Skip to main content
C
Christian21959078ddrx
Participating Frequently
October 22, 2022
Question

RTX 4090 + Intel Arc A770?

  • October 22, 2022
  • 2 replies
  • 5563 views

Hi all,


Picked up an RTX 4090 and I noticed my render times improve ever so slightly over the 3090. 

However I've been wondering about the new Intel Arc GPUs. 

The reason is that most of the footage I'm editing is 8k h.265 10-bit 4:2:2, which Nvidia doesn't have hardware decoding for. Intel DOES. An Arc GPU would allow me to edit my source footage without proxies, which would save a ton of time. But NVENC is so fast when rendering to h.264. If I install both a 4090 and A770, is there a way to have the best of both worlds?

Can Premiere be told to use the A770 decoder for my source footage, and still use CUDA on my Nvidia card for rendering and effects? Or is Premiere limited to one GPU at a time?

This topic has been closed for replies.

2 replies

R
RjL190365
Legend
October 31, 2022

You will need an HEDT CPU-powered system to make the best use of two GPUs. Current mainstream CPUs still cannot run multiple GPUs at their maximum available bandwidth.

 

In your case, with a typical mainstream CPU-powered system, the RTX 4090's performance will suffer significantly for rendering if you also add the Intel Arc as a second GPU. This is because mainstream CPUs have only 16 total PCI-e lanes for GPU use, and extreme high-end GPUs now require the slot's full x16 bandwidth to perform meaningfully better than old-generation GPUs.

C
Christian21959078ddrxAuthor
Participating Frequently
November 4, 2022

Thanks for your reply. I am indeed on Threadripper. I guess I'm just not sure how to tell Premiere to use one GPU for edits and one for renders. Cheers.

R
RjL190365
Legend
November 5, 2022

By default, Premiere Pro uses both GPUs (with the Intel GPU having priority) for hardware H.264/HEVC decoding although you can manually select QuickSync (for the Intel GPU) or NVDEC (for the Nvidia GPU).

 

However, when it comes to rendering (not to be confused with hardware encoding), if you select CUDA, then the Nvidia GPU will be used for effects rendering - but if you select OpenCL, then only the Intel GPU will be used for effects rendering.

 

Hardware encoding to H.264 or HEVC will use only the Nvidia GPU when you have both GPUs installed.

    Peru Bob
    Community Expert
    Peru BobCommunity Expert
    Community Expert
    October 26, 2022

    Adobe Premiere Pro uses a single GPU during playback and multiple GPUs for other tasks such as Render In to Out and for export. CrossFire can be set up to present multiple GPUs as a single logical GPU and for that case, Adobe Premiere Pro treats it as a single GPU.

    In case multi-GPU (non-SLI or non-CrossFire) configuration is used, it's recommended to disable system or driver-based automated GPU/graphics switching functionality.

     

    from here:

    https://helpx.adobe.com/x-productkb/multi/gpu-acceleration-and-hardware-encoding.html

      C
      Christian21959078ddrxAuthor
      Participating Frequently
      October 31, 2022

      Thanks for this. Can you specify which GPU is used for each task? CrossFire is not an option because these would be two discrete GPU's from different vendors.

      Terms & ConditionsAccessibility statement
      Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices