Maxwell GPU

[nikand]

Anyone tried the new 970 or 980 with Vray?
Please shed some light on performance

[ANIMATIK_BT]

This guy tried with no success https://forums.geforce.com/default/t...r-gtx-970-980/

[savage309]

3.0 for Maya supports Maxwell.
For everything else (including VRay 2) ask the support guys for access to the nightlies (or wait until the next patch comes).

[vlado]

Please shed some light on performance

Performance is somewhere between a K5200 and a K6000

Best regards,
Vlado

[SaY]

Would it be possible to get a version with GTX980 support ? It doesn't work with max ver. 30008

[vlado]

Would it be possible to get a version with GTX980 support ? It doesn't work with max ver. 30008

It would be best to email us at support@chaosgroup.com - our support guys will help with that.

Best regards,
Vlado

[3LP]

Hey guys,
I just tried out the new Vray RT GPU rendering with LC, and woaw, it's just mind blowing.
For the same scene, with the same noise threshold, it renders in :
* 19min progressive render on my cpu (4930k OC 3.9Ghtz)
* 3min40 RT GPU on my GTX 780 Ti.

The shadows are a bit darker (more occlusion?) in RT compared to progressive, but I think it looks actually better.
For those who what to see the difference :
https://dl.dropboxusercontent.com/u/368267/gpu_1920.jpg
https://dl.dropboxusercontent.com/u/...ssive_1920.jpg

Basically, GPU more than 5 times quicker.

I'm wondering if I should not just sell my GTX and buy 4 of those new maxwell cards. This will just make rendering a dream. Under a min for HD rendering. I know, for the moment it's all white, but still!
I'm just wondering if I should go for those 970 or the 980.
If I calculate the pure processing power, it seems that the GTX 970 is at a ratio of 0.67 compared to a 980, but is also at a ratio of 0.54 in term of price.
So it seems that for the mony you get more power from the 970, but one can only put as much cards in a computer, so it might be more interesting to pay a bit extra and go for the big brother.

Does anyone has any real value results to be able to asses my speculations?

Thanks Chaosgroup for this huge advance in production you made with GPUs

Cheers guys
Stan

[Morbid Angel]

My take on the gpus is that they are very close to producing realistic results especially in architectural renderings. Your shadows are dark probably because the gpu default gi bounce is set to 3 or 5, so it does not bounce enough.

My only draw back on going and buying ton of hardware is that nvidia releases cards as often as autodesk releases new max service pack versions. So today this new card is amazing tomorrow its obsolete and a new card is at play.

I'm waiting for a time when like now with xeon cpu, one solid xeon cpu can perform for few years (in my case 5 years) on x5650 and only now I see machines which are substantially faster and it raises a question weather to buy a new system or wait some more.

[3LP]

I see what you mean, but you also need to keep in mind to stay connected to what's happening on the ground.
New hardware will always be better than old one, and you just don't see it as much with new CPU, true, but you need to stay in the game, unfortunatly.
Demands are going higher and execution time is tighter, and GPU is one way to make it easier to stay in the battle.
It's always feasabel to sell hardware and replace with new one, the difference will not be as much as if you go all new hardware every 5 years.
It is a bit of investment gradually, but I think the return on it might be worth it.
If GPU "is" production ready, (as it seems it become more and more) then it's really worth having a look into it. I agree that few years ago, it was a whole other discussion.

For the First Gi bounces, Both BF where at 3 who is the default setting, so I guess RT gpu and production should look the same way as there are the same number of bounces, I guess the coding is completely different so this might be the reason more than the settings themselves who are the same.
For the secondary GI bounce, both where LC (and both where on cpu so they should be the same)

Cheers

[vlado]

For the First Gi bounces, Both BF where at 3 who is the default setting, so I guess RT gpu and production should look the same way as there are the same number of bounces, I guess the coding is completely different so this might be the reason more than the settings themselves who are the same.

I need to verify this, it's odd that there is such a difference. How white is your material? Because of the light cache "retrace" option, there are several brute force GI bounces in corners; for the progressive renderer, they are by default up to 100, but for the GPU they are limited by its own GI option (3 by default). However this should really only have a visible effect if the materials are close to white.

Other than that, having the light cache on the GPU really changes everything. The GPU renderer is already advanced enough to handle most common materials used in archvis (and even more in the next versions) and the speed is unbeatable. I've been going through some of the Evermotion Archinteriors on a couple of GTX 980's, it's amazing what you get for 5 minutes of rendering.

Best regards,
Vlado

[Morbid Angel]

I see what you mean, but you also need to keep in mind to stay connected to what's happening on the ground.
New hardware will always be better than old one, and you just don't see it as much with new CPU, true, but you need to stay in the game, unfortunatly.
Demands are going higher and execution time is tighter, and GPU is one way to make it easier to stay in the battle.
It's always feasabel to sell hardware and replace with new one, the difference will not be as much as if you go all new hardware every 5 years.
It is a bit of investment gradually, but I think the return on it might be worth it.
If GPU "is" production ready, (as it seems it become more and more) then it's really worth having a look into it. I agree that few years ago, it was a whole other discussion.

For the First Gi bounces, Both BF where at 3 who is the default setting, so I guess RT gpu and production should look the same way as there are the same number of bounces, I guess the coding is completely different so this might be the reason more than the settings themselves who are the same.
For the secondary GI bounce, both where LC (and both where on cpu so they should be the same)

Cheers

I don't disagree. Problem for me is that I must use a wide array of plugins to complete various jobs, for example use of hair is one of them. Hair is just being supported now. Also use of many textures and geometry - limit in ram is another big issue which is often the case for me. Soon

[vlado]

FYI the darkening on the GPU is now fixed for the patch next week.

Best regards,
Vlado

[3LP]

Great news Vlado,

Thanks!

I can't stop myself of playing with RT now, damn you
I'm soo looking into new CG cards

[zeronove]

about this patch, is it already uploaded?
I can see only release Dec 10, 2014 version 3.10.01, is it that one?

[vlado]

about this patch, is it already uploaded? I can see only release Dec 10, 2014 version 3.10.01, is it that one?

The patch will be called 3.10.02; it's almost done - I will post here when it is available.

Best regards,
Vlado