Using asm1064 main control chip, the transmission speed is fast and stable. Led monitoring indicator, the blue light is always on when it is inserted into the hard disk drive, and the blue light flashes when reading data, which can monitor the working state of the hard disk at any time. Support hot swap and hot swap, compatible with sata6g, 3G and 1.5g hard disk drives. It conforms to serial ATA 3.0 specification and is downward compatible with sata2.0 and sata1.0. It conforms to PCI Express V3.0 specification and is downward compatible with PCI Express v2.0 1.0. Support 6.0 Gbps, 3.0 Gbps and 1.5 Gbps of communication speed Support Gen 1I, Gen 1X, Gen 2I, Gen 2m, Gen 2x, and Gen 3I Supports 4 SATA Support ahci1.0 mode Support native command queue (NCQ) Support FIS switch or command switching based on port multiplier. Support hot swap and hot swap. Sata6g, 3G and 1.5g compatible hard drives Bus interface: PCI Express X1 slot Expansion interface: 4 sata3.0 interfaces System requirements: a PCI Express X1 slot is available, and PCI-E x2 X4 X8 x16 is supported; when PCI-E x2 * 4 X8 x16 is supported, PCI Express X1 slot can be used. Interface: PCI-e 1x (compatible with 1X, 4x, 8x, 16x) Interface speed: 6Gbps Main control chip: asm1064 Color: As Shown Material: PVC + Copper + Iron Package Contents: 1 x 4-port SATA III PCIe expansion card 1 x half-height bracket