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FlyJim

FPS slump on approach

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Hi,

 

My P3D V3.2 runs very well. On Ground I have average 60fps. Everything is wonderful in flight. But I have an extreme FPS slump on approach and landing. I have an average of 15fps whatever airport or aircraft. It starts at 12.000ft.

I have my settings already turned down, with the same result.

My System:

Windows 7 64bit Intel Core i5 4690k @ 4,40GHz, Gigabyte Gtx 970 4GB OC, 12GB RAM.

Can someone help me?

Greetings from Germany

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Hi,

 

My P3D V3.2 runs very well. On Ground I have average 60fps. Everything is wonderful in flight. But I have an extreme FPS slump on approach and landing. I have an average of 15fps whatever airport or aircraft. It starts at 12.000ft.

I have my settings already turned down, with the same result.

My System:

Windows 7 64bit Intel Core i5 4690k @ 4,40GHz, Gigabyte Gtx 970 4GB OC, 12GB RAM.

Can someone help me?

Greetings from Germany

 

+1 and I have read several people complaining about the same. Unfortunately it seems to be a limitation/bad optimization of this build (?)

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+1 and I have read several people complaining about the same. Unfortunately it seems to be a limitation/bad optimization of this build (?)

+1

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Yeah I have 0 stutters until I start my descent to the destination then its stutters for say like 10-20 sec.    Then its ok again. 

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Strange problem, wondering if there is an add on that you all have causing this. 

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I have encountered it too, 5-7 seconds on descent nearing destination and then gone. I've tried everything, shutting off ai, shutting off GSX, playing with sliders, nothing fixes it so my guess is that it is an LM problem that has arisen only since V3.2 I have a feeling they will observe it and correct it in a future update.

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Strange problem, wondering if there is an add on that you all have causing this. 

 

I assume you are not suffering from this issue? Can you share what ad-dons are you using?

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I assume you are not suffering from this issue? Can you share what ad-dons are you using?

 

737 NGX. Active Sky, Soft Clouds, Rex texture Direct, Pro ATC X, GSX, Orbx Trees, EZdok, RAAS Professional, Traffic Optimizer, My Traffic 6, FS 2 Crew, UTX USA, Europe  Canada and Caribbean. 

 

Three year old Dell Desktop  i5 3.1 Ghz, GTX 750 TI, 6GB ram. Zero add on airports. 

 

P3D 3.2   No tweaks. 

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Zero add on airports

 

I never though about that before. It's probably something to do with addon airports.

I quite FS because I could not fix this issue. I exclusively flew from addon airport to addon

airport. Never bothered with default airports. I would encourage anyone to try an approach and landing

at a default airport (somewhere big like CYVR or CYYZ) and report back. :smile:

 

It would be great if we could pin this either on the P3D's or LM. Then we would know who to wag our finger at! :P

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737 NGX. Active Sky, Soft Clouds, Rex texture Direct, Pro ATC X, GSX, Orbx Trees, EZdok, RAAS Professional, Traffic Optimizer, My Traffic 6, FS 2 Crew, UTX USA, Europe  Canada and Caribbean. 

 

Three year old Dell Desktop  i5 3.1 Ghz, GTX 750 TI, 6GB ram. Zero add on airports. 

 

P3D 3.2   No tweaks. 

Makes sense thats pretty close to bare bones considering no ORBX regions and default airports only.

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I recently was descending to a non-addon airport and it still occurred so don't think that is the culprit. 

 

Seems to mainly occur in the PMDG 737NGX.  Aerosoft airbus, Majestic, etc don't seem to stutter on descent.  Not sure why because I get great 30fps with the PMDG. 

 

Another possible culprit from what I hear may be Orbx Vector, even though I have everything turned off except primary roads. 

 

ASN may be the other since I don't have Prevent weather injection on approach checked off which means it can inject weather during descent. 

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You know i saw this for the first time on approach to KSFO HD from Flightbeam. I had also installed UTX USA.

 

I can see you also use UTX USA. I wonder if this is the problem.

 

I dont have time to test at the moment but i'll disable UTX USA when i get a chance and check it out.

 

Unless you can do it sooner.

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I've tried it with ASN off, no difference, so it's not that.

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737 NGX. Active Sky, Soft Clouds, Rex texture Direct, Pro ATC X, GSX, Orbx Trees, EZdok, RAAS Professional, Traffic Optimizer, My Traffic 6, FS 2 Crew, UTX USA, Europe  Canada and Caribbean. 

 

Three year old Dell Desktop  i5 3.1 Ghz, GTX 750 TI, 6GB ram. Zero add on airports. 

 

P3D 3.2   No tweaks. 

 

With Aerosoft Buses A3xx, FTX Global, FTX Vector, FTX LC EU & NA, Pilots FS2010 Mesh, REX TD+Soft Clouds, ASN, EZCA, GSX, Traffic Optimizer, My Traffic 6, Pro ATC X and dozens of add ons airports with not a single Prepar3D tweak except (RSP). And I have the FPS Slump On Approach... so who knows which culprit might be. :Frustrated:

 

I recently was descending to a non-addon airport and it still occurred so don't think that is the culprit. 

 

Seems to mainly occur in the PMDG 737NGX.  Aerosoft airbus, Majestic, etc don't seem to stutter on descent.  Not sure why because I get great 30fps with the PMDG. 

 

Another possible culprit from what I hear may be Orbx Vector, even though I have everything turned off except primary roads. 

 

ASN may be the other since I don't have Prevent weather injection on approach checked off which means it can inject weather during descent. 

