This is the same as the PX-712A but with an SATA option.

PX-712SA Dual-Format DVD+/- SATA Drive Review

With the release of the PX-712A, Plextor also released the PX-712SA, which is the same drive with a SATA connection rather than IDE. Unlike the obvious benefits SATA brings to standard hard drives, this will not result in any performance gains since an optical drive is not capable of reaching the throughput needed to saturate the SATA channel. All this does is offer another option for connecting the drive to a system, reducing cable clutter and leaving the IDE ports open for other devices. The only requirement is your mainboard must have SATA support native to the chipset, meaning an add-on or secondary RAID controller will not work.