Add a matching stick instead of replacing both.

Yes, get dual-channel—but the smart move is to add a second identical 8GB stick if you can find one. Buying a whole new 2x8GB kit is throwing money away if your current stick is still good and you can match the speed and timings.

Dual-channel memory gives you a noticeable boost in gaming and multitasking. A single stick bottlenecks performance because the CPU can only use one lane at a time. Adding a matching stick gives you the exact same result as a new kit for half the cost.

If you can’t find an exact match (same model, same specs), then sure, bite the bullet and buy a matched pair. But check your motherboard manual first—some boards are picky about mixing sticks. Otherwise, just buy the same stick you already have.

Future you will thank you for the extra bandwidth.