Asus Zenbook Pro Duo UX-582Hs user here, 32 GB Ram, 4tb WD Black SN850X, Nvidia GTX 3080 8GB usere here.
I just recently upgraded to Vegas Pro 20 and am pretty impressed . . . (except for style transfer which presently has very underwhelmed with results).
I made some short videos using the Video For Windows format over the holidays that had minimal effects and they rendered in no time flat. These videos had 24 bit audio and 60fps but were only 2 mins long, they ended up being about 20GB and rendered in minutes flat.
Yesterday - today, I rendered a 20+ min video with loads of video effects (Colorization being the only Advanced one) in what is supposedly a more efficient format - MAGIX AVC/AAC - using the NVENC (admittedly uncompressed and Constant Bit Rate - because I am hoping to load them on instagram etc). Because of the target, the audio is only 16 bit - 256k and the video was 30fps. It took over 18 hours to render. The final video is 2.86 GB. . .
Before, i started the rendering I had tried the different codecs (intel, mainconcept) and aborted because they also gave me long rendering time estimates in the menu. I had figured since my computer is pretty fast that at some point the rendering would accelerate. I also tried to switch my File I/O and video preferences to the NVIDIA GPU before render and it prompted me to restart, but when I did restart Intel QSV, etc. was still chosen. I'm wondering what's going on with Vegas and what I'm missing here. These are the types of rendering times (perhaps longer) I had when I was trying to run Vegas Pro 17 on a 16Gb Intel i7 Toshiba laptop from 2013.
The final product looks good, but it seems like I'm missing something here. I'm kinda wondering if I fried my GPU running Stable Diffusion on it so much recently. . .