vMix is known to work with the "normal" RTX driver. You could try that and see if it's any better. I would expect the GPU to work with it in any case.

I got vmix working on my MSI Creator laptop. I purchased a Sonnet Echo Express SE III Thunderbolt 3 Expansion Chassis and installed my Blackmagic Design DeckLink Mini Recorder 4K HDMI camera interface. In the Nvidia Control Panel admin I select Manage 3D settings. Once there I click Program Settings and the Select a Program to Customize and scroll down to c:\program files (x86)\vmix\vmix64.exe

Below that dropdown is option 2 Select Preferred Graphics Processor for this program where I choose High-Performance NVIDIA processor.

I also purchased an HDMI to USB 3.1 adaptor to connect my monitor to the Sonnet Echo so my monitor is working off of the Thunderbolt port.

Now I can run vmix with no problems as long as after it boots up on the laptop I drag it over to the external monitor. If I leave it on the laptop screen it will crass in seconds.

But now my problem is vmix does not recognize the laptop screen as the second screen so I can't use the Fullscreen option. So I have just ordered another monitor. A 24" HD Dell with a USB C to Display Port cable. I have two USB C ports on this laptop so I will see if that works. If not I will have to purchase another card for my Sonnet Echo to interface the second monitor but I hope not.

I'll let you know what happens...

Johnny B

PS the fan on the Sonnet Echo Express was WAY TOO LOUD. I don't know how they measured the sound levels (db). Maybe it was from another room. In any event I opened up the box and unplugged the fan. I left the box open to help dissipate the heat. Zero noise. I called Sonnet and they were like...what?... that's crazy. I said I do not want any bloody fan noise 3 feet away from my microphone when doing an interview. Problem solved...