CPU Rendering and Not GPU

Grouwdi wrote on 8/18/2025, 10:57 AM

I have looked over posts on these threads here and no matter what you do, Vegas 18 Pro refuses to use a GPU. I feel like these developers of the application did nothing by lie to users. I even saw one person say they resolved the issue by moving to Vegas 19. (Vegas is really a scam?)

I have all settings set accordingly but my CPU does all the leg work while my 4090 sits at 8%.

Please be honest: is the Vegas GPU Rendering really a scam?

Comments

NickHope wrote on 8/18/2025, 5:40 PM

...I have all settings set accordingly...

Please detail those settings, using this post as a guide.

john_dennis wrote on 8/18/2025, 7:35 PM

@Grouwdi said: "Please be honest: is the Vegas GPU Rendering really a scam?"

It's nada tooma!

Now, I'm going to restore my system image, continue running Vegas Pro 22-250 and forget we talked.

Gid wrote on 8/18/2025, 8:58 PM

@john_dennis ? I want some of whatever you're smoking 👍

Technically both of these are the CPU....

Vegas Pro 18 - 22
Vegas Pro/Post 19
Boris Continuum & Sapphire, 
Silhouette Standalone + Plugin, 
Mocha Pro Standalone + Plugin, 
Boris Optics,
NewBlue TotalFX
Desktop PC Microsoft Windows 10 Pro - 64-Bit
ASUS PRO WS WRX80E-SAGE SE WIFI AMD Motherboard
AMD Ryzen Threadripper PRO 3975WX 3.5GHz 32 Core
Corsair iCUE H150i RGB PRO XT 360mm All-in-One Liquid CPU Cooler
RAM 256GB ( 8x Micron 32GB (1x 32GB) 2666MHz DDR4 RAM )
2x Western Digital Black SN850 2TB M.2-2280 SSD, 7000MB/s Read, 5100MB/s Write
(programs on one, project files on the other)
Graphics MSI GeForce RTX 3090 SUPRIM X 24GB OC GPU
ASUS ROG Thor 1200W Semi-Modular 80+ Platinum PSU 
Fractal Design Define 7 XL Dark TG Case with 3 Fans
Dell SE3223Q 31.5 Inch 4K UHD (3840x2160) Monitor, 60Hz, & an Acer 24" monitor.

At the moment my filming is done with a Samsung Galaxy S23 Ultra 5G & a GoPro Hero11 Black

I've been a Joiner/Carpenter for 40yrs, apprentice trained time served, I don't have an apprentice of my own so to share my knowledge I put videos on YouTube.

YouTube videos - https://www.youtube.com/c/Gidjoiner

 

EricLNZ wrote on 8/18/2025, 9:23 PM

@Gid You've probably opened a can of worms.

@john_dennis Who, or what, is "nada tooma" and where do he, she or they fit in? A Bing search brought up lots of names. Google Translate says it's Estonian language and translates to "to bring nothing". I'm confused.

john_dennis wrote on 8/18/2025, 9:50 PM

@EricLNZ 

@Gid Technically, the UHD770 video adapter on the i9-13900K is an area of silicon on the cpu die. If it didn’t have a video adapter, it would be an i9-13900kf.

EricLNZ wrote on 8/19/2025, 4:41 AM

After doing some research I came to the conclusion that physically CPU and GPU are the same but are used for different processing purposes.

RogerS wrote on 8/19/2025, 9:23 AM

To the original poster, did you try MagixAVC with NVENC? It did work with older NVIDIA GPUS, not sure if old software and the newer GPUs work well together.

Anyway I manage two benchmarks (see my signature) and some users like me compare Mainconcept, NVENC and QSV and the times are different so the scam theory is invalid.

Howard-Vigorita wrote on 8/19/2025, 12:36 PM

@Grouwdi The gpu selected in video prefs controls timeline and gpu-enabled fx processing. It's also impacted by where you plug the hdmi cable... the 4090 will be marked Optimal if the hdmi is plugged into it. The gpu selected in i/o controls decoding. If you have an Intel processor with an igpu, that is selected by default by vp18. The specific render template selected controls rendering by gpu or cpu. If you do not have an Intel igpu, you won't see QSV as a render template, only Nvenc (4090) and MainConcept (CPU).

Here's a screen shot of my 11900k/4090 system with task manager doing an Nvenc render of the 4k Sample Project with vp18. It shouldn't be doing both Nvenc & Qsv decoding at the same time... later versions of Vegas fix that bug and run much faster.