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.




Doom Eternal uses a highly optimized game engine, which helps computers with weaker processors. It also illustrates how much memory latency matters for the AMD CPU. As mention in the Forza Horizon 5 section, AMD's Infinity Fabric (FCLK) will have an impact on latency under the right circumstances. While AMD advises to leave the FCLK at 2000 MHz (Default), if it is not kept in step with the memory frequency, it can actually be worse for the overall frame rate. In the example above, we have both memory kits in a 1:1 ratio, but both also have a FCLK of 2000 MHz. This represents what to expect without any additional adjustments in the BIOS besides selecting 1:1 ratio.

We can see that the 6000 MT/s memory kit still beats this even though 6400 MT/s offers higher bandwidth, though the latency is dependent on the primary and secondary timings as well.




By raising the resolution to 4K, the gap shrinks and causes both memory kits to be on equal footing. This is because the game is completely GPU-bound, leaving the graphics card last to finish each frame calculation. Here, though, for this specific memory kit, there is still a frame gap.