PCI-E X4 interface 0 can be easily expanded as long as the motherboard has PCI Express X4/ x8/X16 slots, plug and play, convenient and fast. The thick gold-plated gold finger adopts the immersion gold process, which has good conductivity, , good contact, and improves data transmission rate. High-quality PCB board uses high-quality PCB board, high temperature resistance, cold resistance, long-term use without deformation, so as to long-term stability. PCIE X4 one for six PCIE X4 interface to USB interface (USB devices are not supported) Applicable system: XP/Win7 /Win8/Win8.1Win10, etc. Product name: PCI-E X1 one with four Applicable slots: PCI-E X4/X8/X16 Bus bandwidth: about 8Gb/s Product size: 120MM x 115MM x 83MM Working environment: 0-70 Colour: green + black Material: PCB Package Contents: 1 * Expansion Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.