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Anyone planning on getting the 3090 for VR?


kevman

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My understanding is that the application leaves some headroom for non-application system use. But the allocation that it has taken can run out.

 

Not sure about that as in certain 4K monitor scenarios, I see 11.1Gb being allocated.

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Yes, we are talking about allocated amounts. My point is I have never seen the full amount being allocated. Most scenarios are 7-8Gb. Why would the program ask for an amount less that what it needs?

 

From my old c programimg days efficiency or laziness...

 

It's often easier to do an upfront MALOC for everything that the code is going to use once than do so dynamically, I would often grab everything in memory that wasn't being used minus some arbitrary amount left over for other system functions, this is especially true in single use apps like games... Where you have to worry about other code playing you have to be a bit more careful.

 

Otherwise you can slow things down with additional MALOC or FREE's

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Maybe, but I have yet to see any VR scenario asking for more than 10Gb on my 2080Ti.

 

I’m regulary between 10.2 and 10.6 on my 2080ti in DCS

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For someone who has just upgraded a PC like me, and using a PCIE 3 motherboard I wonder if there will be a bandwidth bottleneck compared to the new PCIE 4?

 

 

That is good to hear, waiting for real world benchmarks now. :thumbup::music_whistling:

 

Just for clarity there is no functional difference

 

 

Interesting observation right at the start turn off SMT/Hyperthreading to improve perf.


Edited by speed-of-heat

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Here are some snips of my fpsVR, which Afterburner backs up. Again, I know it's allocated, not necessarily what is being used. I will also admit when I first ran at 1.2 PD the VRAM was "only" 10.3gb. This a quick jump into the F-16 Free Flight Caucasus mission. FWIW, the Hornet missions only tend to be 9.0 VRAM.

Settings are Steam resolution of 3412x2104, PD 1.2/1.5, no AA, High/High/512 textures.

12pd.PNG.cc0e7d496480514610a2897772990281.PNG

15pd.PNG.8eef154846c6200b96a70eb5c05b8f6f.PNG


Edited by Snake122

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From my old c programimg days efficiency or laziness...

 

It's often easier to do an upfront MALOC for everything that the code is going to use once than do so dynamically, I would often grab everything in memory that wasn't being used minus some arbitrary amount left over for other system functions, this is especially true in single use apps like games... Where you have to worry about other code playing you have to be a bit more careful.

 

Otherwise you can slow things down with additional MALOC or FREE's

 

I can understand being lazy and asking for too much, but I'm struggling to understand why it would be less.

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i would always want to leave room for "the unexcepted", set of system conditions that start to crowd the processor/memory or whatever, but that's me ... what i cant understand is how its allocating 11.1gb on your card ...unless that's just a rounding artefact

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Yes, we are talking about allocated amounts. My point is I have never seen the full amount being allocated. Most scenarios are 7-8Gb. Why would the program ask for an amount less that what it needs?

 

And if you had a 6GB card, you'd never see 6GB being allocated. You can't spend more than you have, otherwise things crash. Your system is going to leave headroom.

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Im most often above 10Gb VRAM when playing. For this I shot some screens, first being instant action F18 PG, only time below 10.0Gb VRAM. All screenshots with the same settings as I used for the last nine months. I might use slightly lower settings then the mean DCS player. I dont like stutter at all.

instant-PG.png

 

The rest is all above 10Gb(slight difference between GPU-Z and fpsVR), and it also shows the CPU time Vs GPU time, mostly about 30 to 50% higher GPU times then CPU times.

Yes, I need a 3090, both for the VRAM and to use the CPU overhead.

 

carrier4.png

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low-level.png

supercarrier.png


Edited by Gunnars Driver

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And if you had a 6GB card, you'd never see 6GB being allocated. You can't spend more than you have, otherwise things crash. Your system is going to leave headroom.

 

I think my point is being missed on this thread, so I'll repeat it.

