iRacing Framerate Box
The iRacing Framerate Box is a helpful tool to use during your races, time trials, time attacks, practices, and qualifying in iRacing. While many people in iRacing knows that the Framerate Box is there, there are some that have no idea what the letters mean. To better understand the iRacing Framerate Box, pay attention to what each letter means below. Remember that some Framerate Box letters require to be activated in the options menu of iRacing when you are in the sim.
From Top To Bottom:
FPS = Frames per second and is the frequency (rate) at which consecutive images called frames appear on a display. The higher the better though there is a point where our eyes can't notice the difference which is at 150 frames per second but physiologically, our eyes can detect up to 1000 frames per second.
R Letter = CPU usage for rendering thread (smallest sequence of programmed instructions that can be managed independently).
G Letter = GPU usage.
L Letter = latency (delay) of your connection for data transmitted between your PC and the iRacing servers.
Q Letter = Connection quality between your PC and the iRacing servers. Green is good, Yellow is average, Orange is fair, and Red is bad.
C Letter = CPU usage for the physics thread (smallest sequence of programmed instructions that can be managed independently).
S Letter = Shows the service synchronization state or the "skew" of the connection to the iRacing servers. Green is good, Yellow is average, Orange is fair, and Red is bad.
P Letter = Page Fault Meter (PFM), which indicates if you are experiencing page faults because your system is using your disk drive to make up for lack of available physical RAM (Random Access Memory).
A Letter = Audio Performance Information which shows how much CPU time is spent processing sounds for playback, while XAudio2 shows how much CPU XAudio2 is using to mix it's audio streams.
F Letter = Force Feedback Clipping (FFC), which shows you if the wheel is clipping at maximum force even though the demanded force is higher than that. The idea is to keep the F rarely in the red.
X Letter = XAudio2 which shows the percentage of the available CPU time being used to mix sounds together. At 100%, the sound mixing would fall behind. A longer-term average is shown as a purple bar underneath.