Features: Built-in high-performance main control chip, low power consumption, fast response. Thickened gold finger design, good electrical conductivity, oxidation-resistant, improving data transmission speed. Adopt high-quality PCB board, high/low temperature resistant, strong anti-interference performance, not easy to deform, to ensure stability. Compatible with PCI-E X4/X8/X16 slot. The USB3.0 interfaces only support graphics card extension cable, not support U disk, mobile hard disk and other storage devices. Specification: Type: PCI-E X4 adapter card Applicable slot: PCI-E X4/X8/X16 BUS bandwidth: About 8Gb/s Supported system: Windows XP/Win7/Win8/Win10, etc. Working temperature: 0-70 Item size: 12 * 8.1 * 6.1cm /4.72 * 3.19 * 2.4in Packing list: 1 * Adapter card 2 * Baffle 1 * Screwdriver 1 * Bag of screws