GPU question

[Oleg_Budeanu]

Hi everyone.
My company is looking into upgrading my workstation to render projects in Vantage.
We were thinking about A5000 but I was very much surprised that even though it has 48gb of memory - it is almost 3x slower than 4090. I understand that speed is not about the memory, but I was expecting it to have at least the same speed in the benchmark.
I think we are OK with 24gb, but I've seen that 2x 4090's are not working in SLI mode? So there is no way to join their computing power? I know about NVLink being removed in favor of the high-end pro GPU's, but what about SLI?
Thanks

[Muhammed_Hamed]

Hey Oleg,

The RTX 4090 doesn't support NVLink or SLI mode. Chaos Vantage itself doesn't need SLI or NVlink to combine 2 GPUs, if you have 2x 3090 or 2x 4090s they will work just fine with Chaos Vantage. That being said, you shouldn't expect 2x performance out of using 2 GPUs with Vantage.. one RTX 4090 is more than enough
You can add a second card like 4060 ti 16 GB to connect to your monitors and to use with 3Ds Max, so all the memory on your 4090 is dedicated to Chaos Vantage

On another note, SLI is required for Geforce cards like the RTX 3090 and 3090 ti to be able to use NVLink in Nvidia control panel. This will allow 2 pairs of GPUs to pool GPU memory on supported applications like V-Ray GPU(Vantage doesn't support memory pooling)

About Quadro RTX cards, the RTX A5000 has 24 GB of GPU memory not 48 GB. You will only have 24 GB of GPU memory in Chaos Vantage
About the performance of Quadro RTX cards, it is expected that the A5000 is a lot slower than the RTX 4090. The A5000 is based on the GA102 chip, found on the RTX 3080 and RTX 3090.. it will have close performance to these GPUs
The RTX 4090 is based on the AD102 chip, which is a newer and more advanced architecture hence you get +2x the performance compared to the A5000 or the RTX 3090

Let me know if you have more questions,

Best,
Muhammed

[Oleg_Budeanu]

Hey Oleg,

The RTX 4090 doesn't support NVLink or SLI mode. Chaos Vantage itself doesn't need SLI or NVlink to combine 2 GPUs, if you have 2x 3090 or 2x 4090s they will work just fine with Chaos Vantage. That being said, you shouldn't expect 2x performance out of using 2 GPUs with Vantage.. one RTX 4090 is more than enough
You can add a second card like 4060 ti 16 GB to connect to your monitors and to use with 3Ds Max, so all the memory on your 4090 is dedicated to Chaos Vantage

On another note, SLI is required for Geforce cards like the RTX 3090 and 3090 ti to be able to use NVLink in Nvidia control panel. This will allow 2 pairs of GPUs to pool GPU memory on supported applications like V-Ray GPU(Vantage doesn't support memory pooling)

About Quadro RTX cards, the RTX A5000 has 24 GB of GPU memory not 48 GB. You will only have 24 GB of GPU memory in Chaos Vantage
About the performance of Quadro RTX cards, it is expected that the A5000 is a lot slower than the RTX 4090. The A5000 is based on the GA102 chip, found on the RTX 3080 and RTX 3090.. it will have close performance to these GPUs
The RTX 4090 is based on the AD102 chip, which is a newer and more advanced architecture hence you get +2x the performance compared to the A5000 or the RTX 3090

Let me know if you have more questions,

Best,
Muhammed

Hi Muhammed, thanks for taking your time and replying on a weekend, really appreciate it!
I am sorry for my mistake - I was talking about A6000 with 48gb of RAM.
Currently, I have 3080Ti but we are hitting memory limits, as I am targeting to render exterior panoramas, and that's not only high resolution, but a lot of vegetation. I believe that can fit in 4090s 24gb of RAM.
Thanks for your detailed reply.
I have a couple of questions.
1. Do I understand correctly, that Vantage does not support any type of memory pooling? I mean even if I have NVLink-compatible cards joined - does it not use combined memory?
2. On the VRayBenchmark I see GPU tests - should I expect the same behavior in terms of speed in Vantage? Can I use those tests to understand the speed relation to different GPUs and the number of GPUs ?
Thanks !

[Muhammed_Hamed]

1. Do I understand correctly, that Vantage does not support any type of memory pooling? I mean even if I have NVLink-compatible cards joined - does it not use combined memory?

Hi Oleg,

Correct, even if you have 2x A6000 with the physical NVlink bridge between them. You are still limited to 48 GB of VRAM of a single card in Vantage
That being said, 24 GB is plenty. You have dynamic textures which reduces the memory of textures considerably, plus the fact that Vantage is very efficient with geometry(having million of triangles in the scene)

2. On the VRayBenchmark I see GPU tests - should I expect the same behavior in terms of speed in Vantage? Can I use those tests to understand the speed relation to different GPUs and the number of GPUs ?
Thanks !

