VRAY5 Win 10 Hybrid rendering- CPU or GPU or Both?

[vanderart]

Hello Gang. I am new here but I am not a new Vray user. I have a decent running win 10 PC.
Dual processor

Processor Intel(R) Xeon(R) CPU E5-2687W v3 @ 3.10GHz, 3101 Mhz, 10 Core(s), 20 Logical Processor(s)
Processor Intel(R) Xeon(R) CPU E5-2687W v3 @ 3.10GHz, 3101 Mhz, 10 Core(s), 20 Logical Processor(s)

Installed Physical Memory (RAM) 208 GB
Total Physical Memory 208 GB
Available Physical Memory 194 GB
Total Virtual Memory 235 GB
Available Virtual Memory 216 GB

Not the fastest, but fast enough. Plenty of Ram.
I also have a decent video card - Nvidia Quadro RTX 8000

My question is this: apart from having a render farm, what is the best way to perform IPR rendering and utilize as much of the video card, cpu's and ram ( if it comes into play ) as possible for IPR rendering? Is this where Hybrid rendering comes in? If so, how is that setup?

Thanks for any advice!

JV

[Karol.Osinski]

Hi vanderart !
Speaking from my experience, having rtx 3090 and Threadripper 3950wx at disposal. I almost always use only GPU in RTX mode during the IPR rendering.

Before I used both CPU and GPU in CUDA mode but the difference in speed wasn't significant enough in my case to recompense having my entire system slowed down because of CPU usage, terrible viewport performance. It also crashed much more often then RTX only.

However, since you have a dual setup. You could easily tick off one of your cpus and enjoy smooth system.

On the other hand RTX drivers got much better now and your card can probably do really well on its own.

The best way to find out is to run some tests, while looking at number rays per pixel displayed in super handy Stats tab inside VFB.


Regards,
Karol

[Karol.Osinski]

And no, RAM utilization won't matter if you are using GPU rendering.
(unless you wanna try out-of-core beta feature)

Although, your 48gb VRAM monster should be enough , unless you are working on some very big project.

[vanderart]

Thanks for your response.
ok, so how simple is it to set up RTX mode properly aside from selecting it in render settings? Is there a section in Maya's preferences where Vram has to be turned on?
lastly, the card RTX 800R's settings are set for all cudas , max performance power etc.
if you dont mind I would love to know how to set this up. I know my card is pretty powerful, but I am not sure I have it set up to use its full potential.
many thanks for any guidance

V

[mruiz79]

Just want to follow up in this subject.

I have a Ryzen 9 5950 with a RTX3090 and just tried to render only in RTX and is basically the same time as rendering in CUDA.

[Karol.Osinski]

Very simple, checking on RTX tick box is all you have to do. V-Ray will use all available VRAM automatically.

For CUDA mode, in order to see the difference between RTX (GPU only) and CUDA (CPU + GPU) performance, make sure that under V-Ray render selection devices list, everything is ticked.

regards,
Karol

[Karol.Osinski]

Just want to follow up in this subject.

I have a Ryzen 9 5950 with a RTX3090 and just tried to render only in RTX and is basically the same time as rendering in CUDA.

Yeah, I pretty much gave up on CUDA mode, it somehow seemed much more unstable...idk. MAYBE I could make use of out-of-core feature but this never worked well for me.

[Muhammed_Hamed]

Yeah, I pretty much gave up on CUDA mode, it somehow seemed much more unstable...idk. MAYBE I could make use of out-of-core feature but this never worked well for me.

Out of Core will work with RTX mode, should be available soon
And I agree with others here, use RTX mode for this configuration as your GPU is much faster than CPUs

Best,
Muhammed

[Karol.Osinski]

Can't wait to take our haviest scene ever and try it out with RTX haha!