I am upgrading my motherboard and CPU to a Gigabyte z170 and a 6600k, I know nothing about PC's other than these aren't bad specs but I was wondering if I had to buy a ram stick that is DDR4 (whatever that means) in order to use it... I am so confused because I look on forums and they go off on rants with words that don't seem real I just want a simple yes or no and if yes then I need some reccomendations on which ram for a low price as I am not financially able to spend a huge amount on the ram