Quote Originally Posted by Kayley View Post
I would never suggest mixing RAM, I just meant buying more of the same at a later date.
I'm not trying to jump on you about this, but that's still mixing RAM.

For a long time, I was under the impression that RAM "kits" were nothing more than just RAM sold together for the sake of marketing so that they could charge more money, and maybe it is when it comes to certain low-end manufacturers. However, Asus has a sticky post on their X99 forum talking about why mixing any RAM sets is bad—regardless of manufacturer/speed/timings/etc—and it's because the RAM kits are specifically binned and tested together to guarantee compatibility at the speed, timings, and density at which they're sold.

An additional side note with "buying more at a later date," is that there's no guarantee that you'll be able to find that particular set of RAM at a later point in time. You may be purchasing 14-14-14-32 3000MHz RAM, in white, but later when you want to buy the same white colored kit, it may be EOL and have been replaced with another kit with a slightly different set of timings, and therefore now you're SOL.

To be fair, this is really only an issue when people want to overclock their RAM (i.e. use XMP), because all RAM should just work together when at the bone-stock speed, but after what Asus posted a few years ago, I will always recommend that people buy the amount of RAM, in one kit, at the time of purchase.