or when the host slot is wired for fewer lanes, making multi-device daisy-chains or dual-GPU setups unsuitable for this card.

Pontos fortes

  • PCIe 4.0 x4 bandwidth with backward compatibility to 3.0
  • OCuLink SFF-8612 port works with SFF-8611 cables for eGPU or NVMe enclosures
  • Full-height 120 mm and low-profile 80 mm brackets included for any chassis
  • Gold-plated contacts and SMT assembly ensure durable high-frequency signal integrity
  • 3 V power only via OCuLink; no hot-plug support — power off before install

Especificações

BrandHOOCCC
SeriesAdapter Card
ModelP3C
TypePCI Express to Oculink
External Ports1 x Oculink Port
Internal PortsPCI-e

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Perguntas sobre este artigo

What real-world throughput can I expect from the PCIe 4.0 x4 link once the card is installed?

The adapter passes through a full PCIe 4.0 x4 Gen4 connection, so an external GPU or NVMe enclosure sees the same lane width and signalling rate as an internal slot.

Which OCuLink standard does the port follow, and what cable type does it accept?

The female port is built to the SFF-8612 specification and mates with standard SFF-8611 data cables.

Will the included brackets let me mount this in a slim HTPC case?

Yes, both a 120 mm full-height bracket and an 80 mm low-profile bracket are supplied, covering ATX, micro-ATX and compact chassis.

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