John1975 wrote:If I lock the games above with RTSS then I can not see anymore judder in Witcher and Divinity, also AB will now display a flat line in frametimes. It is a clear improvement to me with RTSS.
You cannot measure frame times with Afterburner when capping the framerate with RTSS - especially if the output is borderless/full-screen windowed.
It is capping in the same step that it is sampling the framerate, so the frametimes would appear to be perfect.
If you were to follow
this guide for example, it sets things up so that it
looks as though you have prefect frame presentation, but it will actually stutter on the display.
If you're capping with RTSS, use FRAPS+FRAFS to graph the frametimes. FRAPS samples every frame, while Afterburner polls at 100ms, so FRAPS is technically more accurate too - but I find that Afterburner graphs are sufficient for finding frame-pacing issues as long as you're not also using RTSS to cap the framerate.
I'm not saying that RTSS
can't improve frame pacing, but I've never seen it help.
Note that the point in the rendering chain where Afterburner/FRAPS sample the framerate does allow for
some variance in frame-times without necessarily showing as stutter on the display. That first image displays perfectly smooth gameplay except for one stutter where it goes beyond 33.33ms.
An FCAT setup would be required for 100% accurate frame-time measurements to see what's actually reaching the display, but the results from Afterburner/FRAPS are sufficient for this sort of thing if you're using a single GPU.
John1975 wrote:The difference in Dishonored is minimal however, with or without RTSS the game seems smooth, though I feel it may be slightly smoother with RTSS...
Both you and Sparky suggest that the variable lag I notice is not some weird bug on my PC but rather expected behaviour if one uses framerate caps alongside Vsync.
My question now would be, is there a way to get judder free vsync without variable input lag on games where ingame Vsync is borked, as I said, the pre rendered frames tweak is not working for me in some games, some judder remains...
The frametimes that you're posting for Dishonored and The Witcher 3 look like there shouldn't be any stuttering.
I'm wondering if there's a bigger issue with your setup here - perhaps something like your display dropping frames.
The variable input lag is a thing that
can happen, not something which is guaranteed to happen.
What type of gamepad are you using? If it's a DualShock4, the DS4Windows config has a "Flush HID" setting.
I've found that either having it enabled/disabled can cause certain games to stutter - it was a problem with
MGSV: Ground Zeroes for example. (but not
MGSV: The Phantom Pain)
One thing I'd try is reducing the graphics settings for a game to its minimum - perhaps even lowering the resolution - and seeing if that helps at all.
EDIT: I just noticed that you said your 2600K is running at stock speeds in the first post. That's probably the reason why.
I have a 2500K running at 4.5GHz. If I run it at the stock 3.6GHz I get stuttering in some games because the CPU is too slow.