I have an RTX 3090 card and a 1080 Ti that I can add. Will these two work together or do I need to have an RTX type card?
Second part, do the RTX A4000 accelerator cards help in anyway vs getting a second RTX4090? Is there any reason to go with A4000 - A6000 cards over a second 4090?
Hi Raghib! Thank you for the great information! When we render an animation out, is it processed by the GPU or does it become CPU intensive at that point? I am considering getting a 32 core threadripper CPU and wasn;t 100% sure if CPU matters as much if path tracing happens on the GPU. Maybe a 24core CPU which saves $3k is fine,. We'd like to be able to save out animations as quickly as possible. we will probably get 64 or 128 GB ram.
Hi ,
For multi-GPU in Twinmotion, this will only work if you have two identical GPUs connected through NVLink, so connecting two different cards, like a 3090 and 1080, won't offer any benefits. NVLink is also only supported on a small subset of RTX capable cards, so you'll need to make sure the configuration is supported.
Additionally, multi-GPU only functions as a way to speed up Path Tracer render times. Normal raster rendering is not affected, and it won't increase the amount of GPU VRAM Twinmotion has available to use, so the use case for multi-GPU is very limited.
Regarding your follow-up about the RTX A4000-6000 cards, I believe it is a moot point if the plan is to use it in a multi-GPU setup for Twinmotion, but from my understanding, individually, the RTX A cards generally offer better VRAM capacities at the higher end than the GeForce RTX cards, but the GeForce cards offer better performance. The RTX 4090 is the most powerful card available at this time, so there is little reason to consider A4000 card, which has less VRAM and performance. You might want to consider an A 6000 for more VRAM, but in most cases, that wouldn't be necessary, at least for Twinmotion.
Best,
Raghib
Hi ,
Twinmotion is mainly GPU intensive for most of its rendering tasks, so whichever CPU you use shouldn't matter too much. Render will primarily tax your GPU first and foremost, followed by system RAM, then CPU.
Best,
Raghib
Hi ,
Since you asked about RTX 4090 I'll chime in, I don't believe NVLink is supported on any of the RTX 40 series cards and that RTX 3090 is the last one in the consumer grade cards that use it.
The usecase for NVLink in Twinmotion lessens a little bit in this regard.
I think Redshift renderer supports the features you are asking about in your first post, I do hope that Twinmotion devs have a look at that tech or if @Raghib Khan​ can pass this along and see if this can be achieved :)
I would love to see multi GPU support coming to Twinmotion eventually without NVLink.
Cheers