I'm looking at 3080Ti v 3090.  Right now I have to stop flights and typically adjust Volumentric clouds down from Ultra to High, rarely to Medium, to cope with TRANSIENT demand on VRAM & GPU utilization.  Typically this is on the ground, but sometimes flying thru clouds, and often w/ this it's GPU utlization that gets hammered more than VRAM use when in the air, and often both GPU and VRAM while on the ground.  My 2070 Super has 8Gb and most often I'm not getting all that close to 8Gb in use, but definitely do enough to have me stop once or twice per flight to adjust.  

So my question, if I put a 12Gb 3080Ti in, will VRAM use just go up to the new total amount, and really leave me in a similar place I am now minus a bunch of $$? or if I kept all sliders exactly the same as I do now w/ 8Gb VRAM should I then easily be able to handle clouds at ULTRA in particular?  My main goal is not to have to stop and adjust sliders.  I'm happy w/ the other sliders where there are now.  Again, often even 8Gb is fine for clouds usually VRAM gets maxed only in busier airports.

It appears total GPU perf in Passmark the 3080Ti is about 47% faster, plus has 50% more VRAM, over my 2070 Super.

Edited July 13, 20214 yr by Noel

20 minutes ago, Noel said:

I'm looking at 3080Ti v 3090.  Right now I have to stop flights and typically adjust Volumentric clouds down from Ultra to High, rarely to Medium, to cope with TRANSIENT demand on VRAM & GPU utilization.  Typically this is on the ground, but sometimes flying thru clouds, and often w/ this it's GPU utlization that gets hammered more than VRAM use when in the air, and often both GPU and VRAM while on the ground.  My 2070 Super has 8Gb and most often I'm not getting all that close to 8Gb in use, but definitely do enough to have me stop once or twice per flight to adjust.  

So my question, if I put a 12Gb 3080Ti in, will VRAM use just go up to the new total amount, and really leave me in a similar place I am now minus a bunch of $$? or if I kept all sliders exactly the same as I do now w/ 8Gb VRAM should I then easily be able to handle clouds at ULTRA in particular?  My main goal is not to have to stop and adjust sliders.  I'm happy w/ the other sliders where there are now.  Again, often even 8Gb is fine for clouds usually VRAM gets maxed only in busier airports.

It appears total GPU perf in Passmark the 3080Ti is about 47% faster, plus has 50% more VRAM, over my 2070 Super.

While it would be nice to have a shiny new 3080Ti with 12Gb of VRAM (I want one as well! ), it might be unwise to dive in before the sim update on the 27th, as they showed quite a drop in both the RAM and VRAM usage on the twitch feed, and not just a little bit!

Edited July 13, 20214 yr by bobcat999

13 minutes ago, bobcat999 said:

While it would be nice to have a shiny new 3080Ti with 12Gb of VRAM (I want one as well! ), it might be unwise to dive in before the sim update on the 27th, as they showed quite a drop in both the RAM and VRAM usage on the twitch feed, and not just a little bit!

In some ways that makes the case certainly for 3080Ti v 3090.  I found one of the brand I'm interested in for a price I can cope with so it's very tempting right now!!!!!!!!!!!!  I just don't want to discover there is something odd about VRAM availabilty and how the sim behaves.  Plus, I am a strong believer in matched parts.  I think my CPU is fine for RTX30 series, less so perhaps for 40 series next year.  And I am a buy and hold user.  I still am using my now 7 y/o GTX Titan in another PC and it still works great!  If I end up going 3080Ti I will try to sell the 2070 Super for a few hundred as able.

Here is the classic scenario:  all was well until we get fairly close to our destination, which today is La Guardia.  Note the 97% GPU utilization, and 7796 of VRAM in use.  It would certainly seem like 47% more GPU plus 50% more VRAM should handle this easily, but sometimes behavior doesn't match up linear expecation.

Edited July 13, 20214 yr by Noel

1 minute ago, Noel said:

In some ways that makes the case certainly for 3080Ti v 3090.  I found one of the brand I'm interested in for a price I can cope with so it's very tempting right now!!!!!!!!!!!!  I just don't want to discover there is something odd about VRAM availabilty and how the sim behaves.

I understand.  I had a stressful day yesterday and nearly pulled the trigger on a 3080Ti to try to cheer myself up, but I will wait now for the update, and also for the prices to drop some more.

Even with the upcoming optimisations, I would love to be able to run MSFS at 4k native with a mix of high / ultra settings, and a nice new 3080 series would maybe allow this with the optimisations, and be good for for other uses / games as well (Cyberpunk etc.).  

