No, just one single Hard Disk couldn't thoroughly use SATA III bandwidth, for the reason that most hard disks crafting bandwidth could not be higher than 150MB/s, and looking through bandwidth could not be higher than 300MB/s, so the SATA III 6Gb/s=6000Mb/s=6000/8MBps=750Bps could not be totally applied. Female SATA ports https://livebackpage.com/story175317/the-5-second-trick-for-sata-iii-hard-disk