Max RAM

My ASUS K55VJ came with 6 GB installed. I'm looking to upgrade to 12 GB at least. Two slots for RAM are available and both are occupied (photos of my dusty RAMs), a 2 GB: and a 4 GB: As the title says, ASUS specs states 8 GB is maximum. And yet here is a video of a person claiming to upgrade...

Hi everyone, I believe this is the most appropriate sub-forum for this post. Please forgive me if it's not or if this post should be several different posts in various sub-forums. Basically, I have a Sony Vaio VGN-z520n laptop that has an Intel Core2 Duo P8400 cpu which I purchased back in...