SABRENT ST-PX2T Serial ATA II 3Gbps 4-Port PCI Express RAID & SATA II Host Controller Card **REQUIRES available PCI EXPRESS slot on the motherboard*** Add Advanced features of SATA II RAID 0 and RAID 1 to your computer. PCI Express is the new standard that will replace PCI. The new PCI Express interface effectively quadruples the amount of available computing bandwidth, resulting in faster music downloads, smoother streaming video, and lightning fast access to mass storage devices. The SATA II RAID 2-channel PCI Express Card offers the perfect solution for users who want to add Serial ATA II ports to their computers. The Card is designed to take advantage of the additional bandwidth and features provided by the new PCI Express I/O interconnection standard. Installing the PCI Express Card now will give you device-upgrade expansion room for many years to come. Specifications: 2 External SATA II (Serial ATA) Connectors & 2 Internal SATA II (SATA) Connectors 48 bits LBA can Break Capacity-Limit to Support HDD larger than 137GB Supports 1-lane 2.5Gbps PCI Express Provides RAID 0 (Striping), RAID 1 (Mirroring) Provides 2 x dual Serial ATA channels (up to 4 drives) Co-resides with motherboard IDE devices Supports SATA II transfer rate of 3.0Gbps Support co-exist RAID set and Non-RAID HDD Allow HDDs with different sizes to be configured in a RAID set Independent Link, Transport, and data FIFO Independent command fetch, scatter/gather, and command execution Provides RAID 0 (Stripping) to greatly increase the performance of data transfer by simultaneously writing data to multiple drives Provides RAID 1 (Mirroring) to protect the data from a disk failure by writing identical data on 2 drives to provide both the performance enhancements that come from Striping and the data availability and integrity that comes from Mirroring Requirements: Microsoft Windows 2000, XP and 2003 Server PCI Express Slot available