Bought to replace a hard drive laptop Windows 8.1, the PC boots faster than in standard mode Quick Start mode (click "Power Buttons", then "Settings" and then "Change Parameters not available") in which it was initially positioned: Month 10 to 15s to be on the Windows desktop, instead of 30s to 40s with the hard drive in 7200 / min! The "Standard" mode is preferable to the mode "Quick Start" as it troom leads directly to the "safe mode F8" and the choice of boot (CD / USB / SSD) with F12: it is convenient in case of problems. The PC is very responsive especially at the start of the big image processing software and games. The Samsung Magician software does its job, the Quick mode (using some RAM memory time virtual disk) passed the Reading debits / Writing 540Mo / s / 500MB / s 4600Mo / s / 3700Mo / s. By cons I do not know whether it shows the use of the PC! I takes only four stars because the Samsung Data Migration software never wanted to install on the PC, but it is not a problem because I use ACRONIS instead. The SSD itself deserves the 5 stars.