Update, I got the port working by using a programmer to erase the Bios chip and upload the previous version of Bios. All good now.
I sport 3 Samsung 860 SSDs now in it.
1 SSD in the drive bay, works at SATA 2 speed, 290MBs sustained read/write
2 SSDs in the Sata 3 ports,in RAID 0 in Windows, I...