1、PROFESSIONAL DESIGN: PCI Express 4X riser card for high frequency impedance PCB board design. High accuracy machine soldered 4 layer PCB with gold plating for stable transmission. No jumper setting. No driver software program required. 2、SUPERIOR PERFORMANCE: PCI Express 4X riser card has the best conductivity and excellent electrical performance. Resistance to plucking and plugging. Ensure the signal is stable at full speed without attenuation. 3、WIDELY APPLICABLE: PCI Express 4X riser card 90 degree adapter card is best suited for graphic design, gaming or watching videos. No dropped frames at all. 4、USEFUL ACCESSORIES: The PCI Express 4X Riser Card keeps the PCI Express card away from the motherboard and the PCI Express sockets directly aligned with the sockets on the motherboard. It is a right angle lifting board for the PCI Express X4 bus. 5、INSTALLATION: The connectors are soldered to the component side (B side) of the board. When the I O board is inserted, the component side of the I O board will face down toward the motherboard. 6、COMPATIBILITY: The PCI Express 4X Riser card does not support hot swapping. PCIE devices can be freely installed according to the location and size of 1U and 2U servers.