 

There are suggestions here that VR grabs any VRAM it can get, and that a GPU card with loads of VRAM will resolve that issue and help performance. My point is that in most scenarios my DCS allocation is 7-8Gb VRAM with the occasional 10Gb on a 11Gb card, so the previous logic doesn't apply.

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i would always want to leave room for "the unexcepted", set of system conditions that start to crowd the processor/memory or whatever, but that's me ... what i cant understand is how its allocating 11.1gb on your card ...unless that's just a rounding artefact

 

Know what you mean, but see attached. Who knows?

vram.thumb.jpg.a9d3ce782067914f6829a0c90f5c16ec.jpg

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that's about 10.8Gb, 1024Mb in a Gb


Edited by speed-of-heat

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Know what you mean, but see attached. Who knows?

 

that's about 10.8Gb, 1024Mb in a Gb

 

If it is an answer to my comment on the difference between fpsvr and GPU-Z, I already did calculate Gb to Mb and it do not explain the difference. The reported VRAM usage differs by a couple of hundred Mb.

 

Anyway, Im always above 10Gb when gaming.

 

From the memory I saw stutter when using settings very close to 11Gb. My guess is with a swap to a 3080 I would have to lower the settings that affect the VRAM usage.

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I think my point is being missed on this thread, so I'll repeat it.

 

There are suggestions here that VR grabs any VRAM it can get, and that a GPU card with loads of VRAM will resolve that issue and help performance. My point is that in most scenarios my DCS allocation is 7-8Gb VRAM with the occasional 10Gb on a 11Gb card, so the previous logic doesn't apply.

 

And we are throwing out examples of DCS allocating more than 10gb in VR. While it may not be actual used, it gives me pause that some modules don't allocate over 10gb and some do with my and Gunnars Driver settings in VR.

 

Which to bring it back to the thread, makes me hesitant over the potential 3-5 year life of the card, that a 3080 10gb will have enough VRAM through the length of service life.

 

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And we are throwing out examples of DCS allocating more than 10gb in VR.

 

I have given up on this! I must go and enrol in a basic communications course!

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https://videocardz.com/newz/nvidia-geforce-rtx-3090-gaming-performance-review-leaks-out

 

5.8% at the low end and 11.5% at the high end over a 3080.

 

Save your money, wait for Navi or a 20GB 3080. You can get that same performance uplift by just overclocking a 3080.

 

If those numbers are accurate and it was at 4K resolution as I saw in one of the settings images, 10% for nearly double the price is a horrible statistic. Add to that the problems with size, power draw, and heat generation, I think I will take a pass.

 

What I am seriously considering is picking up a used 1080Ti now that the prices are down. I am running a stock 1080 and I think $350 for the extra VRAM and resulting VR performance of the 1080Ti might be worth it.

 

But I have racked up some overtime. In order to really improve my DCS World VR performance, I think I need to build a new PC first, then pick a new gpu. So, now I am waiting for the release of the new AMD CPUs to build a PC and by the time I have that sorted out, the gpu market should be a little more clear with the arrival of Big Navi and the stabilization in the supply/demand/pricing of the 30xx series.

 

So how long will I be in this "limbo" waiting to build a new PC with a modern gpu? Would $350 for a 1080Ti really be worth it when I can keep playing on my 1080 Duke until I have a new PC that won't be bottlenecking my gpu performance?

 

Used 2080 Ti is still > $800, so if the 3080 is ever actually available in quantity for $700 or $800, it is by far the best choice unless Big Navi steps up to the plate or a 3080 Ti surfaces.


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I think the difference between the 3090 and 3080 for general gaming will be similar to the Titan vs 2080Ti, I would not expect a hugh leap in fps. In 3Dmark benchmarks it is around 23% faster, so the number will be less in actual gaming.

 

Keep in mind that the titan is/was a $2499 card, and the 3090 which is supposedly a titan class or something close to that is $1000 cheaper. Clearly whenever you buy any top of the line equipment, it is never about the bang for bucks. Now in VR, any gain in fps even though how small it might be could result in significant gain in playability using the settings that we prefer.

