I'm about to upgrade my MBP mid 2012 with two SSD drives instead of the stock HDD and optical disc drive. I read on different forums that the optical drive link with the motherboard is only SATA 2 and that this will eventually cause problems with a SATA 3 SSD.
I, however, see lots of videos and articles where the optical disc drive is substituted for an SSD. Are those new SSDs SATA 2 or is this not an actual issue (with the bandwidth)?
Can I use a SATA 3 SSD instead of the optical drive? Can I "switch down" a SATA 3 drive to SATA 2? Or do I need to find a SATA 2 SSD to use in the optical drive?
I specifically want to instal two Samsung EVO 850 500 GB in my old MBP.