When creating your partitions allow 10% non allocates space for the SSD controller is for internal optimization. For the Windows optimization software, Samsung Magician, it is advisable to download it from the Samsung website, you will have the latest version. In the Samsung Magician software, once you have settled in RAPID try and activate the mode. Your reading rate, writing will make a great good, stay seated when you will see them. For my part on a pro version 840 of the 512 GB read transfer rate of 4614 MB / s and 3781 MB / s writing. Against 540 MB / s and 520 MB / S.