My question is whether the SATA controller on the motherboard is a SATA III interface; the tear down guide (which is great btw!) only mentions that the 2TB hard drive itself is SATA III. According to the Xbox One (original) tear down guide and this tear down guide, both the Xbox One and Xbox One S use the same south bridge; which would imply that the Xbox One S is only capable of SATA II speeds, regardless of the fact it holds a SATA III drive.