Complex sentence: Thus, PCI Express was selected by the designers of SATA interface, as part of the SATA 3.2 revision; extending the SATA specification to also provide a PCI Express interface within the same connector allowed much faster speeds by reusing already existing technology.
Split into simpler sentences: Thus, PCI Express was selected by the designers of SATA interface, as the basis for the SATA 3.2 revision. As further benefits, changing the SATA specification to also provide a PCI Express interface within the same connector allowed much faster speeds by reusing already existing technology.