just bought it from lowyat  3rd floor shop named MAXTEC . 
my device is dell inspiron 15 7559  DOS version.  price : 3250 rm  2 years  warranty.
in the beginning  he said 3490 rm ,  and i surprised with the price he give.
i told him why so  expansive  and i showed him LAZADA price  3249 rm 
he got shocked and changed the price to 3250 rm  same as LAZADA price .
and also i bought  SSD M.2 Adata for the laptop  Read : 550MB/s Write : 530MB/s
and 4gb ram  ddr3  1600 mhz  kingstone cost me  340 rm for both. 

SO............... 3250 + 340rm = 3590 rm .... that's a freckling  nice price for 960m with 128 gb ssd & 8gb ram  & i5 skylake processor  with 1TB hdd.

Note : DOS version is without windows ....its comes  with ubuntu ios .

hi everyone, i have questions about 7559

i am about to buy this laptop and i want to upgrade ram and ssd, so wondering

1/what type of ram compatible with 7559? 8gb price?
2/what type of (ssd brand and type) compatible with 7559? price?
thanks