About the technical data needs to be spoken here probably not much. I have the EVO 850 of 840 preferred because it is more recent and has cost just over and a longer warranty offered (5 years). The SSD can be installed very quickly and use. You should install the software especially the Samsung Magician and necessarily select the operating system for using SSDs to optimize there after installation in the left menu "OS Optimization"! Here, Windows services, ... adapted to the SSD is not defragmented permanently and so on. Not doing this, so the SSD keeps just not for as long as desired. As I said, the software is included. I am very pleased with this as far as fast and quality SSD!