Ohh... I see... Im not used to the internal part of the laptop...
Thanks for your post.. Helped me a lot... Thats mean i can get maximum 16Gb of ram if I bought the original 4GB model..  At least i felt more confidence to get the g551jw...
Do you familiar with lowyat store? Know where i can get the model Asus G551jw Dm016H with an affordable price at lowyat area?
I've already pm-ed someone in this forum who sell this model at rm3580,seems like he is busy and didnt read my message yet... I preferred physical store...

for lowyat you can go to gaming brightstar, they got promotion for now, but rm 3580 i think is quite hard.....