So, I'm trying to upgrade my laptop's memory. I bought an Asus X550LN, it has a haswell i7-4200 alongside with an 8 gb or RAm but when I opened the backlid, the ram had a Samsung 4gb 1rx8 pc3l-12800s-11-13-b4 label. I don't get it because base on dxdiag, task manager and cpu-z, it is running on 8gb of RAM.