touchdown84

P3Dv4 VRAM limit?

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Hi,
is there a maximum amount of VRAM the sim will use?
I'm asking because I can't get it to use more than 7-8GB (my GPU has 12GB VRAM) and I had some situations where I thought "why doesn't it have this in vram?" like when I flew over EGLL and when I looked back over my shoulder all airport buildings were textureless/black and it took a second to re-load the textures which were already there 10 seconds ago.

With TEXTURE_SIZE_EXP=10, LOD_RADIUS=14.500000, all Settings @max and ORBX-England I get to 7.3-7.8GB VRAM. I thought it might be because I only use 1080p, but even with DSR@4k the VRAM consumption did not change.

So could there be a limit, e.g. 8GB? (I never saw over 8GB VRAM usage...)

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I was wondering the same thing, but in my case it looks like my regular ram is capped at 8gb. 

John

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where do you put texture size exp 10 at in the config file?

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5 minutes ago, Patriot3810 said:

where do you put texture size exp 10 at in the config file?

Prepar3D.cfg:

[TERRAIN]
TEXTURE_SIZE_EXP=10

 

 

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Yeah 8 seems to be max to for me 2, tried texture_size 11 and 12 but just kills scenery.

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2 minutes ago, Zaros said:

Yeah 8 seems to be max to for me 2, tried texture_size 11 and 12 but just kills scenery.

Same for me, value above 10 loads no ground textures at all...

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What is the default texture size= XX ?

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8 minutes ago, Nyxx said:

What is the default texture size= XX ?

default texture size exp parameter is 8

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Perhaps another line in the config file somewhere which limits maximum VRAM usage because Rob Ainscough definitely stated he observed VRAM usage at nearly 11GB utilizing a value of 10 for the TEXTURE_SIZE_EXP setting.  

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Running TEXTURE_SIZE_EXP=10 and i've never gone above 7.4GB VRAM used. I've got 12GB to play with. No matter what setting i throw at it, it's not using more.

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49 minutes ago, Syonco said:

Running TEXTURE_SIZE_EXP=10 and i've never gone above 7.4GB VRAM used. I've got 12GB to play with. No matter what setting i throw at it, it's not using more.

And what exactly is bad about this? The less VRAM an application needs the better the performance. ;)

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1 minute ago, Farlis said:

And what exactly is bad about this? The less VRAM an application needs the better the performance. ;)

Nothing necessarily bad about it, just curious as it was said specifically when using the "TEXTURE_SIZE_EXP=10" you'd see 10GB+ of VRAM usage :)

 

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Here's  the section in Jordan King's video  that explains the Texture exponent:

 

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