Should I use dual-channel DDR4 or single-channel DDR5 for gaming?

Use dual-channel DDR4 for gaming. It outperforms single-channel DDR5 because latency matters more than raw bandwidth in games, and dual-channel DDR4 keeps latency low while doubling bandwidth. DDR5 only becomes better when running dual-channel or at speeds above 6000, which costs more. Don’t overpay for worse performance.