Hello, i got an Asus x550ln laptop 3 months ago with 4gb ram. My laptop has 1 slot for additional ram and every site i searched, it supports ram till 12 gb. Yesterday i bought a kingston 4gb ram 1600 mhz ddr3 sodimm supposedly working on my laptop. I tried numerous times get it on and back off to see if it will work but i had no luck. Is there any chance my lap won't support any additional ram? And if so why is there an additional slot and why the manufacturer doesn't say so on specs? I'm kinda desperate here so i would appreciate any answers and help.