Ok I think I get it now. That means my RAM is not part of a set? And if I want to upgrade to 32GB I have no choice but to discard my current RAM?It's not part of a set, so a single 16 GB stick, but you can still add additional RAM. Just be aware that RAM can be a bit temperamental when mixed and matched and that in the event one stick is rated for higher speed or timings than the other(s) it will downgrade itself to match.