2x16GB vs 4x8GB RAM: 2x16GB wins for Ryzen 5000 builds

Two sticks are almost always better for Ryzen 5000 because the memory controller prefers fewer ranks per channel — 2x16GB gives the same rank count as 4x8GB without the extra electrical load, making higher frequency and tighter timings easier to achieve. You also keep two slots open for a future 64GB upgrade, while 4x8GB locks you into 32GB forever. Only go 4x8GB if you already have two 8GB sticks and buying two more is cheaper.