Hello, since I upgraded my pc I did some testing with the 737NGX and Nvidia surround view. When flying in fair weather I'm stuck at 30fps nearly anywhere, even at addon airports with traffic. As soon as the weather gets nasty and I'm flying through heavy clouds, rain and fog my fps go down to the low teens. I cannot remember having such problems with my old ATI 6870, fps-wise there was a difference of maybe 3-5 fps from 0 to massive clouds. Cloud resolution is set to 2048 and I'm using REX Essentials. The question is, is this an issue with Nvidia?

No, just your settings for your video card such as AA and AF.

Okay I tried lowering AA and setting AF in FSX instead of NV inspector and it doesn't change anything at all, still getting horrific stutters :( btw cloud distance is set at 70nm..

Lowered the settings  to what?  Post your inspector settings.  I purchased a GTX770 for a friend prior to receiving my Titan.  

 

The 770 ran flawlessly in dense clouds with ASN and Rex direct.  I stuck with 1024 clouds, did not notice a big difference between 2048.   FPS averaged 60 but Iocked it at 30,  PMDG 777 

 

Edit - AA should be 'Off' in FSX, only use inspector

 

Regards

Thanks for the reply. I have set my NVI settings exactly as described in this guide http://www.simforums.com/forums/drivers-nv-inspector-fsxcfg-complete-guide_topic36586.html except that vertical sync is set to 1/2 refresh rate. AA is off in FSX.

 

EDIT: fps are limited in inspector too. I completely disabled AA but to no avail.

Do you use a weather engine?

Hi, yes I'm using REX Essentials for real time weather. I noticed that it can produce a huge amount of clouds and that's when the sim starts to stutter, today I noticed drops to 2 fps. Using a heavy weather scenario results in the same mess, low fps and stutters like hell.

Did your ATI card run 3 screens? What resolution are you running at?  Something seems very wrong here, your card shouldn't be breaking a sweat. 

 

Your system has more grunt then mine, it must be down to your settings.  It took me a little while to get things smooth, I had to test a few drivers but now I am on the latest.

My guess is that you are injecting a s**t load of clouds, on a high resolution, at high AA settings, or something to that effect.

 

I have a pretty decent system myself, but high res cloud textured of about 10 layers will bring it to its knees.

ps, are u using the highmemfix tweak and a correct affinity mask?

Did your ATI card run 3 screens? What resolution are you running at?  Something seems very wrong here, your card shouldn't be breaking a sweat. 

 

Your system has more grunt then mine, it must be down to your settings.  It took me a little while to get things smooth, I had to test a few drivers but now I am on the latest.

 

It ran 2 screens at 3980x1080 (bezel corrected) and heavy clouds vs. fine weather made a difference of perhaps 3fps. Now the resolution is at 5980x1080. I am also on the latest driver but the problem has also been there with other driver releases.

 

My guess is that you are injecting a s**t load of clouds, on a high resolution, at high AA settings, or something to that effect.

 

I have a pretty decent system myself, but high res cloud textured of about 10 layers will bring it to its knees.

ps, are u using the highmemfix tweak and a correct affinity mask?

 

I don't know how many clouds REX is injecting but it can't be that bad since their range is only set to 70nm. AA is set at 4xMS + 2xSS as described in Nick's guide. Honestly there's no difference between this setting and 0 AA. The highmemfix is set and affinitymask is at 84 for HT. Already tried with HT off but that changes barely anything.

Have you tried completely deleting the FSX profile from Inspector and testing again, to be absolutely sure there isn't a bad setting in the profile?

Have you tried completely deleting the FSX profile from Inspector and testing again, to be absolutely sure there isn't a bad setting in the profile?

 

Yes just tried that, restored NVI settings to default, fired up FSX, still the same. I am always testing at an addon airport where I'm normally between 25-30fps, they are at 20-24 when finished loading the PMDG NGX at first but panning around or moving the aircraft they drop below 10 sometimes and the stuttering is horrible.

Yes just tried that, restored NVI settings to default, fired up FSX, still the same. I am always testing at an addon airport where I'm normally between 25-30fps, they are at 20-24 when finished loading the PMDG NGX at first but panning around or moving the aircraft they drop below 10 sometimes and the stuttering is horrible.

 

I thought you were  having issues with clouds more than anything else. Getting into PMDG + complex airport addons + traffic is another matter entirely, and I would expect frame rates like that with a triple monitor setup.

I thought you were having issues with clouds more than anything else. Getting into PMDG + complex airport addons + traffic is another matter entirely, and I would expect frame rates like that with a triple monitor setup.

It only becomes a problem when there are clouds, otherwise performance is fine. I can't see why my performance should suffer as with my old system and much weaker gpu clouds didn't hurt it that much.

Ok guys I think I've got it. After searching for a while in the fsx.cfg file I noticed there was an entry missing: TextureMaxLoad=30. Added this to the [Display] section, loaded the NGX at a gate in a heavy thunderstorm and BOOM, back to 30fps. I have no clue why this cfg entry was not there but until now it seems it has resolved the issues I had.