Everyting was fine until I installed a second SSD. I had a Kingston 240 GB 300 with the operating system on it. Then I installed a second SSD - a Corsair Neutron GTX 240 GB. When it wasn't recognized, I tested it (both of them) on my laptop by connecting them via USB with a USB 3.0 to Sata Harddrive, (and both are recognized by the laptop (running windows 8).
I must have done something to my bios? I tried going to UEFI, etc. IDE, etc.
Also I have Paragon Hard Disk Manager 15 Pro and I've fixed the OS to UEFI.
I have a Gigabyte z87 D3HP-CF MoBo
16 GB of Corsair Vengeance 2100 Mhz RAm
My WD 1 TB HD WD10EADS is the only drive to be recognized.