A-Tech 4GB Stick for Asus K Notebook Series K43BY K43E K43SA K43SJ K43SV K43TA K43U K45A K45DR K45VD K45VJ K45VM K45VS K46CA K46CB K46CM K52JV K53BY SO-DIMM DDR3 Non-ECC PC3-12800 1600MHz RAM
Asus soldered a cage around removable ram! Wanted to upgrade a old laptop. If you look close at the 2nd picture you see DDR3 traces and a mounting bracket. : r/pcmasterrace
Three A Tech Computer Sales and Services: Used Laptop Asus UltraSlim S56CM Core i5 2GB Graphics 500GB HDD+24GB SSD 15.6 inch Warranty till SEPT 2014 (RM 2085)
OFFTEK 4GB Replacement Memory RAM Upgrade for Asus K56CM (DDR3-12800) Laptop Memory at Amazon.com