Will upgrading from 8GB to 16GB of RAM make a noticeable difference for 1080p editing in DaVinci Resolve?

Yes. Going from 8GB to 16GB will cut preview lag significantly—not eliminate it completely, but you’ll actually be able to edit without constant stuttering. 8GB is the bare minimum to launch Resolve, and the OS eats it up, leaving nothing for smooth playback. 16GB gives you breathing room for typical 1080p timelines, though heavy effects or multicam will still lag. Make sure your laptop supports dual-channel memory (two sticks of 8GB) for maximum benefit.