For performance yes, for stacking multiple GPUs no
Vantage supports up to 2 GPUs only, and the scaling with 2 GPUs is not linear specially with high-end GPUs like the RTX 4090.. you will not be getting 2x the performance with 2x 4090s
One 4090 is more than enough in my view, and if you really want to add a second GPU pick something small for viewport performance so that Windows and other applications don't take memory from your 4090

Best,
Muhammed

[Oleg_Budeanu]

Hi Oleg,

Correct, even if you have 2x A6000 with the physical NVlink bridge between them. You are still limited to 48 GB of VRAM of a single card in Vantage
That being said, 24 GB is plenty. You have dynamic textures which reduces the memory of textures considerably, plus the fact that Vantage is very efficient with geometry(having million of triangles in the scene)



For performance yes, for stacking multiple GPUs no
Vantage supports up to 2 GPUs only, and the scaling with 2 GPUs is not linear specially with high-end GPUs like the RTX 4090.. you will not be getting 2x the performance with 2x 4090s
One 4090 is more than enough in my view, and if you really want to add a second GPU pick something small for viewport performance so that Windows and other applications don't take memory from your 4090

Best,
Muhammed

Thanks, Muhammed.
Yes, I already have 3080Ti, which will act as the main GPU.

[luisgamino2]

Hi Muhhamed and Oleg Budeano

Yesterday i finally took the decition and bought a total new RTX A5000.

Im really happy with this purchase, im going to left 1 2080ti just to plug my 4k asus monitor and left the RTX A5000 just for rendering and vray gpu.


Muhhamed since you have a lot of experience here with vray gpu and nvidea gpus

Can you share your experience here about Quadro cards

For example how the ECC memory works with vray gpu?
i read too that Quadro cards almost do not fail, they are more reliable and more precise than geforce cards

How the new drivers for the quadro RTX A5000 helps in vray gpu for sketchup?, i read that quadro cards have drivers that are special for software and not for gaming.

I read too that Quadro cards have less consumation power RTX A5000 only takes 230 watts

The Quadro gpus seems to handle better intensive tasks
You can use it day and night.

This is the first time in all my live that i bought a Quadro gpu.

Sometime ago i posted about it and i someone just told me is a bit slower than the Rtx 3090.

Thanks Muhhamed

[Muhammed_Hamed]

Hey Luis,

Quadro cards have more GPU memory than the corresponding Geforce cards. This is the biggest selling point for these GPUs
With 24 GB of GPU memory you will be able to render bigger projects on your machine. This GPU is also a lot faster than your 2080ti

Another advantage of Quadro cards are the certified drivers, it is less likely to have issues. You still need to use the recommended driver for V-Ray GPU

Best,
Muhammed

[luisgamino2]

Hi Muhhamed

I have been reading about the Quadro gpus cards, i have found a lot of things.

1 first it does not take so much energy power as the geforce does. For example the RTX 3090 it takes 370 watts, that is really a lot while the RTX A5000 only takes 230 watts.

The 4090 takes 450 watts that is insane!!!

The 5090 how much watts is going to take...550 wats???!!!

I had read people buying source power for 1200 watts or 1500 watts...That is insane...How much light do you pay for month???

Quadros are much better in this aspect.

2 second the Quadro gpu cards are not so big they are a lot smaller than the geforce.

The 3090 and the 4090 are gigantic zize for a gpu, sometimes you can not use 2 in the same tower.

I read too that the Quadro gpu cards are for proffesional, since it has more things for architecs and enginers, like the ECC memory and drivers for software not for gaming.

Quadro are for more extensive and intensive use, days and nights rendering without issues.
Since they dont get too Hot, i believe they are better gpus for rendering.

So as conclusion im really happy Muhhamed, thank god i chose the RTX A5000 and not the geforce Rtx 3090

The price was cheaper than a new rtx 3090 asus Rog strix.

Also Muhhamed dont forget that we are living in a world with a lot heavy tempertures.

The summer and the spring is really hot here in Mexico

Right now doing a render with the 2 2080 ti in spring and summer is insane, i have to turn on always the air conditional, increasing the ticket price when i have to pay the light of the house

Is much better the Quadro gpus cards.
Totally happy with this purchase.

[visualtracing__]

on benchmark scores they give it the much slower square rtx. then if someone also uses a 1500W PSU it doesn't mean that you are always consuming that power.
The 4090 consumes more than the 5000 RTX but there is certainly a reason for this, and this is given by performance. I think that Chaos Vantage behaves like a game and the Fps values are as important as the rendering calculation and now the top on the market, in the gaming field, is the 4090.
and let's not forget the 16384 cuda cores of the 4090 against the 8100 of the rtx a5000

[luisgamino2]

The RTX 4090 is much faster than the RTX A5000 because you are comparing one new architecture to another old architecture.

Rtx 4090 is from Ada loveace series newer than the Rtx a5000 from ampere

Ampere was like 3 years ago while ada love Ace is from 1 year ago.

