This 2 Port IDE (Ultra ATA/133) Controller Card can be installed in a PCI slot, to add more IDE storage capability to your PC. Providing two IDE drive ports with support for data transfer rates of up to 133 MBps, this adapter card can act as the primary boot device and replace built-in IDE ports, or provide 2 additional high-speed ports to the system. Designed to perform with high-speed IDE/133 drives, the adapter card also supports 100 MBps hard drives, 66 MBps hard drives, 33 MBps hard drives, CD-ROMS, CDRW drives, and other ATA peripherals. To ensure hassle-free installation, the IDE Controller Card includes Bus-Master drivers for DOS, Windows 98/ME/NT 4/2000/XP and Vista(tm).