Why does RTSS report differently than FRTC?

Discussion in 'Rivatuner Statistics Server (RTSS) Forum' started by specfreq, Oct 14, 2019.

  1. specfreq

    specfreq New Member

    Messages:
    3
    Likes Received:
    0
    GPU:
    GTX 590
    https://imgur.com/a/oUSPFsf

    Here's some photos of FRTC showing perfect frame time but RTSS is showing it differently, even showing higher than 16.67ms when locked at 60fps. Can someone explain what is going on here?



    I also made a quick video test showing a very consistent screen tear using only FRTC indicating the stable frame timing without using RTSS.
     
  2. Andy_K

    Andy_K Master Guru

    Messages:
    435
    Likes Received:
    41
    GPU:
    MSI GTX 960 OC
    FPS are frames per second => an average calculated over the time of 1000ms
    Frametime = the time in microseconds a single frame needs to be rendered.

    As for all calculated averages there are some below and some above this.
     
  3. RealNC

    RealNC Ancient Guru

    Messages:
    3,106
    Likes Received:
    1,337
    GPU:
    EVGA GTX 980 Ti FTW
    FRTC seems to have a lower resolution for the graph? The graph says 70ms at the top, so I assume that's not enough resolution to show small variations and a result it looks perfectly flat.
     
  4. specfreq

    specfreq New Member

    Messages:
    3
    Likes Received:
    0
    GPU:
    GTX 590
    It says 70.8ms, but the frame-to-frame latency is 16.67ms~ which is better resolution than RTSS's 16.6ms report


    I've run the test again at 61 FPS cap and 60 FPS cap with FRTC.

    61 FPS cap

    60 FPS cap
     
    Last edited: Oct 14, 2019

  5. RealNC

    RealNC Ancient Guru

    Messages:
    3,106
    Likes Received:
    1,337
    GPU:
    EVGA GTX 980 Ti FTW
    Then I guess they are measuring differently, or at different locations. RTSS measures frame presentation call intervals in the process it has injected itself to. Do we know what FRTC is measuring? Maybe it measures what the driver does rather than what the game does?
     

Share This Page