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Green PCB expansion card with four SFF-8643 ports and a PCIe x16 edge connector

Shenzhen Lianrui Information Technology

Shenzhen Lianrui Information Technology LRFC6941 4 Port SFF-8643 to PCIe x16 expansion card

SKU CH-32BW-6SFXK

Adds four PCIe x16 slots via SFF-8643 connectors with 12 V and 3.3 V power

  • TypeController Card
  • External USB Ports4 Port
  • Expands one host slot into four PCIe x16 slots
  • Four SFF-8643 connectors deliver 8-lane PCIe bandwidth each
  • SATA 4-pin and 15-pin power sockets supply 12 V and 3.3 V
  • Supports network, graphics and video cards in servers
  • Compact controller card adds flexible PCIe device expansion

LRFC6941 expansion card for servers

The LRFC6941 adapter connects a PCIe switch host card through four SFF-8643 Mini-SAS HD receptacles and presents four PCIe x16 slots. Each slot supports 8-lane PCI Express bandwidth for add-in cards. The board is designed for server and terminal-extension deployments that need dense PCIe expansion.

Power delivery and connector layout

A single SATA-style power socket accepts either a 12-pin or 15-pin plug and supplies both 12 V and 3.3 V rails to the attached devices. This dedicated power path keeps the expanded slots stable under load without drawing extra current from the host connector. The four SFF-8643 ports carry the upstream PCIe lanes to the switch card.

Mechanical fit and daily implications

The card occupies one PCIe x16 slot in the host system while exposing four full-length x16 slots for graphics, network or accelerator cards. Builders must ensure the chassis has enough physical space and airflow for the additional cards. No onboard controllers or firmware are included, so the host switch card handles all enumeration and bifurcation.

Highlights

  • Expands one host slot into four PCIe x16 slots
  • Four SFF-8643 connectors deliver 8-lane PCIe bandwidth each
  • SATA 4-pin and 15-pin power sockets supply 12 V and 3.3 V
  • Supports network, graphics and video cards in servers
  • Compact controller card adds flexible PCIe device expansion

Specifications

TypeController Card
External USB Ports4 Port

Questions about this item

Will the SATA 15-pin power connector need replacement after continuous server use?

The board draws 12 V and 3.3 V through a single SATA 15-pin connector; replace the cable if pins discolour or the latch fails.

Does the x16 slot run at full x16 electrical or drop to x8 under sustained load?

Each slot is specified for 8-lane PCI Express bandwidth, so the electrical link remains at x8 during sustained use.

How much heat does the LRFC6941 add when four cards run all day?

No active cooling is fitted; the adapter relies on chassis airflow, so ensure the server fans move enough air across the board.

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