CPU core 0 used more than GPU in v5.2.

[Ray Proudfoot 8,989]

1 minute ago, Cruachan said:

Yes, I have mine set to 120Hz and never need to change it - my PC is not restricted to flight simming. I limit FPS to 30 (120/4) using the NCP.

Mike

There’s your answer then @CaptKornDog, 144/4=36. Very doable. 😁

[CaptKornDog 286]

6 hours ago, Ray Proudfoot said:

There’s your answer then @CaptKornDog, 144/4=36. Very doable. 😁

Yes, that's what I limit it to in-sim.  My monitor does not have a 36 Hz refresh rate setting.

 

Setting it in Nvidia Control Panel leads to more stutters every few minutes (and the occasionaly DXGI Hung error), similar to what I described above until I minimize the sim and re-expand it.  Hence why I think somehow Gsync is fighting against something still.

Edited June 26, 2021 by CaptKornDog

[Ray Proudfoot 8,989]

@CaptKornDog, Have you tried turning off GSync? Or even tried 24 with GSync?

I always feel these ‘manipulations’ to achieve a desired refresh rate do incur a penalty.

[CaptKornDog 286]

4 hours ago, Ray Proudfoot said:

@CaptKornDog, Have you tried turning off GSync? Or even tried 24 with GSync?

I always feel these ‘manipulations’ to achieve a desired refresh rate do incur a penalty.

Yes, it results in screen tearing and still needs me to minimize/maximize the P3D window periodically to become smooth again when I start to see stuttering.  Chase Plane stuttering is still present, too, when the program is anywhere except minimized to the system tray.
 

24 Hz is essentially unusable for me, I can barely use the mouse at that refresh rate and flying is quite the opposite of smooth.

I suppose G Sync panels just don’t mix well with P3D and high refresh rates, and is compounded for some reason whenever Chase Plane’s program window is visible - and somehow on the backend the behavior temporarily “resets” when I minimize/maximize the sim.  And that this seems to be isolated from any behavior on the CPU.

 

 

 

Edited June 26, 2021 by CaptKornDog

[holliwutt 11]

Well, "G-Sync" works perfectly for me in P3D.
144Hz, limiter at 36 or 48 FPS and don't forget to tick "Variable Refresh Rate" in the P3D menu and set it to full screen.
For example, I start with the PMDG 777 from AS-EDDF with plenty of AI traffic without a single jerk.

[331BK 96]

Strange,

I´m not sure what it was but since I reset the BIOS and loaded my OC Profile again everything is back to normal. 

out of EGLL with TE GB, FSL A321 SL and 100 % AIG Traffic wonderful 23 - 28 FPS and as soon as the city is behind my it goes up over 30 again. 

Really strange, interested what`s happening when the release the HF.

[Dave_YVR 991]

2 hours ago, CaptKornDog said:

I suppose G Sync panels just don’t mix well with P3D and high refresh rates

I suspect more than anything that its your monitor is either an older gen G-sync or only G-sync compatible and not capable of the ultra low refresh rates that current gen G-sync  monitors.

[Dirk98 354]

On 6/25/2021 at 11:02 AM, f.skywalker said:

@Dirk98

Hallo Dirk,

can you post your Nvidia, FFTF Dynamic Settings.

What CPU and GPU are you use.

 

Thanks Frank from EDDM

 

Here you go Frank:

OS settings:

1) Windows version = 21H1 (OS Build 19043.1055) Windows 10 Pro

2) nVidia driver = Geforce 466.47 (it's time to update)

3) Windows Settings\System\Display\Graphics settings\Hardware-accelerated GPU scheduling = On

4) NCP\Low Latency Mode  = On (or Ultra, still monitoring this setting)

5) NCP\Max Frame Rate = 28 FPS (changed from 30, stolen from SteveW's settings, no final decision yet)

6) NCP\Shader Cache = On (not sure if it makes difference)

