Asus laptop Ram memory

[321456]

I know that Asus k501ux won't except external memory more then 8GB but can't really understand wheather the one i found is compatable with the laptop. (Kingston 8GB DDR3L 1600MHz CL11 Low Voltaj Notebook Ram)--this is the one i am looking at right now. DDR3L--part messes up everything complitely! Voltage is crucial part here! IS the one i found compatable?

 

[The Paladin]

according to the Asus web site it comes with internal 4GB (cannot change that) and upgradeable to 12GB so your looking for a SINGLE stick of 8GB
crucial web site http://www.crucial.com/usa/en/compatible-upgrade-for/ASUS/k501ux
says its 8GB DDR3L-1600 SODIMM, DDR3 PC3-12800 • CL=11 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V • 1024Meg x 64 • 61.99$
but looking for 8GB DDR3L-1600 SODIMM on newegg offerings start at 44$