You can not compare both, because is different architecture.

rtx 4090 and quadro rtx ada 6000 you are going to get kind of same results.

rtx 3090 and rtx a5000 is very similar in perfomance they are from same family ampere.

Both have 24 gb of vram.

Both do a great job in rendering.

What im talking about visual tracing is the heat and how much power the geforce cards takes.

Just look at this visual tracing.

rtx 3090 370 watts 24gb

Rtx a5000 230 wats 24gb

Rtx 4090 450 wats 24 gb

Rtx ada 5000 and ada 6000 230 wats and 270 wats 32 gb and 48 gb

RTX 3090 85C-90C°

RTX A5000 60C°-65C°

RTX 4090 85C°-90C°

RTX ADA 5000 OR 6000 60C°-65C°

My 2 2080 ti produces between 84C° to 86C°...Both

This is so much heat, i dont need that kind of tempertures.

I dont want to fry a food in my workstation, i dont want to turn on always the Air conditional.

Guess what visual tracing...With just a 800 watts power source i can use 1 2080 ti for my 4k monitor and RTX A5000 just for my rendering...pure 24 gb of vram just for geometry and textures, i dont waste any kind of vram.

Also the Quadro cards can fit in any kind of tower...while the geforce needs a really big tower to plug 2 big cards.

Long Life to Quadro cards...They are not expensive as a lot of People think.


Thank to the low power consumation of the quadro cards you can use it 24/7 with out issues... The heat really does not nothing.

I had read people with 4090 they melt the 12 pin conector...Suffering because the cables do not support so much power.

How much power is going to need the upcoming rtx 5090...600 watts... jajajajajaja i dont need that stuff.

That is for sure

Visual tracing just look here the 2 2080 ti with nv link...They are almost touching each other just 5 milimeters.

With the new Rtx A5000 im going to realease some space and a lot of heat.

I cant buy the Rtx 3090 and use at the same time 1 2080ti

They do not fit in my tower...But the Quadro rtx a5000 does!!!


Look the size of these Quadro Rtx A5000...Just perfect...the 2080 ti is a monster if you compare the size...3090 is bigger than the 2080 ti...While the quadro rtx a5000 is pure elegant and a lot smaller than a 3090...

Forgot to mention my Rtx A5000 was cheaper than the Geforce Rtx 3090...Long live to Quadro cards!!!

Less power, less heat and almost the same perfomance than his brother the rtx 3090.

[visualtracing__]

Hi "luisgamino2" mine was just a consideration relating to the question of "Oleg_Budeanu" about a workstation to perform rendering on Vantage.
That said, both cards render on Vantage but the 4090 is more powerful for all the regions you describe and consequently performs faster previews and rendering than the Rtx a5000. Let's not forget that the Quadro RTX A5000 is much noisier than the 4090, as having only one fan it also reaches 3500rpm. There are various videos that demonstrate this

[luisgamino2]

Hi visual tracing

I havent tested vantage, i really dont have time.

Vray gpu is great, i can achieve a really nice renders with vray gpu

For me visual tracing since i dont have dead lines is better the vram.

If the render takes 30 min more or 30 minutes less it is fine for me.

The Rtx 4090 is very fast in test, i dont have a big power supply and also i dont have a big tower.

So the only option was the Rtx A5000.

It is a great option since it has 24gb of vram, just perfect to keep increasing the house and render faster than with my 2 2080 ti.

I use vray gpu to show clients the house and spaces so i convinced them to build in real life.

I havent installed the rtx a5000, im going to increase the size of the house if vray gpu crash im going to install the rtx a5000.

Having issues with the vram it is a horrible experience with vray gpu...Sometimes it crashes so Hard that the software become really unstable and i have to turn off the workstation.

Also since it is a medium size gpu i can keep 1 2080ti...This is just perfect.

If i have to tell you the truth visual tracing i was hoping so much this gpu with 24 gb of vram, less issues and a lot faster render times.

Playing with vray gpu in interactive mode is going to be a pleasure

I hope vray gpu team take notes and see how important is vray gpu for architecs and designers and bring more features for us...Like caustics and diffuse roughness.


Cheers visual tracing

[it_dept2]

Hi Muhammad,
with regards to the GPU, I have a A5000 with 24 GB as you mentioned, I'm noticing that only 6 GBs or 8.5 GBs are used even though the FPS is not high, even though the rest of the memory show as available, could there be a memory limit imposed on Vantage?

[Muhammed_Hamed]

Hi Muhammad,
with regards to the GPU, I have a A5000 with 24 GB as you mentioned, I'm noticing that only 6 GBs or 8.5 GBs are used even though the FPS is not high, even though the rest of the memory show as available, could there be a memory limit imposed on Vantage?

Hi it_dept2

There are no GPU memory limitations on Vantage, it is just that your scene is only using 6 GB of Geometry and textures.
I think your GPU is working just fine, if you wanna make sure it is. See my post about GPU monitoring here, open GPU-Z while using Vantage
Your GPU usage should hit 100% and GPU power draw should be above 200 watts

Best,
Muhammed