I am trying to add RAM memory to the ASUS A555LN-XO112H. Currently, I have a standard configuration, i.e. 4GB, I would like to increase to the maximum amount. I was looking on the internet, I can not find a specific maximum amount somewhere I read that 12GB can anyone confirm? And is there only one RAM slot in this laptop? I found somewhere that 4GB are permanently on the motherboard and you can add 8GB in an additional slot. Total 12GB. I could ask colleagues to confirm or correct this information. What 8GB chip would be compatible and work with this laptop. Thanks in advance.