1. Recommended for use with WIN 10 or above systems 2. The motherboard needs to support PCI-E3.0 to reach 900-1060M/S 3. 700-80OM/S under PCI-E2.0. The specific speed is related to the motherboard, hard disk box master control and SSD. 4. Different devices are different and cannot be generalized. 5. USB3.2 expansion card GEN2 10Gbps PCI-E 4X adapter card. Product interface:PCI-E 4X (the motherboard must support 4X8X16X slots Product rate:10Gbps Supported size:full height bezel/small chassis not supported Main control chip:ASM3142andVL822 main control System support:for WIN7 WIN1O WIN11 LINUX Note:You need to install the driver when using it on WIN7. And it's slower. Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use. Output interface:B:2 x TYPE-A and 3 x TYPE-C interface Colour:As Shown Material:PCB Package Contents: 1 x 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.