Should I buy two 16GB sticks or one 32GB stick for my computer?

Buy two 16GB sticks. A single 32GB stick runs in single-channel mode, cutting memory bandwidth roughly in half compared to dual-channel with two sticks. That matters for gaming, video editing, compiling code, and heavy multitasking—you might lose 5–15% FPS in games. Only buy one 32GB stick if you plan to upgrade to 64GB later.