Locked or Unlimited FPS

[Noah101 0]

Which is the best option?

 

Specs - GTX 980TI, i5-4460, 8gb ram

[ESzczesniak 128]

The ultimate answer is test it out on your machine and see.  With that said, I think there is some thought it seems that P3D does better with locked FPS that help limit micro stutters.  The effect of using the built in frame rate limiter is also not as dramatic.  I remember in FSX I'd lose 10-12 FPS with a locked frame rate vs unlimited, in P3D, it only seems about 1-2 FPS for me.

[MarkDH 234]

Which is the best option?

 

If there was a best option it wouldn't be optional :wink:

[captainofflight 2]

I`ve got a GTX 980Ti too and I get better frames with unlimited fps...try and find out!

[Forkboy2 27]

I had been using unlimited since there was a significant drop in frame rates if I set it to anything else.  But I would get very bad blurry ground textures.

 

Now I set FIBER_FRAME_TIME_FRACTION=0.01, change frame rate limiter to 26 and also use NVIDIA inspector to lock frame rates to 26, which has been working well for me.  Don't get blurry textures, don't get frame rate drop, and don't get tearing.

 

i5-2500K with GTX-970.

[klamal 282]

I had been using unlimited since there was a significant drop in frame rates if I set it to anything else.  But I would get very bad blurry ground textures.

 

Now I set FIBER_FRAME_TIME_FRACTION=0.01, change frame rate limiter to 26 and also use NVIDIA inspector to lock frame rates to 26, which has been working well for me.  Don't get blurry textures, don't get frame rate drop, and don't get tearing.

 

i5-2500K with GTX-970.

I have same CPU/Video card as you.  Are you using an affinity mask at all?  I'm currently running with unlimited and then adaptive half sync in Nvidia Control Panel and also at 2x DSR.  But certain situations cause a barely acceptable situation.

 

Yesterday, for instance, I had stutters and tried messing with all kinds of display settings in P3D but couldn't find anything that would help it.  The next flight though is smooth and no problems.  But, different time of day.  For me, I seem to have issues at times of day where the sun is the highest in the sky and/or I'm closer to tropical latitudes.  I can fly in Orbx EU Norway and maintain a smooth performance all the time.  But then a flight to GCLP(which was where I was going to yesterday) will stutter.  Can't quite pin down why yet.  I'll maybe give these settings you use a try once and see what happens for me too.

[Forkboy2 27]

 

 

 

 

have same CPU/Video card as you. Are you using an affinity mask at all? I'm currently running with unlimited and then adaptive half sync in Nvidia Control Panel and also at 2x DSR. But certain situations cause a barely acceptable situation.

 

I'm using all 4 cores. I do get some stutters around very high detailed airports, but not too bad.  I'm also using UT2 with pretty much all major airline liveries and GA traffic assigned.

 

I end up making compromises depending on what type of flying I'm doing so I can keep frame rates in the range of 20-26 fps.  If I'm flying PMDG 737, then I disable ORBX, GA traffic, and road/water traffic, but set airliner traffic at 100%.  If I'm flying a GA airplane, then I enable ORBX and GA traffic, but dial down airliner traffic significantly. 

 

I use SimStarter to set up scenarios so all the necessary settings (including UT2 settings) are tweaked automatically.

 

I also took the radical step of reducing all my default ground textures from 1024x1024 to 512x512.  I don't recommend this, but based on the type of flying I do, which is either GA flying in ORBX regions or long haul flights at high altitude, it works for me.  I actually have it set up to automatically switch back and forth between 512x512 and 1024x1024 using SimStarter, but I pretty much just stick with 512x512.

 

Oh, and I'm using a 43" monitor set at 3840x2160

[GSalden 4,657]

I had been using unlimited since there was a significant drop in frame rates if I set it to anything else.  But I would get very bad blurry ground textures.

 

Now I set FIBER_FRAME_TIME_FRACTION=0.01, change frame rate limiter to 26 and also use NVIDIA inspector to lock frame rates to 26, which has been working well for me.  Don't get blurry textures, don't get frame rate drop, and don't get tearing.

 

i5-2500K with GTX-970.

How did you limit the framerate to 26 in NVI ?

