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 6400 MT/s and 6000 MT/s.

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): KLEVV CRAS V RGB DDR5-6400 KD5AGUA80-64A320G (32-38-38-78) - 1:1 Ratio
Memory (2): G.SKILL DDR5-6000 F5-6000J3038F16GX2-TZ5N (30-38-38-96) - 1:1 Ratio





Benchmarking Forza Horizon 5 using the low graphical settings helps to illustrate how sensitive AMD is to memory frequency and overall timings, as they can affect the average frame-rate and the 1% lows. Since both memory kits are running in a 1:1 ratio, the 6400 MT/s kit pulls ahead. However, as we get to Doom Eternal, the Infinity Fabric becomes a factor and can affect latency sensitive games.




By increasing just the graphical settings, the same scenario plays out in each game tested. The gap between the two kits shrinks as more calculation time for each frame is spent on the graphics card instead.




Raising the game's resolution to 4K means Forza Horizon 5 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 nearly indistinguishable at this resolution using an RTX 4090 going by the average frame rate.