The Samsung PM1643 SSDs will come in a 2.5-inch form factor, but at 15mm. The new drives support configurable run-time power consumption options of 9W ~ 13.5W (the lower consumption means lower performance), which allows to choose between power and performance per system and application. Since the drives consume an exact same amount of power as the PM1633a 15.36 TB, it is drop in compatible with systems that use the PM1633-series drives. Furthermore, GB-per-Watt consumption of the new drives is at least two times lower when compared to the PM1633a 15.36 TB model.