7) NCP\Vetical sync = Adaptive (half refresh rate)

8) NCP\Adjust desktop size and position = No scaling

9) NVPIv2.3.0.13\Prepar3D\Maximum pre-rendered frames = 1 

 

Principal Hardware:

Corsair Obsidian 900D box, ASUS ROG MAXIMUS XI HERO, I9 9900K, O/C @5.2GHz, Delidded, Custom Water cooling loop, AVX Offset = 0, HT=On, all power savings are off in BIOS, DDR4 32 Gbytes, 16x2 =@3200MHz, GIGABYTE GeForce RTX 2080 Ti Aorus O/C GPU 1665 MHz, Memory 14000MHz, NEC PA302W 2560 x 1600 Monitor, 4x1TB SSDs, GoFlight pannels 10 units, CH Franken potato full suite joysticks, VRInsight MCP II, FCU, XBOX Series X/NHL21, 3 client PCs, 2 additional monitors, 1 smartTV display attached.

Prepar3D Settings:

1) Prepar3D.cfg\[JOBSCHEDULER]\AffinityMaks=21845

2) Launch with SIMstarter NG

3) Prepar3D UI:

Display: 2560 x 1600 @60Hz, AA = 4x SSAA, Anisotropic = 16, Texture res = Medium 1024x1024, Dynamic Texture Streaming = On, VSync = On, Tripple Buff =  Off, Target frame rate = Unlimited, Wide-view Aspect Ration = On

World: LOD radius = 5.500000, Tessellation Factor = 90, Mesh res = 5m, Texture res = 1m, Use high-res terrain textures = On, Scenery complexity = Dense, Autogen draw distance = High, Autogen vegetation = Dense, Autogen building = Dense, Water Detail = Medium, Special effects detail\distance = Medium,  EA = On, Cloud Res = High, V. fog = On, Turbulence = On, Windshield effects = On, Cloud coverage density = On

Lighting: HDR lighting = On, Auto Exposure = On, Brightness = 1, Bloom =  1, Saturation = 1 (I need to tweak these after reinstall), Dynamic Reflections = Off, Shadow Quality = Medium, Shadow Draw Distance = Medium

FSUIPS Traffic Limit = 100 , AIG

FFTF AGL Height Scenario 0ft @0.01 to 7000ft @0.33 

Prepar3D software: ORBX TE GB, Netherlands, ORBX Base, openLC Europe \ North America, Vector, Trees HD, TerraFlora v2, Building HD, ORBX specific airports, SimWings, FlyTampa..... airports, GSX 2, Sode,  EZCA3.1 and many many more usual ones, oof...

Cheers

Edited June 26, 2021 by Dirk98

[GSalden 4,679]

8 hours ago, Dirk98 said:

Here you go Frank:

Hi Dirk,

Why do you have your monitor running @ 60 hertz, P3D with Vsync On and then Externally limited the franerate to 28 ?’

60/2=30 ,so limiting to 28 is running out of sync and can cause stutters/jitters….

 

 

Edited June 27, 2021 by Ray Proudfoot
Long quoted post mostly removed

[Afterburner 374]

Now I would like to know what is the advantage of running a screen natively at 30 Hz with unlimited FPS and Vsync on (which gives you effectively 30 FPS) over having the screen set at 60 Hz with FPS limited internally at 30 and Vsync on as well?  In the former case, the core0 load will be less than 100% if there is headroom (keeping the CPU cooler), but the mouse movement will be jerky. In the latter case, the core0 load will be 100%, and the FPS will drop unless you reduce the FFTF value, but what about the smoothness?  SteveW wrote that the internal limiter that:

Quote

... the time between frames is very stable if the settings allow it to complete frames within the specified interval

So I wonder if there is any difference in smoothness between the two options. This is an important questions for those who contemplate buying a new monitor with a potential 30 Hz native refresh rate feature, which only few screens provide. I can't go lower than 45 Hz on my current (temporary) screen, but not higher than 66 Hz, so I can't compare apples to apples (having 45 fps and a 90 Hz refresh rate). However, as I wrote, setting the FPS limit at half the monitor refresh rate delivers quite smooth movement.