 

For me, $1500 is a small price to pay and I’m ok with that for something that will be used daily. The 3080 or upcoming 3080Ti is of course a much better deal, but not all of us have the same needs or preferences.

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If it is an answer to my comment on the difference between fpsvr and GPU-Z, I already did calculate Gb to Mb and it do not explain the difference. The reported VRAM usage differs by a couple of hundred Mb.

 

Anyway, Im always above 10Gb when gaming.

 

From the memory I saw stutter when using settings very close to 11Gb. My guess is with a swap to a 3080 I would have to lower the settings that affect the VRAM usage.

 

nope i was taking about Iain's numbers

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Thank for posting that link FoxTwo. If true - we can't be sure what is actual and what is synthetic - then RIP. That really makes an additional £750 over and above the 3080 price, very, very hard to justify. At least for all but the most price insensitive.

 

And yes... the extra heat... RIP.

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For me, $1500 is a small price to pay and I’m ok with that for something that will be used daily. The 3080 or upcoming 3080Ti is of course a much better deal, but not all of us have the same needs or preferences.

 

I agree with this, i was ready to spend about that much on an old 2080ti, when i held because of the launch dates. Im still ready to spend it on a 3090.

 

The question, is it worth while holding for the 20Gb version, and as yet nobody has posted on actual VRAM experiences... it will be fascinating because if correct the 20gb will have the same number of Cuda cores as the 10Gb version an d we can actually do some perf comparisons.

 

But we dont really have any data on memory impact except with lower end cards in 2d. A Reverb is essentially a 4k+ display, so the 4k numbers are super relevant, but none of the games tested are running on DX11 (Rainbow 6 maybe) and none in VR ... we lack hard data ... so we have a bunch of people speculating...

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https://videocardz.com/newz/nvidia-geforce-rtx-3090-gaming-performance-review-leaks-out

 

5.8% at the low end and 11.5% at the high end over a 3080.

 

Save your money, wait for Navi or a 20GB 3080. You can get that same performance uplift by just overclocking a 3080.

 

No big surprise here, already told you guys. But hey, marketing is more powerful than those top-end cards. :pilotfly:

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I think my point is being missed on this thread, so I'll repeat it.

 

There are suggestions here that VR grabs any VRAM it can get, and that a GPU card with loads of VRAM will resolve that issue and help performance. My point is that in most scenarios my DCS allocation is 7-8Gb VRAM with the occasional 10Gb on a 11Gb card, so the previous logic doesn't apply.

 

That really doesn't have anything to do with my post here saying that I'm going for the 3090 based on my understanding that VR benefits from additional VRAM (I've seen it talked about elsewhere with real-world testing being done on DCS, with the Titan RTX). What this boils down to is that the 3090 isn't for you, and there's nothing wrong with that. Not trying to sell anybody on anything, just sticking to the subject. That subject was "Anyone planning on getting a 3090 for VR", which I answered with a simple "yes. I'm going to be notifed when they're available, and I want one because I think the VRAM will help." Hell, the thing hasn't even been released yet, so I may even change my mind. If I can swing it financially, I'd rather do that than get the 3080 and constantly be wondering "what if". If I'm wrong, so be it. Risk is part of the game with this stuff. :D


Edited by eaglecash867

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I think that you are correct: RTX features use GPU RAM. Currently most RTX titles only have a couple of effects active. But DOOM for example uses a number of RTX features and this is one of the reasons it hammers the memory hard.

 

24GB certainly future proofs you. But so would the 20GB version of the 3080. You don't want to wait and you want the extra 5-10% performance... that is fine.

 

There is also the consideration that Ampere's fps horsepower might still not be enough for too many RTX features to be on to a large extent at the same time... in that case the speed of the card would likely become an issue before 16GB (3070 16GB) or 20GB (3080 20GB) or 24GB (3090) became an issue.

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