Using a Single RAM Module Instead of Two Reduces In-Game FPS

Soaring memory prices are pushing gamers to find ways to cut costs when building a PC, and one such option is installing a single DDR5 module instead of two. Experts have investigated how justified this decision is and how a single RAM stick impacts gameplay smoothness. The tests compared two configurations—one with a single module and one with two—paired with an AMD Ryzen 7 9700X and an RTX 5090 GPU across 13 different games.

The results showed that, on average across all titles, the single-module system was 12% behind in frame rate at 1080p and 1440p resolutions. At 4K, the gap narrowed to 9%. However, in some games, the performance drop was significantly more pronounced.

For instance, in Marvel Rivals, the difference in average FPS between one and two sticks reached a substantial 38%. A significant drop of over 20% was also recorded in Horizon Zero Dawn Remastered. Conversely, in games like Cyberpunk 2077, Counter-Strike 2, or Arc Raiders, the difference was negligible, amounting to just a few percent.

The savings from buying one module instead of two can be a considerable amount, especially at current prices, making it a sensible temporary solution if you plan to add the second stick later when memory costs normalize. However, it's also important to understand that in a number of games, you will immediately notice a drop in frame smoothness. The "1% lows," which reflect the minimum frame rates and overall stability, drop even more significantly in single-channel mode than the average FPS.

Installing a single DDR5 module is a double-edged sword. On one side, it's a real way to save money, but on the other, you risk a compromised gaming experience in titles that are heavily dependent on memory speed. The final decision rests with the user, who must weigh whether they are willing to tolerate potential performance dips for the sake of short-term savings.