How much RAM do I need for editing 4K in DaVinci Resolve?

32GB is the floor for 4K Resolve. 16GB will run but cause choppy playback, stuttering scrubbing, and system swapping once you add nodes, Fusion effects, or long timelines. Resolve is a memory hog, especially with compressed codecs like H.264 or H.265. Future You deserves 32GB — don’t save $60 now and curse yourself for two years.