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urgeflaske

Horrible performance when flying through clouds

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So when flying through heavy clouds yesterday (AS16+ASCA) in the 737ngx my fps went down to 12-20 and when trying to look around in the cockpit it was lagging so much. When i got clear of the clouds fps went back to 30-50. This happens every time im flying through clouds. Is there any settings i can adjust so i wont drop that much fps?

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Do you have any AA driven by nvidia inspector?  MSAA and those types of AA can crush performance in clouds.

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I adjusted settings as Tony said, and haven't seen much visual difference. I also reduced layers of clouds down to 2-3. But, this is something that you're going to have to experiment with, to find what's best. All in all, there's not much to do unfortunately.


Do you have any AA driven by nvidia inspector?  MSAA and those types of AA can crush performance in clouds.

 

How does this affect performance in clouds? Does it diminish visuals? Is there instructions on where you can turn this off?

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Download the New P3D Guide v1.0. It walks you through setting up P3D and AS2016. Look on the main avsim page on the right just under the picture of Tom.

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Like the others wrote :

 

Try DXT 1024 instead of 32 bit 1024

If that is not enough , max 3 cloud layers and 512 clouds.

 

MA at 8 or 4

AF at 8 or 4

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How does this affect performance in clouds? Does it diminish visuals? Is there instructions on where you can turn this off?

If you don't know how to turn this off you probably haven't turned this on so don't worry about this. To let nVidia Inspector drive AA you have to download a program and set specific settings. You clearly haven't done that so you can forget about it. And btw AA with Inspector improves the quality of visuals quote a lot but at too big a price. Unless you have a really up to date screamin' fast PC.

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If you don't know how to turn this off you probably haven't turned this on so don't worry about this. To let nVidia Inspector drive AA you have to download a program and set specific settings. You clearly haven't done that so you can forget about it. And btw AA with Inspector improves the quality of visuals quote a lot but at too big a price. Unless you have a really up to date screamin' fast PC.

 

Also make sure you have installed one of the latest two Nvidia video card drivers.

Cheers, Ed

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What version of P3D are you  running?. If its anything less than 3.3.5 update to the latest version. The more recent versions of P3D solved much of the "cloud" FPS hit issues.

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Thanks for the help guys.

 

AA is set to 2x Sparse Grid Supersampling in NI Inspector.

 

I've always had the problem with fps loss when flying into clouds but i will update P3D eventually.

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AA is set to 2x Sparse Grid Supersampling in NI Inspector.

 

That will induce an FPS hit with dense clouds unless you are running SLI setup.  Lower cloud textures and reducing P3D cloud density setting will also help.

 

Cheers, Rob.

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That will induce an FPS hit with dense clouds unless you are running SLI setup.  Lower cloud textures and reducing P3D cloud density setting will also help.

 

Cheers, Rob.

 

Thanks.

Will it be any noticeable changes if i turn off AA?

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Thanks.

Will it be any noticeable changes if i turn off AA?

Well, turn it off and see if it is noticeable to you. After all, that's all that matters. ;) 2xSGSS isn't a high setting but you may see a difference when you turn it off: some won't notice it, others will. It also depends on the resolution you use. Anyway, turning it off won't damage your system or cost you anything so try it to see if graphics get bad or not and if performance goes up or not (specially in clouds).

 

Questions like these are a bit useless on a forum (if you don't mind me saying so) because you will get different replies from people with different systems and different priorities. Only you can decide if a change is noticeable and worth it or not. I often get the idea a lot of simmers don't trust their own judgement and rely on forum posts to figure out what to think and like and so on... ;)

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Well, turn it off and see if it is noticeable to you. After all, that's all that matters. ;) 2xSGSS isn't a high setting but you may see a difference when you turn it off: some won't notice it, others will. It also depends on the resolution you use. Anyway, turning it off won't damage your system or cost you anything so try it to see if graphics get bad or not and if performance goes up or not (specially in clouds). Questions like these are a bit useless on a forum (if you don't mind me saying so) because you will get different replies from people with different systems and different priorities. Only you can decide if a change is noticeable and worth it or not. Sometimes it seems people don't trust their own judgement... ;)

 

You're absolutely right, thank you :)

I used to have it off, and i remember that the GPU temp would be around 50 when flying. With it on im at 65, and flying through clouds it gets up to 71. I have no idea why i turned it on again, probably because someone told me i would lose some effects or something like that.

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With it on im at 65, and flying through clouds it gets up to 71.

 

That is normal for a GPU..., temps up to 80C are considered "warm" but not dangerous.

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That will induce an FPS hit with dense clouds unless you are running SLI setup.  Lower cloud textures and reducing P3D cloud density setting will also help.

 

Cheers, Rob.

Rob, I have 3 Titans X sc in SLI, having  4 or 8xSGS still brings my system to its knees.  As you described in your Tweak the  fact the P3D uses DX11is a curse, in my FSX-SE I have @ 8xSSG, no issues with AA or FPS, unfortunately, is a trade we have to consider. 

