Serial ATA (SATA) is the latest generation of the ATA interface. SATA hard drives deliver blistering transfer speeds of up to 150MB/sec. Serial ATA uses long, thin cables, making it easier to connect your drive and improving the airflow inside your PC. If you are ready to move into the world of SATA, Promise has the controller solution for your needs. For a serial upgrade, the SATA150 TX4 controller offers four independent SATA ports for up to four Serial ATA/150 drives. With a SATA150 TX4 controller, you also get the benefit of Promise Technology's industry-leading ATA feature set. To assure faster transfers, Promise's ATA software uses sophisticated handling techniques to make data transfers more efficient and minimize overloading the host system CPU and slowing system response. Every Promise controller also supports drive capacities exceeding 137GB. Promise cards can be used on both 33MHz and 66MHz PCI bus motherboards for wider compatibility and improved performance.