Asus A7s has only one memory upgrade slot?

I got in my hands an A7s and at bottom i can see only one slot of memory upgrade, where is the other one??

 

If it says it has two and you only see one in the underside compartment, it means that the other is probably underneath the keyboard.

Depending on the model, you will need to undo the K screws underneath the chassis and either a) press latches located along the edge of the keyboard and pry the keyboard off or b) undo a compartment cover along the top edge of the keyboard (usually has the power button and other things attached to it) and unscrew the screws underneath to remove the keyboard. Once underneath the keyboard, there's usually a metal cover hiding the socket, which you can install the RAM into.

It's generally good practice to install the DIMM into that slot FIRST so that you don't have to go through the trouble of getting to it afterwards.

 

thanks for the tip, this probably is my answer, i will try it out!