7 minutes ago, bobcat999 said:

I understand.  I had a stressful day yesterday and nearly pulled the trigger on a 3080Ti to try to cheer myself up, but I will wait now for the update, and also for the prices to drop some more.

Even with the upcoming optimisations, I would love to be able to run MSFS at 4k native with a mix of high / ultra settings, and a nice new 3080 series would maybe allow this with the optimisations, and be good for for other uses / games as well (Cyberpunk etc.).  

I've watched Newegg Shuffle for many weeks now, and it irks me 99% of the time it's for combo purchases, and prices really are approaching eBay scalpers with the rare single item offering there.  I think I'll probably do it as wisdom isn't my strong suit!!!!!!!!!!!  If it's still available I think I will compromise w/ your wisdom and buy it but not open it until after the update.

Cheers!

Edited July 13, 20214 yr by Noel

Yes it will. I have seen 18-19gigs of Vram usage with my 3090. But as others have stated with the soon to be here update vram consumption should be going down soon.

From what I have read about the performance enhancements due late July, it seems as if it transfers more load to the GPU while boosting FPS.

If that is correct then I may have a problem or get no benefit from the enhancements as my current set up runs 'GPU Limited" all the time & uses all the 6GB of VRAM available.

Or are they also doing something that will relieve the pressure on the GPU?

T45

27 minutes ago, Noel said:

I've watched Newegg Shuffle for many weeks now, and it irks me 99% of the time it's for combo purchases, and prices really are approaching eBay scalpers with the rare single item offering there.  I think I'll probably do it as wisdom isn't my strong suit!!!!!!!!!!!  If it's still available I think I will compromise w/ your wisdom and buy it but not open it until after the update.

Cheers!

If you really want one, and you are happy with the price and can afford it, then wisdom (for saving money) doesn't come into it, and it doesn't matter one jot about the performance update either - that will only be a bonus.   

For me, to buy one now would be a bit of a stretch, as much as I would like it!  

Edited July 13, 20214 yr by bobcat999

7 minutes ago, TurboKen said:

Yes it will. I have seen 18-19gigs of Vram usage with my 3090. But as others have stated with the soon to be here update vram consumption should be going down soon.

But, and it's a big one, does this have to do with changing sliders?  Right now I have a few on Ultra, many on High, LOD I will modulate according to flight plan, but RS is always at 100, and I'm at 1440p, vsync'd to 30Hz, and these are very significant factors.  So really my question was somewhat vaguely phrased and should have read:  does VRAM go up when sliders/settings are identical, and the less amount of 8Gb being the reference point?  Perhaps it may be a case of not really knowing where VRAM use would be, when limited to 8Gb, very hard to predict for me.

Edited July 13, 20214 yr by Noel

21 minutes ago, Noel said:

prices really are approaching eBay scalpers with the rare single item offering there. 

I detest the bundling as well.  Now, many of those Newegg single items are being sold through Newegg but not by Newegg.  Confusing. Many from the Far East.  To weed them out click on the "Sold by Egghead" slider at the top of the left column.  Almost as bad as eBay.

27 minutes ago, Noel said:

But, and it's a big one, does this have to do with changing sliders?  Right now I have a few on Ultra, many on High, LOD I will modulate according to flight plan, but RS is always at 100.  So really my question was somewhat vaguely phrased and should have read:  does VRAM go up when sliders are identical, and the less amount of 8Gb being the reference point?

I would guess that some of the higher VRAM usage on the 24Gb 3090 is simply due to not clearing down (because it doesn't need to), rather than needing to use that amount for what is currently being displayed. 
So it would be almost like caching old data until it needs to flush for new data when running low.

My train of thought on this is that many 3080's with 10Gb cope well at similar settings.
A lot of people went for the 3090 originally due to the scare with higher VRAM usage in DX12 with P3D.
It appears the 24Gb is only really needed for video editing high resolution files etc. 
Of course, a 3090 owner who has spent a lot of money may not agree, and there will be some benefit, however slight.

Once again, if people want the best GPU and have the money, it doesn't matter.  Them being happy for buying the 3090 doesn't affect me.

Anyway, maybe a GPU buff can explain and give you your answer.  A few pop in occasionally!   My unknowledgeable opinion (gut feeling) is that 10 - 12 Gb should be alright at 4k and high / ultra settings. 
I say this because my old 1080Ti with 12 11Gb seems to cope well apart from it's old GPU and its processing speed.  With higher settings, I get gradual FPS drop rather than stutters / micro-pauses due to VRAM swapping etc. and the SU5 will only improve VRAM usage anyway.