 

I don't own NGX's (yet) but have Aerosoft Buses and Majestic Q400 (Still don't know how to fly it so I really cant tell anything as I don't fly this aircraft just yet) but the issue is there with the airbus.

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Make sure to disable jetways animation in MT6 and others, it helped me immensely with the problem. Just an idea.

 

Dirk.

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Damn, was just about to post about this. I have been testing my bum off at OMDB. Don't know if more airports are affected. Every 5-7 seconds BAM, a drop in FPS. What frustrates me is that when not in stutter mode, I get more than double the FPS, so I KNOW the system can take it. What I also noticed is that:

 

the stutter slows down the SIM. In other words, it is not a simple drop in frame rates for me. But I actually cover less ground during the stutter. You would expect to cover the same amount of ground whatever the FPS. (Only the distance covered per frame would change) But not here. Say I'm on final at FlyTampa Dubai. I can visibly see the plane kind of "slowing down" over the ground, then "accelerate" (actually not accelerating, but returning to normal FPS), then after 5-7 seconds again.... It's like I'm driving my car while braking and throttling. Very very strange.......

 

Again, the most frustrating part is that when the stutter isn't active, I get double the FPS. The ONLY way I could eliminate it at OMDB is to turn down all sliders related to mesh, texture etc etc. FXAA, AA, Sampling, water detail (at least up to high) did not trigger the stutter. But as soon as I crank 1 or 2 of those sliders above min......it comes back.

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My 2 cents:

 

I would look to check if it is something related to your ground scenery; when you pitch down for the approach the ground area that you are looking to is really big and demanding compared to other flight phases (i.e. in climb you are looking to the sky - not much to load for the system)

 

For this reason I would try to lower all the "scenery" settings (Level of detail, tesselation, mesh&texture resolution, scenery complexity, autogens... and shadows as well). See if it changes and then start to increase the settings accordingly to required performance.

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I can visibly see the plane kind of "slowing down" over the ground, then "accelerate" (actually not accelerating, but returning to normal FPS), then after 5-7 seconds again.... It's like I'm driving my car while braking and throttling. Very very strange.......

 

That sounds like you have the sim set to unlimited frame rate but can't maintain VSYNC lock. You are locking the FPS in the sim?

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Glider1,

 

I either have my framerate set to unlimited or 20. I have tried the two of them. I have also tried turning VSync on and OFF, but don't know exactly how it works.

 

Say with my setup and flying in Dubai, I get 18 to 25 fps (which I am comfortable with) depending on time of day, spot or cockpit etc etc. What would be the best setup? VSync on? Off? Frames unlimited? Or how many?

 

Thanks in advance for your help. I'll try reading up on the VSYNC to framerate question as well but would appreciate your input.

 

 

Cheers,

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Say with my setup and flying in Dubai, I get 18 to 25 fps (which I am comfortable with) depending on time of day, spot or cockpit etc etc. What would be the best setup? VSync on? Off? Frames unlimited? Or how many?

 

When the FPS is that low, you can't get the simulator smooth there isn't enough headroom. You could try the radical approach of locking to 15FPS which is a multiple of 60HZ monitor refresh, then enable VSYNC and triple buffer. At least 15FPS would give you 3 FPS of head room above your 18FPS minimum. You need headroom when you want to get the simulator smooth.

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IMO, This is a performance hit plane and simple! The demand on the sim during final approach and landing is crushing. All other phases of flight are not so hard on performance. That's it, Nothing to do except wait :smile:

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Has anyone with this problem updated to Prepar3d V3.3 yet? And if so have you seen the same loss of FPS on approach is it cured?

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Has anyone with this problem updated to Prepar3d V3.3 yet? And if so have you seen the same loss of FPS on approach is it cured?

 

I am very curious about this as well!

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My initial test with P3D v3.3 has revealed that the FPS seem to be better during approach. I have noticed that there are fewer sporadic FPS drops that occur on final approach.

 

To give you an example: A while ago I created the following video (link is below), where I documented the FPS drop on approach in FSX and Prepar3D during a circle flight from and to KORD. In the video, I used version 3.2. With everything activated in ORBX vector, you can see that the FPS fluctuate relatively widely on approach, dropping below 20 relatively frequently. On a recent test under the same situation with the same settings using v3.3, I had relatively stable 22-23fps on final approach (just a few seconds before touchdown), and it turned out that refreshing the scenery (as done in the video with the other sims) was no longer necessary to boost the FPS after landing. I would need to do some more tests to arrive at a final conclusion, but for me, the difference was noticeable. (By the way, the VAS consumption was a little higher in 3.3 compared to 3.2 for me, but only by ca. 50 MB.)  Yet I'm also waiting for the announced hotfix, because I would not update if that breaks the compatibility with some older airport add-ons.

 

 

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Sounds promising nut my minimum requirement in all scenarios and at all times is 30fps. If I cannot maintain 30fps at 30hz at all times I am done with Flight Sim. In fact I am done with flight sim until that is a reality already. Sounds demanding I know but for years I dealt with the frustration of stutters in Flight Sim until I discovered the 30fps at 30hz solution and its beautiful! But as I see it is impossible to maintain over 30fps on approach on setting that I find acceptable. In fact I think it is impossible all together on any setting ion a large hub in an urban area. I understand that even if I upgraded to 2 GTX1080's in SLI, I still couldn't do it. Call me picky but I am done with it until this becomes a reality. Probably won't be long though! :BigGrin:

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