I have a Intel 840 Evo 500GB and it is very good drive. But sometimes not working (not booting) on my ultrabook. The bios is detect device but not detect partitions. I don't understand this problems causes. Please help me.
This is not an Intel product. 840 EVO is from Samsung. I would suggest you to see if the bios of your computer has an option called "fast boot" in the boot menu and disable it, and if it doesn't work, search for bios updates to the ultrabook and firmware updates to the SSD drive.