Edited July 13, 20214 yr by bobcat999

2 minutes ago, bobcat999 said:

I would guess that some of the higher VRAM usage on the 24Gb 3090 is simply due to not clearing down (because it doesn't need to), rather than needing to use that amount for what is currently being displayed. 
So it would be almost like caching old data until it needs to flush for new data when running low.

My train of thought on this is that many 3080's with 10Gb cope well at similar settings.
A lot of people went for the 3090 originally due to the scare with higher VRAM usage in DX12 with P3D.
It appears the 24Gb is only really needed for video editing high resolution files etc. 
Of course, a 3090 owner who has spent a lot of money may not agree, and there will be some benefit, however slight.

Once again, if people want the best GPU and have the money, it doesn't matter.  Them being happy for buying the 3090 doesn't affect me.

anyway, maybe a GPU buff can explain and give you your answer.  A few pop in occasionally!   My unknowledgeable opinion (gut feeling) is that 10 - 12 Gb should be alright at 4k and high / ultra settings.  I say this becasue my old 1080Ti with 12 Gb seem to cope well apart from it's old GPU and its processing speed.  With higher settings, I get gradual FPS drop rather than stutters / micro-pauses due to VRAM swapping etc. and the SU5 will only improve VRAM usage anyway.

I see.  How often to you get to 12Gb in use?  Or perhaps that's the same question framed for 12Gb as you did for 24Gb.  What I do know is when my 8Gb gets maxed I am then unable to maintain the requisite 30fps necessary when vsync to 30Hz for that great smooth animation.

4 minutes ago, Noel said:

I see.  How often to you get to 12Gb in use?  Or perhaps that's the same question framed for 12Gb as you did for 24Gb.  What I do know is when my 8Gb gets maxed I am then unable to maintain the requisite 30fps necessary when vsync to 30Hz for that great smooth animation.

1080ti is an *11* GB vram card.   I run 4K / 80 scale and I don't max my vram.  I'm able to maintain 30/30 smoothness but admittedly I haven't had time to torture-test places like KORD or EGLL.  I don't quite run things on Ultra (some sliders are, but some are on "high").

The only time I've ever maxxed vram on that card was the time I intentionally tried to crash it -- loaded up LatinVFR KMIA and Leonardo Maddog and every slider maxxed in P3D 5.0.   I was able to crash the sim at the gate.   I haven't tried to do that in MSFS (yet) but I am just nefarious enough to do that.

Just now, Noel said:

I see.  How often to you get to 12Gb in use?  Or perhaps that's the same question framed for 12Gb as you did for 24Gb.  What I do know is when my 8Gb gets maxed I am then unable to maintain the requisite 30fps necessary when vsync to 30Hz for that great smooth animation.

I have never seen it maxed out at 4k 70% scaling (for me to hit a solid 30 fps), and with a mix of high / ultra settings.  I would have to check, but I seem to remember 8.5 to 9 Gb in use.

I see I never answered you question properly/directly..."does VRAM go up when sliders are identical, and the less amount of 8Gb being the reference point?"

I don't know the definitive answer to that other than some people have said it will take advantage of what is there.
So like I said above, it may not need to use 12Gb and only need 8Gb in a certain scenario. 
But if it doesn't need to flush out old data to make room, it may hang on to that data in VRAM in case it comes in useful again (cached) and only clear it out when it needs more room.

My RAM issue was similar.  When I had 16Gb it always used about 13 - 14Gb.  When I upgraded to 32GB, at the same settings, it now uses about 24 - 26Gb!  

9 minutes ago, Mace said:

1080ti is an *11* GB vram card.   I run 4K / 80 scale and I don't max my vram.  I'm able to maintain 30/30 smoothness but admittedly I haven't had time to torture-test places like KORD or EGLL.  I don't quite run things on Ultra (some sliders are, but some are on "high").

The only time I've ever maxxed vram on that card was the time I intentionally tried to crash it -- loaded up LatinVFR KMIA and Leonardo Maddog and every slider maxxed in P3D 5.0.   I was able to crash the sim at the gate.   I haven't tried to do that in MSFS (yet) but I am just nefarious enough to do that.

Thanks.  It is indeed 11 Gb.   I corrected my post.  I shuffled an extra Gb in for myself there!     It is surprising how well these old 1080Ti's are performing actually. 

Mine was good for 4k native 30 fps in FSX, but I used to get the dreaded 32-bit OOM!  Remember them?  They were the days! 

Edited July 13, 20214 yr by bobcat999