Why is my framerate locked at 40?

[Lace]

In almost any situation, on any map and flying any module, my frame rate is locked at 40, and I am CPU bound.  The DCS menus are locked at a solid 80fps.  It has been like this for some time, and changing graphics settings seems to make little difference, only increasing or decreasing the stutters, but never the FPS.  I have a laptop 3080 and a Rift S.

I have 120 set in the DCS frame rate limiter setting, and have disabled the FPS limiter in the Nvidia control panel. 

Is there another setting somewhere which could be causing this?  Is there something in the Oculus config which might cause it?

[Qcumber]

8 minutes ago, Lace said:

In almost any situation, on any map and flying any module, my frame rate is locked at 40, and I am CPU bound.  The DCS menus are locked at a solid 80fps.  It has been like this for some time, and changing graphics settings seems to make little difference, only increasing or decreasing the stutters, but never the FPS.  I have a laptop 3080 and a Rift S.

I have 120 set in the DCS frame rate limiter setting, and have disabled the FPS limiter in the Nvidia control panel. 

Is there another setting somewhere which could be causing this?  Is there something in the Oculus config which might cause it?

It looks like asynchronous spacewarp is enabling. This runs at half the headset refresh and adds an extra frame so that 40 becomes 80. It is smoother than not reaching the target refresh but adds movement blurring and ghosting. 

You can toggle the settings using these keys:

CTRL+KP1 - Disable ASW and USE ATW

CTRL+KP2 - Force apps to 45hz, DISABLE ASW

CTRL+KP3 - Force apps to 45hz, ENABLE ASW

CTRL+KP4 - Enable ASW to operate

[Lace]

19 minutes ago, Qcumber said:

It looks like asynchronous spacewarp is enabling. This runs at half the headset refresh and adds an extra frame so that 40 becomes 80. It is smoother than not reaching the target refresh but adds movement blurring and ghosting. 

You can toggle the settings using these keys:

CTRL+KP1 - Disable ASW and USE ATW

CTRL+KP2 - Force apps to 45hz, DISABLE ASW

CTRL+KP3 - Force apps to 45hz, ENABLE ASW

CTRL+KP4 - Enable ASW to operate

Thank you that's useful, however, I don't have a separate keypad on my laptop - is there anywhere else I can toggle those settings?  If not I can find an external keyboard to plug in.

[Qcumber]

15 minutes ago, Lace said:

Thank you that's useful, however, I don't have a separate keypad on my laptop - is there anywhere else I can toggle those settings?  If not I can find an external keyboard to plug in.

You can also use oculus tray tool to change settings and set your own keybinds. 

https://www.apollyonvr.com/oculus-tray-tool

I bind these to HOTAS buttons then I can easily toggle settings while flying. 

 

Edited May 23, 2024 by Qcumber

[Lace]

8 minutes ago, Qcumber said:

You can also use oculus tray tool to change settings and set your own keybinds. 

https://www.apollyonvr.com/oculus-tray-tool

I bind these to HOTAS buttons then I can easily toggle settings while flying. 

 

 

Brilliant, thanks.  I'll have a play later today.

[Qcumber]

3 minutes ago, Lace said:

Brilliant, thanks.  I'll have a play later today.

I've been using a rift s for years so give me a shout if you need any help tweaking settings etc. 

[Robi Hobby]

OMG   CTRL+KP1 - Disable ASW and USE ATW   an now i have more fps not mor the fix 40  , it goes to 55 60 up     Big Thank´s   

[Qcumber]

1 hour ago, Robi Hobby said:

OMG   CTRL+KP1 - Disable ASW and USE ATW   an now i have more fps not mor the fix 40  , it goes to 55 60 up     Big Thank´s   

You can now tweak DCS settings to see if you can get 80 fps. You can get a big performance boost with fixed Foveated rendering. The rift s is not so sharp at the edges anyway so you can keep a high res in the centre and lower res at the edges. Try Quad Views Foveated Rendering. 

https://github.com/mbucchia/Quad-Views-Foveated

 

[Lace]

Tried this last night, and indeed, a single simple keypress resulted in an almost 50% improvement in frame rates.  It's amazing how many of these little details seem completely lost to the average user.

Many thanks @Qcumber, I owe you a beer.