Features: PCIE X16 slot splits 2 PCIEX8 (physical slot X16) to use SATA Power version. Requires motherboards BI0S support to change the PCIE operating of the corresponding slot to X8X8. Requires motherboards BI0S setups to change the PCIE connection speed of the corresponding slot. Metal shielded case for use with PCIE extension cable.With LED indicators. 40.4mm space slot Support installing 2 PCIE cards, support Graphics card, networking card, passthrough card, capture card, etc., and work at PCIEX8 performances Specifications: Item: PCIE X16 Slot Splits 2 PCIEX8 Card Power： Sata Size：about 12.3x9cm/4.84x3.54in Package Includes: 1PCS PCIE X16 to 2 PCIEX8 Splits Card note: Due to the problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurment.