I have two Seagate 6TB drives connected to two of the six SATA ports on this Z170 Gigabyte motherboard ("SATA3 0/1/2/3/4/5 (SATA 6Gb/s Connectors)" according to the motherboard manual).
HWiNFO64 is reporting one of them as "Serial ATA 6Gb/s @ 3Gb/s" and the other as "Serial ATA 6Gb/s @ 6Gb/s"...
