It featured a capacity of 37 GB on a single platter, a Serial ATA interface, and was the first ATA drive to operate at a spindle speed of 10,000 rpm. Like many early SATA drives, the Raptor was not a "real" SATA drive because it was really a PATA drive that used an 88i8030C interface bridge chip from Marvell. However, this fact did not significantly hamper the Raptor's performance. WD360GD Raptors do not use the 3.3 V Serial ATA power line. There is no need to use a SATA power connector as it will not be fully utilized.