The Adaptec SCSI Card 39320D-R is a 64-bit 133 MHz PCI-X, dual-channel Ultra320 SCSI card with integrated HostRAID? RAID 0, 1 optimized for internal connections. The 39320-R is a cost effective hardware based RAID, a better alternative to software based RAID in the market today. It provides worry-free data protection at the fastest SCSI speeds available up to 640 MBps ideal for mainline storage, streaming video and audio, and other bandwidth-intensive applications. The card has a 68-pin HD external connector and two 68-pin HD internal connector for Ultra320 SCSI (LVD) hard disks drives. The 39320-R offers an unparalleled degree of investment protection and upgradability to Adaptec`s entire SCSI RAID family of products.