What does enabling iGPU get me?

Rich Parry wrote on 5/31/2023, 5:35 PM

Just completed assembling a PC with i9-13900K CPU that has a iGPU. I’m using a dedicated GPX 1080 Ti card to drive two 27” monitors, the iGPU is disabled. I don’t see what enabling the iGPU gets me. Reading posts here on the forum, I believe there is an advantage to enabling the iGPU but don’t understand why. If I enable the iGPU in the BIOS, what will change and how will I know?

Thanks,

Rich

Comments

RogerS wrote on 5/31/2023, 6:49 PM

You get Intel QSV decoding and encoding. Find it in preferences file io and in some render templates.

Rich Parry wrote on 5/31/2023, 7:41 PM

@RogerS, thanks for response, perhaps I can bother you a little more. Does that mean with iGPU enabled, Intel QSV decoding and encoding gets me faster "previews" and "renders"? And if I want to quantify the advantage of turning on the iGPU, I can measure "preview rates" and "render durations" with and without iGPU enabled, right? Depending on your response, I'll do the test and share it with the forum.

Thanks again,

RogerS wrote on 5/31/2023, 8:11 PM

Yes, there should be speed benefits for encoding. For decoding possibly faster, possibly the same but it accelerates more media formats than NVDEC in VEGAS and should be more stable.

j-v wrote on 6/1/2023, 6:24 AM

@Rich Parry
Default settings on laptop with disabled iGPU:

and default settings with IGPU enabled:

3POINT wrote on 6/1/2023, 6:59 AM

Just completed assembling a PC with i9-13900K CPU that has a iGPU. I’m using a dedicated GPX 1080 Ti card to drive two 27” monitors, the iGPU is disabled. I don’t see what enabling the iGPU gets me.

When using two monitors, QSV rendering will not be available.

Howard-Vigorita wrote on 6/3/2023, 5:43 PM

When using two monitors, QSV rendering will not be available.

@3POINT Just tested that on all my systems and the only one that lost qsv with dual monitors was my laptop with Nvidia 3060 plus Intel IrisXe. But I was able to correct that by assigning the Iris/Xe to vp20 in Windows/System/Display/Graphics.

All my machines except the laptop have Amd gpus and I plugged a Samsung 55" tv into the motherboard hdmi, and alternately, into an hdmi port on an Arc secondary gpu with the same results. To test the laptop, I used it's built-in hdmi-out connector. In all machines I enabled Alternate HighDPI settings in Vegas display preferences.

@Rich Parry I find the biggest advantage to enabling the Intel igpu is that it adds accelerated decoding of 8-bit avc and up to 10-bit hevc, which lets everything else using the cpu and main gpu run quicker by virtue of load-splitting. Additionally, Intel decoding quality using legacy-hevc in Vegas measured with fmpeg comes up substantially better than just about anything in all 3 of it's metrics. QSV and Nvenc are pretty decent but MainConcept has everything beat when it comes to rendering quality. The best of all worlds for me is to shoot nothing but hevc, use Intel w/legacy-hevc decoding, and deliver MainConcept final renders.

I wouldn't recommend disabling the Intel igpu unless you were replacing it with something better. Like an Arc. In which case you might do better with a Xeon or a Ryzen.