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.




Depending on the game, graphical settings and game engine optimization, the outcome can be widely different. Forza Horizon 5 shows similar signs of being limited by the CPU. The system memory itself in this setup is the limiting factor for this particular setup when paired with an NVIDIA RTX 4090.




By increasing just the graphical settings, 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.