From 3080ti to 4090, help with new settings.

[Arnaud]

Hello all,

I recently purchased a used 4090 (Gigabyte Gaming OC) that runs really well. Before that I was using a trusty 3080ti.

I'm on a 3840x1600 G-Sync 120Hz Alienware monitor and an Intel 13700K.

In order to have a buttery smooth experience in DCS, specially when turning my head quickly, I was using the following settings :

• V-Sync activated in DCS (not in NVC)
• 60 fps cap in NVCP
• G-Sync activated in NVCP
• Many others settings (MSAA x4, etc..) that should not be relevant to my question.

Since I've installed my 4090, turning my head quickly became kinda choppy/teary using the same settings compared to my 3080ti.

That was a big surprise for me considering that this card is way more powerful than the previous one.

What am I missing here guys ?

 

[Tzigy]

 

you are using G-sync, so...

try w/o V-sync

turn off the 60 fps cap or change to 118-120!! 

[SharpeXB]

Yes when using G-Sync it’s best to turn off Vsync and set a cap in NCP at your monitor rate or maybe 2-3 frames below if you see any tearing. Set the DCS frame limiter to max ie Off. 

[Arnaud]

Thank you @Tzigy and @SharpeXB, I will try to implement theses changes and come back to you asap.

But, do you have any idea why my experience was smooth before on my 3080ti with these previous settings ?

I try to make sense of it on a technical level.

[SharpeXB]

I’m using a similar system and my TrackIR experience is quite smooth. I’ve seen some people feel that syncing their monitor to TrackIRs 60 or 120 HZ makes things smoother but I can’t detect that myself. I also see you’ve tried 60Hz already. Plus it doesn’t seem to be a good use of your systems potential. 
Some things you could try if you haven’t already,

Set DCS to Full Screen. 
Try Low Latency Mode On or Ultra (Ultra might have made my DCS crash). 
Set Windows Power Mode to High Performance 

[Arnaud]

2 hours ago, SharpeXB said:

Set DCS to Full Screen. 
Try Low Latency Mode On or Ultra (Ultra might have made my DCS crash). 
Set Windows Power Mode to High Performance 

DCS is already Full Screen and my power management mode is done with QuickCPPU as I've unparked all my cores (and experienced noticeable improvements).

"Low latency mode" hasn't been changed so far. I may try this one and see how it goes.
 

2 hours ago, SharpeXB said:

syncing their monitor to TrackIRs 60 or 120 HZ

I guess the refresh rate of TrackIR is fixed, correct ? There's no way to change it I suppose.

Anyway thank's @SharpeXB for your additionnal tips.

I'll try later on.
 

[SharpeXB]

8 minutes ago, Arnaud said:

Low latency mode" hasn't been changed so far. I may try this one and see how it goes.

I don’t know if that would really have an effect but I figure TrackIR is an input device sorta like a mouse, it couldn’t hurt

9 minutes ago, Arnaud said:

I guess the refresh rate of TrackIR is fixed, correct ? There's no way to change it I suppose.

TrackIR is 120Hz. There is some thinking that having your monitor at a multiple of this can make the resulting image smoother. I can’t see any effect of this myself and I see you already tried setting 60hz on your screen. I have my refresh rate capped at 117 and get anywhere between that and perhaps 90FPS depending on the situation. I don’t detect and loss of smoothness either way. 

[Arnaud]

11 minutes ago, SharpeXB said:

I see you already tried setting 60hz on your screen

Technically my screen is always set @ 120Hz. It could go up to 144Hz but I would loose some bit of info color wise. So, I settled @ 120Hz.

I previously capped my fps @ 60 when using my 3080ti (but kept my monitor refresh rate @ 120Hz). I tried 90 but couldn't sustain this framerate 100% of the time.

Now, with the 4090, I can see rock solid 90 fps (when capped at this setting) but moving my head quickly is not what I was expecting.

I'm confident that your tips about G-Sync and Vertical Sync might be the issue here. 

Will keep you posted.

Thank's again @SharpeXB, DCS has an amazing community.