ASUS Radeon R9 Fury STRIX review

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FCAT Frame Experience Analysis The Witcher III

With a benchmark technology called FCAT on the following few pages, we will look into Frame Experience Analysis. Basically with the charts shown we are trying to show you graphics anomalies like stutters and glitches in a plotted chart. Lately there has been a new measurement introduced, latency measurements. Basically it is the opposite of FPS.

  • FPS mostly measures performance, the number of frames rendered per passing second.
  • Frametime AKA Frame Experience recordings mostly measures and exposes anomalies - here we look at how long it takes to render one frame. Measure that chronologically and you can see anomalies like peaks and dips in a plotted chart, indicating something could be off. 
Frame time
in milliseconds
FPS
8.3 120
15 66
20 50
25 40
30 33
50 20
70 14

We have a detailed article (read here) on the new FCAT methodology used, and it also explains whay we do not use FRAPS anymore.

Frametime - Basically the time it takes to render one frame can be monitored and tagged with a number, this is latency. One frame can take say 17 ms. Higher latency can indicate a slow framerate, and weird latency spikes indicate a stutter, jitter, twitches; basically anomalies that are visible on your monitor.

What Do These Measurements Show?

Basically, what these measurements show are anomalies like small glitches and stutters that you can sometimes (and please do read that well, sometimes) see on screen. Below I'd like to run through a couple of titles with you. Bear in mind that Average FPS matters more than frametime measurements. It's just an additional page or two of information that from now on we'll be serving you.

The Witcher III Frame Experience Analysis


Per

Above, a percentile chart of the roughly one minute recording @ 2560x1440. In this particular chart we plot FPS and place it in relation to percentiles (lower is better).

  • For the tested card 50% of the time measured frames is under 20ms thus over 50 FPS.

Plot

Above, the card at WHQD. On this ~30 second run the graphics card manages to remain roughly below 20~25 ms; as you can see, there are four stutters recorded. This is me actually truning around to another location in the game (frametime wise lower is better).

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