I haven't been using my Inspiron 5567 much, but will be in the very near future. I want to upgrade the RAM and I will also be installing a 1GB SSD at the same time.

Currently I have 8GB of RAM and I think I can add another 8GB of RAM as there is a 2nd slot 

Do Dell laptops only use Crucial RAM ? I am struggling to find Crucial 8GB DDR4 2400 Sodimm in South Africa, only 3200 Mhz. Will it cause a problem if I use this with the exisiting RAM?