Single stick vs dual-channel RAM: Single stick works but dual-channel is faster for demanding tasks

One stick runs in single-channel mode, which hurts performance 5–15% for gaming, video editing, or heavy multitasking. For web browsing and Office work, you won’t notice the difference. Modern motherboards handle mismatched sticks well if you match speed and capacity later. Single stick is a fine stopgap on a tight budget, but your future self will thank you for finishing the pair.