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I have Rex soft clouds with AS16 and see almost no performance problems flying through clouds, which I do a great deal at low altitudes. 

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Interesting - I switched to a 4K monitor and turned off sgss - no hit at all and AA is beautiful.

 

 

Vic

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I have Rex soft clouds with AS16 and see almost no performance problems flying through clouds, which I do a great deal at low altitudes.

 

The question then is if you use Inspector for SGSS. I don't and I also don't have problems in clouds. You will only get performance problems in clouds with specific AA settings.

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Rob, I have 3 Titans X sc in SLI, having  4 or 8xSGS still brings my system to its knees.

 

Odd, I only have 2 Titans X's in SLI performance mode and 4X SGSS AA at 4K res with overcast and very high graphics settings produces about 27-30 FPS but there are definitely many "long frames" (stutters) as I'm below my 30 FPS threshold (Vsycn at 30Hz).  

 

8X SGSS AA in 4K will bring FPS very low 15-19.  The power draw from my system when using 4X SGSS AA (both GPU's run at 80-90%) at 4K res in dense clouds will trigger my APC UPS to kick in and compensate for excessive amp/voltage draw thru my standard 15A 120v house outlet ... I kid you not.  And the heat extraction causes my Flight sim pit room temps to increase by almost 10 F just from SGSS AA usage.

 

But same test with just one Titan X and 4X SGSS AA and I see about 20-23 FPS in same scenario, so SLI is helping.

 

But I find SLI 8XMSAA and 4K to very acceptable for AA and with virtually no performance hit thru dense clouds at all and a lot less power draw and heat.  In my P3D guide I included various test scenarios with and without SLI and with and without SGSS AA.  SLI is definitely a benefit in my setup, but others have reported they see no benefit and/or even worse performance with SLI - I don't have an answer why some see a benefit while others don't?

 

Cheers, Rob.

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compensate for excessive amp/voltage draw thru my standard 15A 120v house outlet ...

 

Wow.  Are you actually drawing 15A (1800W if PF=1)?  I think code actually allows up to 20A at the outlet but there are usually multiple outlets and lights on the same breaker so sorry for the divergence. Back on that topic:  Just a 1 ohm resistance in the circuit will drop about 15 V at 15 A (for a non-reactive load V=I*R) so yeah you are getting into the range where 12 gauge wiring is desirable vs standard 14 gauge. Does your APC unit provide a clean sine wave or is it the typical stepped waveform using PWM?

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OT but I thought that whole pure sine wave vs stepped was a made up issue.

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I've been seeing very poor frame rates in P3D/AS16/ASCA at 1920x1200, 4XFSAA when in dense clouds, especially when faced with the overcast conditions. My 4970K/970 OC is struggling in the low teens to 20s in these conditions.

 

Tweaking general P3D terrain/complexity settings doesn't really offer much improvement. I'm at 1024/DXT clounds, with REX TD4 runways/water etc. Here the CPU is not fully loaded and it's the GPU pegged at 100%. 

 

Reducing the AS16 cloud layers to 3 or 4 helps but doesn't really shift things much.

 

Obviously the big killer is SGSS but quite honestly I hate how the external model and especially the cockpit dials look without it. I need it turned on.

 

The biggest improvement was to shift the cloud density in P3d from Max down to High. This has caused a significant improvement in frame rates, lifting me into the high 20s and 30s in heavy cloud conditions.

 

AS16 however now complains when I start up that it cannot do overcast conditions without clouds set to maximum density. But you know what? I'm happier with this setting - I was getting tired of almost constantly flying in overcast conditions where I couldn't see a thing, seemingly in direct contradiction to the METARS. 

 

My feeling is that the overcast conditions are way overdone and overused, and so for now I'm happier without them.

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Does your APC unit provide a clean sine wave or is it the typical stepped waveform using PWM?

 

1500 Watt unit with true sine wave, APC fans kick-on when I enter dense clouds ... my SimPit room has a 15Amp breaker ... I do run a 2nd PC on the same circuit but that's only pulling about 300-350 Watt.

 

 

 


OT but I thought that whole pure sine wave vs stepped was a made up issue.

 

The answer depends on the PSU in the PC and quality of filters it uses.  A good quality PSU should be able to deal with a cheap stepped wave UPS.

 

Cheers, Rob.

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Agree, modern power supplies use switching technology and regulation that is superior to the early days with big power transformers and capacitors.

 

My DirecTV receiver/DVR unit does not have a very robust power supply, it needs rebooting anytime there is a wrinkle in the power that not even the microwave oven detects.  I've gone with the pure sine wave unit for that application.  I think Motorola makes those receivers, at least that's the level of quality LOL.

 

I've been around UPS power all my life both as a military communication engineer and later in petrochemical control systems among other things. They sure have improved.  Any investment of a couple thousand dollars in a computer and dozens of hours in configuring same should have a UPS.

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