Please help, today i got new memory from a friend (elixir m2f2g64cb88g7n-cg), and my pc won't start with it, i think it has something to do with it being 1333mhz and my pc only goes with 1600 but i'm not really sure, do i need to change something in the bios? i read updating your bios will help, but it's too big of a risk. Hoping for any help