Add a matching RAM stick for dual-channel.

Yes, but match the size and speed for best results.

Most modern laptops with soldered RAM have one free slot. If you already have 4GB soldered, adding another 4GB stick of the same DDR generation and speed will enable dual-channel mode for the first 4GB of each. That gives a real performance boost in multitasking and memory-heavy apps.

You could add an 8GB stick instead, giving you 12GB total, but only the first 4GB of each will run in dual-channel — the rest is slower single-channel. Still an upgrade, just not as tidy. Check your laptop’s specs for max capacity and supported RAM types. I’d use CPU‑Z to see what’s already in there before buying.

Future