DDR4 CL14 vs DDR5 CL28: DDR4 still wins for Factorio

DDR4’s tighter CL14 has lower absolute latency than DDR5’s CL28 — about 7.8 ns vs 9.3 ns, a 20% difference. Factorio’s simulation loop is memory-latency-bound, so bandwidth doesn’t help. Faster DDR5 narrows the gap but doesn’t close it, making DDR4 the smarter choice for this game.