Really having an issue with this one.

As others have mentioned, some machines may have supported both.

There’s an almost gaurantee that the board used only DDR3L. DDR4 wasn’t mass produced until mid 2016; a year later than this laptop.

The DDR4 slots look like the attachment joints were soldered after market, because they appear to have exposed copper or gold. Pretty certain the joints should be covered in tin solder.

What’s the story on this board/laptop? Are you a potential buyer?

Rule of thumb: documentation lies. Go with what’s actually there

Those are DDR3 SODIMM memory module slots. They are the same thing used on laptops. Often manufacturers use them in small form factor PCs to save space.

It’s ddr4, don’t worry

Jeesuz bro, you’re so dim

The laptop manufacturer upgraded the motherboard but did not change the labeling.

It is easier to change out a few components to upgrade the pc vs reprinting a new board.

Those are DDR4 slots.