ULTRA ATA 133 PCI ROHS 2CH This high-speed dual channel Ultra ATA/133 bus master host controller for PC works with various brands of Ultra ATA 133/100/66/33 hard disk drives and ATAPI devices including CD/ROM and CD-R/RW drives, DVD-ROM and zip drives. It detects automatically drive types and fine tunes to the best performance for each Ultra ATA drive.