For DESKTOP PCs on PCI EXPRESS slot: adds 4 SATA ports (internal or external) to connect 1 to 4 SATA III peripherals independently. This latest-generation PCIe 3.1 card provides maximum throughput on SATA 6G. UEFI and AHCI support also guarantees compatibility with mechanical hard disks and SSDs. Compatibility: SATA 3 (backwards compatible with SATA 1 and 2). Drivers included for: Windows 7 (X86/X64), Windows 8/8.x / 10 (X86/X64). PCI EXPRESS 1x port compatible with PCIe 3.1a. 4 independent SATA ports without disk capacity limitation. SATA 3.2 support. Compatible with "Port Multiplier" type devices. AHCI SPEC 1.4 COMPATIBLE. UEFI COMPATIBLE (Unified Extensible Firmware Interface) NCQ compatible. Hot Plug support. ASM1064 CHIPSET. SUPPLIED WITH LOW AND HIGH PROFILE SQUARES.