Two 16GB sticks are usually the better buy.

Yes, assuming your motherboard has four slots. Two sticks give you dual-channel memory, which bumps performance about 5–15% in games and other memory-sensitive tasks. One stick leaves half that speed on the table.

Cost-wise, a single 32GB stick is often a few bucks more than two 16GB sticks, maybe $5–10. The manufacturing and demand are slightly different, but it’s rarely a big gap. You’re not saving money by going single.

The only real reason to buy one 32GB stick is if you plan to upgrade to 64GB later and only have two slots. In that case, one stick now and another later makes sense. But if you have four slots, two sticks now—and you can always add two more later.

Get the two sticks. Your computer will thank you.