I currently have one 16GB DDR5 memory stick in my home gaming PC. A 32GB kit is unusually expensive where I live, so I'm wondering whether buying another 16GB stick individually would be worthwhile or just a waste of money. I'd ideally match the existing stick's speed and timings. How much difference should I expect from having 32GB and running two sticks, especially in games?
4 Answers
Adding another 16GB stick should work fine, especially if it matches your current stick’s capacity, speed, timings, and voltage. Ideally buy the exact same model, but even then, separate kits aren’t guaranteed to be perfectly identical internally. Check the label on your current DIMM and use CPU-Z or similar software to record its specifications before buying.
There are two separate benefits here: more capacity and additional memory bandwidth. Two sticks can improve frame rates and, more importantly, 1% lows and stutter in some CPU-limited games. The improvement varies a lot—some games may gain only a few percent, while memory-sensitive titles can improve by 15% or more. It isn’t guaranteed to be a dramatic upgrade, though.
At higher resolutions, the graphics card is more likely to be the limit, so the difference may be smaller. CPU-heavy games and very high-refresh-rate gaming are where the second stick is most likely to matter.
First check whether you’re actually running out of memory. Watch RAM usage in Task Manager while playing your usual games. If you’re nowhere near 16GB and your frame rates and stutter are fine, capacity alone isn’t urgent. If usage is close to full, adding another 16GB gives you useful headroom and avoids relying on the SSD as overflow memory.
I’d add the second stick if the price is reasonable and you plan to keep this PC for a while, but don’t expect a night-and-day change. Make sure the modules are installed in the motherboard’s recommended paired slots, usually A2 and B2, and enable the memory profile in the BIOS afterward. If the exact matching stick is unavailable or costs nearly as much as a kit, waiting or buying a matched kit later may be the better value.
A single DDR5 stick isn’t exactly the same as older single-channel DDR4 because DDR5 DIMMs contain two 32-bit subchannels, but using two modules can still provide more overall bandwidth and may improve performance depending on the game.
Matching the advertised speed and timings is usually enough. You generally can’t verify the memory chips inside a stick before installing it, and different chips with the same specifications will often still work together.