I have a gaming laptop (GL552VW) and I want to add more RAM into it. In the asus webpage it says it is upgradable up to 16 gigs of RAM and 8 gigs by default. Same goes with task manager, it says 2 of 4 RAM slots used, but I opened my laptop I only see 2 slots and they are used, those 2 slots have 4 gigs in each which adds up to 8 gigs. My question is where are the two other empty slots or is task manager lying?