Frametime Analysis

We present a more in-depth analysis than just average FPS to show how the framerate changes over time, which helps highlight FPS drops. Minimum FPS at both the 95th and 99th percentile are reported in these charts, too. A second chart, a histogram, shows shape and spread for the frametime data—how tightly grouped the measurements are. The "IQR" result is called "Interquartile Range," which is an outlier-resistant statistical value that tells us the range in the middle of the frametime distribution.

In the following charts, we are comparing two retail memory kits. The sub-timings are based on the individual XMP and EXPO profiles and are not adjusted further. By doing so, these charts represent a direct comparison between two memory kits. These both have different, sizes, primary timings and frequency while still maintaining a 1:1 memory ratio. The 48 GB kit is designed to represent a more budget friendly option, while still having a larger capacity over the standard 32 GB DDR5 offers.

Tests are conducted with the following components:
CPU: AMD Ryzen 9 7950X (Locked All-Core 5.2 GHz)
GPU: PNY GeForce RTX 4090 XLR8 VERTO
Memory (1): XPG Lancer Blade RGB DDR5-6000 32 GB AX5U6000C3016G (30-40-40-77) - FCLK 2000 MHz - 1:1 Ratio
Memory (2): DDR5-6000 48 GB (42-42-42-82) - FCLK 2000 MHz - 1:1 Ratio




Comparing both of these memory kits with low graphical settings helps to illustrate how sensitive AMD can be to memory frequency and overall timings. Here both memory kits are single-rank DIMMs running at 6000 MT/s, but the primary timings on this XPG Lancer Blade kit is lower, thus more raw performance potential. There is a 22 FPS difference in the average alone, with a distinct gap for the 1% lows as well.




By increasing the graphical settings, the overall frame rate is lower, but it is still roughly the same gap. Higher graphical settings often increases the CPU workload as well.




Finally, by raising the game's resolution in Cyberpunk 2077 to 4K, it becomes completely GPU bound, leaving the CPU often waiting on the graphics card to finish each calculation. With a margin of error of 3%, these two memory kits are indistinguishable at this resolution using an RTX 4090.