The Rocket 620 Host Adapter is the industry first PCI-Express 2.0 x1 host adapters that deliver 500MB/s throughput. The Rocket 620 has 2 independent 6Gb/s connectors for internal connectivity. It is ideal for those who need fast efficient and reliable storage for their PC system. PCI-Express 2.0 x1 (Compatible with PCI-Express 1.0). 600MB/s per port. Industry Standard AHCI Compliant. Plug-n-Play Ready. Out-of-the-Box Ready for Windows Linux and Mac OSX (Check AHCI detail OS support list). Hot Plug. Compatible with SATA HDD Optical Drives SSD etc. Power Efficient. Going Green Saves Green!