Vegas 21 Preview window doesnt work when using 2 gpus.

JoeK wrote on 8/21/2023, 5:58 PM

I have 2 gpus, RTX 3060 12GB and RTX 3060 Ti 8GB and the CPU is AMD Ryzen 9 5950X 16-Core Processor (32 L)

I use the 12Gb for gaming and 8Gb for video editing since it's better option.

This is in a single tower build.

When I go to edit in Vegas and set it to use the Ti to edit video the preview window doesn't work.

I swap it to use the other GPU and the video preview works but when I open the FX menu and try to see the effects; the Preview window is frozen until I close it

When i disable the Ti everything works fine, when I disable the 12GB GPU every is broken.

I can enable both gpus [disable acceleration] and use the CPU but that would defeat the purpose end game.

Both Software and Drivers are latest.

Just seems like vegas refuses to work with in a multi gpu environment.

 

Vegas version is V21 Build 108

Windows is Windows 11 21H2 (OS Build 22000.1936)

Comments

RogerS wrote on 8/21/2023, 6:35 PM

Which GPU is the monitor plugged into?

JoeK wrote on 8/21/2023, 6:44 PM

Which GPU is the monitor plugged into?

I got 3 screens, 2 are plugged into the Ti and 1 plugged into the Non ti

RogerS wrote on 8/21/2023, 8:09 PM

Is VEGAS on the screens plugged in to the Ti?

JoeK wrote on 8/21/2023, 8:58 PM

Is VEGAS on the screens plugged in to the Ti?

Yes. I even have the vegas folder and it's other folders like the Mocha folders [works fine no issues] set in nvida control panel to launch on the Ti graphics when working in Vegas, It's like vegas is ignoring settings. For experiment, I unplugged my other screen and placed it into the Ti card and disabled my non ti card, and every worked again, I did the opposite aswell, take all my screens and put into non ti and disable ti card, all works well. Though as soon as I just move one monitor to my other card, vegas just gives up and decides to not work. I didn't have this issue with v19 or v20 It's only an issue for v21.

RogerS wrote on 8/21/2023, 9:37 PM

Thanks for confirming that. Hopefully the developers can take a look as I don't think there's anything users can do here.

RogerS wrote on 8/21/2023, 9:48 PM

Compatibility mode is for laptops with iGPUs.

fr0sty wrote on 8/21/2023, 10:19 PM

Even though the 3070ti is more powerful, VEGAS does better with more VRAM, so you're probably better off using the 12GB for vegas anyway.

Systems:

Desktop

AMD Ryzen 7 1800x 8 core 16 thread at stock speed

64GB 3000mhz DDR4

Geforce RTX 3090

Windows 10

Laptop:

ASUS Zenbook Pro Duo 32GB (9980HK CPU, RTX 2060 GPU, dual 4K touch screens, main one OLED HDR)

Howard-Vigorita wrote on 8/21/2023, 11:15 PM

@JoeK What dpi is set in Display prefs? I think multiple monitors require alternate high dpi. But I don't think Vegas will give you a way to select which gpu is used for Nvenc rendering if both are enabled in Windows device manager. However, the physical pcie slots you choose may influence the Vegas rendering default... watching Windows Task Manager charts after you swap the gpus around should reveal if that's the case. Also, if you select the 3070ti in Vegas video prefs, AI Fx processing will default to that too which, as @fr0sty points out, might not work as well with less vram.

RogerS wrote on 8/21/2023, 11:54 PM

Unless I'm misreading something these are two 3060s (one ti, one not) not a 3070ti.

JoeK wrote on 8/22/2023, 12:07 AM

Even though the 3070ti is more powerful, VEGAS does better with more VRAM, so you're probably better off using the 12GB for vegas anyway.

It's two 3060 One 12gb and 1 8GB which is Ti

@JoeK What dpi is set in Display prefs? I think multiple monitors require alternate high dpi. But I don't think Vegas will give you a way to select which gpu is used for Nvenc rendering if both are enabled in Windows device manager. However, the physical pcie slots you choose may influence the Vegas rendering default... watching Windows Task Manager charts after you swap the gpus around should reveal if that's the case. Also, if you select the 3070ti in Vegas video prefs, AI Fx processing will default to that too which, as @fr0sty points out, might not work as well with less vram.

The DPI is set to 100% for all screens, all 3 screens are 2560x1600, as for the GPU slot order, Ti is first slot and non ti is second slot, img: https://i.imgur.com/GKHFVc7.png

Howard-Vigorita wrote on 8/22/2023, 11:06 AM

@JoeK Sorry, I wasn't clear. I was referring to trying this Vegas setting if you use multiple monitors:

JoeK wrote on 8/31/2023, 12:17 AM

@JoeK Sorry, I wasn't clear. I was referring to trying this Vegas setting if you Quote use multiple monitors:

Sorry for not replying, this issue didn't fix it.

I just ended up doing a work around, I have put all my screens plugged into the 3060 Ti card, and swapped the placement inside my tower so the Ti is in slot 1 with the screens and my normal 3060 card is in slot 2 no screens.

That being said, I just use windows settings to force my games to use Slot 2 GPU and leave Vegas at default settings.

I still don't know what the primary issue is, and bug is still present