The lowest I have found is 29 and I would like to go a little lower...

[Forkboy2 27]

 

 

 

 

How did you limit the framerate to 26 in NVI ?
The lowest I have found is 29 and I would like to go a little lower...

 

Open CustomSettingNames_en-EN.xml with a text editor and look for the following.  You can add custom settings.  See below for some examples.  I just changed some that I will never use to values that I want.

 

Not sure if it's just a placebo effect, but setting NVI frame rate to match what I have P3D set to seems to fix the bad ground texture tearing that I see otherwise.

 

 <CustomSetting>
      <UserfriendlyName>Frame Rate Limiter</UserfriendlyName>
      <HexSettingID>0x10834FEE</HexSettingID>
      <MinRequiredDriverVersion>280.26</MinRequiredDriverVersion>
      <Description />
      <GroupName>Sync and Refresh</GroupName>
      <SettingValues>
        <CustomSettingValue>
          <UserfriendlyName>Off</UserfriendlyName>
          <HexValue>0x00000000</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>29 fps</UserfriendlyName>
          <HexValue>0xF000001D</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>30 fps</UserfriendlyName>
          <HexValue>0xF000001E</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>31 fps</UserfriendlyName>
          <HexValue>0xF000001F</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>22 fps</UserfriendlyName>
          <HexValue>0xF0000016</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>24 fps</UserfriendlyName>
          <HexValue>0xF0000018</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>26 fps</UserfriendlyName>
          <HexValue>0xF000001A</HexValue>
        </CustomSettingValue>
        <CustomSettingValue>
          <UserfriendlyName>28 fps</UserfriendlyName>
          <HexValue>0xF000001C</HexValue>
        </CustomSettingValue>

[GSalden 4,657]

Thanks man !

[Andreas Stangenes 1,628]

In complex aircrafts i seem to have better results with unlimited frames. I have gtx980ti xtreme, 6700k @4.7ghz and 16gb ddr4.

[Michael Moe 495]

i would say unlimited. My fps is cut to 60% in complex aircraft using limited

 

smooth enough for me using unlimited.

 

2 X GTX970SC

I7-47770k@4.6 ht on

 

Michael Moe

[irrics 1,517]

Why do we lose FPS when using the built in frame limiter?

 

Is it better if you leave that at Unlimited by use the NVIDIA frame limiting options?

[Forkboy2 27]

 

 

Why do we lose FPS when using the built in frame limiter?

 

Unlimited will prioritize high frame rates over scenery generation, so you might end up with blurry ground textures, autogen not filling in fast enough when you are flying really fast, etc.  If you limit the frame rates, then more CPU cycles are given to scenery generation, which results in lower frame rates.  If you are happy with your scenery, then I would leave it set to unlimited.  If you have issues with scenery, then try limiting it.

 

FIBER_FRAME_TIME_FRACTION=???

This setting also is part of it.  If you set to unlimited, this setting is ignored.  If you limit the frame rates, then this setting applies and will determine how many CPU cycles are given to scenery generation.  For me, setting FIBER_FRAME_TIME_FRACTION=0.01 is a good compromise and improves scenery generation without much impact on frame rates.

 

Unlimited might also result in ground texture tearing on some setups.

[Michael Moe 495]

Unlimited will prioritize high frame rates over scenery generation, so you might end up with blurry ground textures, autogen not filling in fast enough when you are flying really fast, etc.  If you limit the frame rates, then more CPU cycles are given to scenery generation, which results in lower frame rates.  If you are happy with your scenery, then I would leave it set to unlimited.  If you have issues with scenery, then try limiting it.

 

FIBER_FRAME_TIME_FRACTION=???

This setting also is part of it.  If you set to unlimited, this setting is ignored.  If you limit the frame rates, then this setting applies and will determine how many CPU cycles are given to scenery generation.  For me, setting FIBER_FRAME_TIME_FRACTION=0.01 is a good compromise and improves scenery generation without much impact on frame rates.

 

Unlimited might also result in ground texture tearing on some setups.

 

 

But why is someone using an external limiter from NI for instance. What advantage should that bring to the table ?

 

 

Thanks

 

Michael Moe