Will adding more RAM fix the stutters in Battlefield 2042 with a Vega 56?

Not directly. Your Vega 56’s 8GB VRAM is the more likely culprit — Battlefield 2042 eats video memory, and when it runs out, you get micro-stutters. Lower texture quality to test; if stutters smooth out, you’re VRAM-capped. Upgrading to 32GB of RAM would be a waste here.