Is it possible to combine soldered and removable RAM?

Question

laptops

Hello. I have a laptop (ASUS R556LJ-XO165) with an Intel® Core™ i7-5500U @ 2.40GHz. On board Windows 10 64bit. It has 4GB of RAM (soldered on the motherboard). Screen Speccy64

For work, I decided to expand the RAM to 8GB. There is only one slot, I installed a SoDIMM DDR3 4GB 1600 MHz Nanya (NT4GC64B8HG0NS-DI) chip. Now Speccy64 shows that there are 2 slots (although in fact 1) of which 1 slot is occupied for this plate.

As a result, the same 4GB comes out, but now the removable plate works ... Or I don’t understand something ... One way or another, Windows shows 4GB with and without a plate.
Is it possible to combine soldered RAM and removable RAM in order to get 8GB? Or will they not work at the same time and will you have to look for an 8GB plate?

Answer 1

The laptop uses a DDR3L memory type, which has a supply voltage of 1.35 V (the letter L just stands for this), against your DDR3 (NT4GC64B8HG0NS-DI), which has a supply of 1.5 V.
Together, such a tandem will not start.