Compliant with PCI-Experss,Compliance with Serial Specification 3.0 Bus Type of PCI Express X4 3.0 interface The supported communication rates are 6.0Gbps Self-identified 8 ports, no need to drive Hot swap and heat exchange Itemname: PCIE 4X to Card Interface: PCI-E 4X (The signal is actually 2x, and the interface is 4x) Interface rate: 6Gbps Main control chip: ASM1166 + JMB5xx System support: for 8/10/11, Linux OS. Color: Black Material: PCB+Metal Package Contents: 1 x PCIE 8 Port 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.