Moving from 8 GB to 16 GB won't necessarily make your system faster, unless you routinely ran out of RAM which caused swapping to disk. If 8 GB was already adequate for the type of tasks you perform on your laptop, then adding more won't make a noticeable impact on speed. Do you have a hard disk drive or an SSD? If it's a hard drive, replacing it with an SSD will make it much faster and more responsive, a noticeable difference and the most bang-for-your-buck that you can get for any upgrade. 
[URL]    tried upgrading my 5580 I5 using the crucial ram in the above photo the hynix ram is what’s currently in the laptop  The laptop with 16gb of new memory is no faster than before    going from 8gb to 16gb should be quicker?right not the same    Latest bios is updated  Conflicts > [URL]        
Ram upgrade issues latitude 5580