Features: PCIe X8 port, supports splitting into 2-port Oculink SFF8611 and 8612 expansion card enhances data transmission efficiency. Strong compatibility, easy to install, supports multiple device connection, provides stable signal transmission and low latency. Mainboard needs to support PCIE X4X4 split Support SFF-8611&8612 to SFF-8639U.2SSD, support external SFF-8611& 8612 OCulink devices. Uplinked PCle Gen4x8 with 128Gbps bandwidth, downlink PCle Gen4x4x2Port with 32Gbps x2Port bandwidth. Supports PCIe4.0, backward compatibles PCIe3.0 & PCIe2.0. For data centre administrators and enthusiasts who need efficient data processing. Specifications: Item：PCIe X8 to 2 port SFF8611&8612 Oculink Expansion Card Size:about 98X120MM/3.86x4.72in Support PCIE X4X4 Split Support SFF-8611&8612 to SFF-8639U.2SSD Support external SFF-8611& 8612 OCulink devices Uplinked PCle Gen4x8 with 128Gbps bandwidth Downlink PCle Gen4x4x2Port with 32Gbpsx2Port bandwidth Package Includes: 1PC PCIe X8 to 2 port SFF8611&8612 Expansion Card note: Due to the problem of lighting effect, there might be tolerances in product, please understand. Please allow 1cm errors due to measurement.