1. The switching capabilities of the SE-M8747A-4MK PCI Express3.0 x8 M.2 NVMe SSD adapter card enable users to connect multiple hosts to their respective endpoints via a scalable, high-bandwidth, non-blocking interconnect to communicate with Connect applications including servers, storage, communications and graphics platforms. 2. The enhanced version of 8747 is field tested and is ideal for fan-out, aggregation and peer-to-peer traffic modes. 3. PCI Express3.0 x8 bus architecture allows users to configure the device in single host mode or multi-host mode in the old version, 4.Has four M.2 host ports supporting 1+1 (one active and one backup) or N+1 (N active and one backup) host failover with powerful architecture, 5. Enhancements enable users to build PCIe-based systems for high availability, failover, redundancy or clustering systems. Description: 1. Compliant with PCI Express specification revision v3.0, backward compatible with PCIe 2.0, PCIe 1.0 and PCIe1.0a 2.PCI Power Management Specification Revision 1.2 3. Each supports 2.5Gb: 250MB/s, 5Gb: 500MB/s and 8Gb: 1GB/s transmission rate 4.Bus interface: PCI Express 3.0 X16 5. Support (NVMe), M.2 specification revision 0.9 6.Support 4-port x8 channel M.2 Key M NVMe SSD device 7.Support M.2 SSD module size: 2230, 2242, 2260, 2280, 22110 8.Support M.2 "M" key via PCIe protocol 9.LED read/write indicator light 10.Onboard active cooling fan 11. Automatically detect channel configuration at startup 12. All ports support hot swapping 13. Working temperature range: 0~85C System Requirements Win7/Win8/Win8.1/Win10 32 or 64bit, Linux-kernel3.17 or higher, 1 available PCI Express x16 slot Material: PCB+metal Color: As shown Package Contents: 1 x PCIe x8 Quad M.2 NVMe SSD Adapter PEX8747 Expansion Card 4 x Screws 1 x Screwdriver 1 x Radiator Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use 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.