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.

PCIe 4.0 x8 vs PCIe 3.0 x8

Let's start with a realistic matchup: PCIe 4.0 vs 3.0, which is relevant when you plan on using the RX 6600 XT in a PCI-Express 3.0 capable system. We'll be looking at the resolution of 1920x1080 Full HD—the primary resolution that RX 6600 XT was designed to operate on.

























Not much to see here, except for Hitman 3, the differences are almost negligible.

PCIe 4.0 x8 vs PCIe 1.1 x8

I also wanted to take a look at a "worst-case" scenario, so now we'll be taking a look at how the frametimes are affected when using the PCI-Express 1.1 interface. No modern PC uses this interface, so it's only a theoretical look at the state of things, results will still be interesting. For this section I also intentionally picked the charts showing the games with the biggest issues, at the resolution most affected.