Pacific Digital Talon ZL-2 Serial ATA Queuing RAID Controller 2-Port (U-30244) HW Queuing fully enables SATA drives, increases read/write speed. Support up to 2 SATA-1 drives Specifically designed to maximize the TCQ features of 10,000 RPM drives like the WD Raptor Operates at maximum 32bit speed in 33 or 66MHz bus. On-board Automatic DMA state machine for true hardware multi-tasking