Mixed GPU systems

SnarfConsortium wrote on 8/26/2025, 9:06 AM

Is anyone still using a intel arc card in their system for use with Vegas22? The last time I ran a dual GPU setup was back on Vegas 20-21 but had to remove the extra GPU for an integrated capture device.

I no longer need the device and have been wanting to reintegrate my a380 into my system, but looking over the forums I am seeing fairly bad performance from V22 and dual GPU setups that want to use the ARC for hardware AV1. But, those posts were from last year.

Has anyone had better performance with V22 and ARC cards or would I be better off just sticking to my primary RTX 2080ti for rendering?

Comments

johnny-s wrote on 8/26/2025, 11:16 AM

@SnarfConsortium

I use intel gpu with Nvidia to assist with 422 10 bit. See my signature, PC 2.

Howard-Vigorita wrote on 8/26/2025, 12:28 PM

@SnarfConsortium Yes. I still have an a380 in my 11900k system along with an Nvidia 4090 and an Amd 6900xt. Also have one in a 9900k system along with an Amd Radeon7. I use the a380's for decoding with older Vegas versions. But mid-vp21, Vegas redesigned to run faster with timeline, fx, and decoder processing all in the same gpu. So I only use them in newer Vegas releases for qsv rendering. But great decoding in Resolve Studio and ffmpeg, however. Which both also do high performance qsv hyper-rendering, or whatever Intel calls it these days. I also have an a770 that at some point I'll be dropping into a new build along side something else... probably a 5090. Vegas is fine with dual gpus as long as they're not from the same vendor. I find I have to disable slower igpus otherwise Vegas always picks them for qsv rendering.

The arcs can decode av1, so that might be a plus. But Vegas still renders av1 with just the cpu. If you use Voukoder however, that will render with an Arc.

andyrpsmith wrote on 8/26/2025, 12:30 PM

Here is the Nvidia encode/decode matrix

https://developer.nvidia.com/video-encode-and-decode-gpu-support-matrix-new

RogerS wrote on 8/26/2025, 7:57 PM

You can see Arc performance with Fx heavy projects in my signature- it underperforms. I have a 2080 Super and would rather just use it for decoding, encoding and Fx than my Intel iGPU at this point as it's faster. The only exception is with 10-bit 422 HEVC where VEGAS automatically invokes the iGPU and it works well.

Howard-Vigorita wrote on 9/1/2025, 12:13 PM

Fwiw, I got the absolute best, smooth, and creamy display performance doing 4k 4:2:0 hevc multicam cuts plugged into an Intel a770 set to both video and i/o decoder. And audio mixing was fine too. But not so much with video FX in the picture. At the moment, however, the a770 is on the shelf.

jimingo-1 wrote on 9/2/2025, 11:14 AM

I have an AMD Radeon RX 6900 XT & an Intel Arc A770 installed and use both with Vegas 22. The Arc completely destroys the AMD if editing with 422 HEVC and is pretty much on par with everything else. I would get rid of the 6900 XT but I can't because of the Intel memory leak bug when rendering in 32 bit. Vegas still can't render to 32 bit while using Intel. For 8 bit, it works fine.