My issue is my motherboard runs Sata II ports and all the latest SSDs are Sata III. From my knowledge I believe Sata III devices can still be runned by Sata II ports however they are limited by speed. Therefore my real issue is that I want a Samsung ssd. It can be one of three; 750 EVO, 850 EVO or 850 PRO. Now obviously it would be obvious to go for the 850 pro if i had sata III but I don't . Am worried that if I get 850 pro on sata II I will possibility get the same speed/performance that I would get with 750 EVO on sata II. Someone please help me with this, I don't want to be using more money then I need too with my current setup. :/