@Ray Proudfoot Could you perform the test if you have time?  Set your screen refresh rate to 60 Hz, set the internal fps limit to 30 fps, and make sure that you add the following under the [MAIN] section of your p3d.cfg before starting the sim:

FIBER_FRAME_TIME_FRACTION=0.01

This ensures that you don't have an unnecessary loss in fps from limiting the frame rate internally. Also make sure that vertical sync in Nvidia Control Panel is set to "Use the 3D application setting". Do a test, and tell us how the smoothness feels compared to your standard configuration. That's all!

[Dirk98 354]

6 hours ago, GSalden said:

Hi Dirk,

Why do you have your monitor running @ 60 hertz, P3D with Vsync On and then Externally limited the franerate to 28 ?’

60/2=30 ,so limiting to 28 is running out of sync and can cause stutters/jitters….

 

 

I noticed SteveW used 28 so I decided to try (and I recall there was a discussion about 28 to 31 fps some time ago), no jitters so far, but maybe a snake oil. I should have better suggested 30 fps here perhaps.

Edited June 27, 2021 by Dirk98

[Dirk98 354]

50 minutes ago, Afterburner said:

Now I would like to know what is the advantage of running a screen natively at 30 Hz with unlimited FPS and Vsync on (which gives you effectively 30 FPS) over having the screen set at 60 Hz with FPS limited internally at 30 and Vsync on as well?  In the former case, the core0 load will be less than 100% if there is headroom (keeping the CPU cooler), but the mouse movement will be jerky. In the latter case, the core0 load will be 100%, and the FPS will drop unless you reduce the FFTF value, but what about the smoothness?  SteveW wrote that the internal limiter that:

So I wonder if there is any difference in smoothness between the two options. This is an important questions for those who contemplate buying a new monitor with a potential 30 Hz native refresh rate feature, which only few screens provide. I can't go lower than 45 Hz on my current (temporary) screen, but not higher than 66 Hz, so I can't compare apples to apples (having 45 fps and a 90 Hz refresh rate). However, as I wrote, setting the FPS limit at half the monitor refresh rate delivers quite smooth movement.

I switched my monitor to 30Hz refresh for a long time when there was no FPS limiter in nVidia drivers. But it was quite inconvenient switching everytime when I wanted to fly F4 BMS, DCS etc. I did some tests and ended up with setting it to 60Hz refresh for good and not bothering with switching anymore. Works very well here.

[Ray Proudfoot 8,989]

53 minutes ago, Afterburner said:

Could you perform the test if you have time?  Set your screen refresh rate to 60 Hz, set the internal fps limit to 30 fps, and make sure that you add the following under the [MAIN] section of your p3d.cfg before starting the sim:

FIBER_FRAME_TIME_FRACTION=0.01

This ensures that you don't have an unnecessary loss in fps from limiting the frame rate internally. Also make sure that vertical sync in Nvidia Control Panel is set to "Use the 3D application setting". Do a test, and tell us how the smoothness feels compared to your standard configuration. That's all!

Yes but it won’t be until tomorrow now. I’ll try the test away from London Heathrow as it’s a killer especially with Ai. Manchester probably.

[Dirk98 354]

59 minutes ago, Afterburner said:

Now I would like to know what is the advantage of running a screen natively at 30 Hz with unlimited FPS and Vsync on (which gives you effectively 30 FPS) over having the screen set at 60 Hz with FPS limited internally at 30 and Vsync on as well? 

By "internally" did you mean P3D UI or in the driver?

Thanks.

Edited June 27, 2021 by Dirk98

[Afterburner 374]

I mean in P3D graphics settings.