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Green PCB card with silver PCIe x1 edge connector and black Oculink SFF-8612 port

LetLinkSo

LetLinkSo LLS-CD-1PC1OC-03 PCIe 4.0 x1 to Oculink SFF-8612 Adapter

SKU CH-C76R-T6CEP

Adds an Oculink SFF-8612 x4 port via a PCIe 4.0 x1 slot for NVMe SSDs or eGPUs at 16 GT/s per lane

  • Supported standardsPCIe 4.0
  • Transfer speed16GT/s (per lane)
  • Supported operating systemsWindows,Windows Server and Linux
  • Product typePCIe to Oculink Adapter
  • Compatible withPCIe 4.0
  • DetailsPCIe x1 to 1-port Oculink

Adapter Type PCIe x1 to 1-Port Oculink / External

  • Add Oculink SFF-8612 x4 connectivity via PCIe x1 slot
  • 16 GT/s per lane transfer rate with PCIe 4.0 standard
  • Welded connector housing for secure and durable connection
  • Supports bootable NVMe devices for system startup flexibility
  • Driver-free operation on Windows Server and Linux

PCIe 4.0 x1 to Oculink SFF-8612 Adapter

This adapter adds an Oculink SFF-8612 x4 interface through a PCIe x1 slot. It targets builders connecting NVMe SSDs or eGPU docks using an SFF-8611 cable. Systems must run Windows, Windows Server or Linux. The card fits a single expansion slot and requires no extra drivers.

Sustained transfer behaviour

The link operates at the PCIe 4.0 standard with a 16 GT/s per lane rate across the x1 electrical connection. Real-world throughput is limited by the single lane rather than the x4 Oculink receptacle. Heavy sequential workloads will saturate the upstream lane before the downstream port reaches its nominal ceiling. Thermal output remains low because the board draws minimal power.

Installation notes

Insert the card into any free PCIe x1 slot and attach the SFF-8611 cable to the SFF-8612 port. The welded connector housing resists damage during repeated mating cycles. Boot support is included, but the host BIOS must expose the slot in PCIe or NVMe mode; some platforms require forcing Gen 3 and a cold restart. Buyers without a PCIe slot cannot use this adapter.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 70% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameLetLinkSo
Product linePCIe to Oculink Card
Model nameLLS-CD-1PC1OC-03
Product typePCIe to Oculink Adapter
Performance
Transfer speed16GT/s (per lane)
Connectivity
Supported standardsPCIe 4.0
Size & build
Product weight1 lb (0.45 kg)
Compatibility
Supported operating systemsWindows,Windows Server and Linux
Compatible withPCIe 4.0
In the box
In the box1 x PCIe x1 to 1-port Oculink Adapter

Other versions of this model

4 more in the same range

Questions about this item

Does the PCIe 4.0 x1 link add noticeable heat or power draw when the Oculink SFF-8612 port runs all day?

The adapter itself is passive and draws minimal power; sustained heat depends on the attached NVMe drive or eGPU rather than the card.

What must I already own to connect an NVMe SSD or eGPU through the SFF-8612 port?

You need an Oculink SFF-8611 cable and a compatible NVMe SSD or eGPU enclosure with an SFF-8611 input.

Will this card work in an older PCIe 3.0 x1 slot on my current motherboard?

Yes, it is backward compatible and will operate at PCIe 3.0 speeds when installed in a PCIe 3.0 x1 slot.

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