RAM purchasing questions

[Newblesse Obblige]

I have 2 questions regarding to RAM purchasing.

Is it ok to buy individual same brand, model, frequency, and latency sticks of RAM for dual channel instead of buying a proper RAM kit?
like for example: buying two individual trident z sticks or mixing ram from another trident z ram kit vs the actual trident z ram kit.
Additional to the previous question: will it enable dual channel and memory overclocking or XMP?

It is ok to buy and add another stick of RAM to your current system for dual channel?
example: I currently have 8GB RAM and im going to add another 8GB RAM(either same brand and model but different manufactured date or different brand but same capacity and speed).
Will this still enable dual channel?

Im currently using a i5 6400, an Asus h110m motherboard and single 2133 MHz RAM. I currently dont have a graphics card.

 

 

[MadAnt250]

4 minutes ago, 5GigaaHertz said:

It is ok to buy and add another stick of RAM to your current system for dual channel?

Yes.

4 minutes ago, 5GigaaHertz said:

I currently have 8GB RAM and im going to add another 8GB RAM(either same brand and model but different manufactured date or different brand but same capacity and speed).
Will this still enable dual channel?

Yes, I ran two different brands and models in my old setup just fine, but to play it safe buy same RAM stick, or if you find a different one in working order for dirt cheap or free, maybe give it a try.