For office PCs with PCI EXPRESS connector. Allows you to add 4 SATA ports to connect 1 to 4 SATA III devices independently. Supports hard drives, optical drives, SSDs and port multiplier devices.Compatibility: SATA 3 (backward compatible with SATA 1 and 2). Driver "in box" (installation without CD) for Windows 11-10, Win8, Win7, Vista, 2008, 2012, Linux, Mac 10.x and above. Features: PCI EXPRESS 2x compatible PCIe 3.0 connector (compatible with 2x, 4x, 8x and 16x). PCIe 4.0, 3.0 and 2.0 compatible.4 independent SATA ports without limiting drive capacity. SATA 3.2 support Supports transfer rates of 6.0Gbps, 3.0Gbps, 1.5Gbps. Compatible with devices of type "Port Multiplier", HDD, SSD, CDROM, Blu-Ray etc. ATA and ATAPI support. AHCI SPEC 1.4-COMPATIBLE. UEFI (Unified Extensible Firmware Interface) compliant NCQ compliant. Hot-plug support.Ports for drive activity LEDs.CHIPSET ASM1164. UEFI & Legacy Boot ROM combo that allows booting from Windows or Linux to UEFI and legacy bios. Veneered with low and high profile squares.