When upgrading laptop memory you need to identify what type of DDR memory is used thus supported by your laptop. Failing to do this will mean a failed upgrade for a very simple reason - all versions of i7 16gb ram laptop DDR are incompatible with each other and use a different type of slot connector, which differs in the number of pins (and several other technical aspects).

Speaking of memory slots we need to introduce memory modules. In contrast to desktops your laptop uses a smaller form of memory slot that consumes less space. As a result, the memory modules used in laptops are smaller too. You may or may not have heard the term DIMM (Dual In-line Memory Module) before, especially if you've upgraded your desktop computer (now is a great time to jog your memory!). Laptops use SO-DIMM's - simply append 'Small Outline' to a DIMM. The name isn't very important except what this means in practise, namely you cannot install a DIMM in a SO-DIMM memory slot and vice versa. DIMM's are considerably longer than SO-DIMM's and are not designed for use in laptops. Before going further we should also point out that you may stumble upon SO-DIMM written as SODIMM - this is the exact same thing!