Should I upgrade my CPU or GPU to improve Render speed on V15?

marcos-s wrote on 12/25/2017, 6:22 AM

I'm looking to improve both Render & Preview speed on Vegas15.
Most of my projects are HD 1080-60i, ~15min long. I'm currently rendering with the MAGIX AVC MP4 encoder.

Current setup:
- CPU: i7 4790 (3.60GHZ)
- Mobo: Maximus Hero VII w/ 32GB Ram.
- GPU: Nvidia GT 730 (NVENC isnt available for this specific model, GF108)

So, right now I'm looking at those two options:
1) Getting a GTX 1070 to get NVENC and a better GPU card.
2) Replacing my CPU & MB for Maximus Hero X with a i7 8700K

Option 2 is 20% more expensive, and I'll also have to fully reinstall OS etc as I'm replacing the Mobo.
But I'm willing to go for it if it's for a really better Render & Preview performance.

Any advice? I've read a lot of great info about this on the Forum, but while it seems that option 2 would give me better overall results, V15 changed things and not having NVENC seems to make a really big difference. So I'm confused here.

PS. I'll also take other suggestions obviously :)

Thanks a lot!


 

Comments

marcos-s wrote on 12/25/2017, 6:56 AM

Preview depends also for a great part on projecttype and sourcefiles and those are?
Renderspeed depends on more than GPU and CPU, what about a choosen rendertemplate?
 

Most of my projects are HD 1080-60i, ~15min long. I'm currently rendering with the MAGIX AVC MP4 encoder.
* edited the OP to include that info, thanks

marcos-s wrote on 12/25/2017, 8:10 PM

Look at my specs for laptop and desktop in my signature.
Both render FHD or 4K projects with the Magix AVC NVENC or Intel QSV 7 times faster compared to Magix AVC Mainconcept.

Preview with 4K and 2 or 3 effects is no problem with Intell on laptop and NVidia on desktop.
 

Seems great! But you have both a better CPU and a better GPU card than mine haha.
If you had to downgrade your current setup, would you downgrade the GPU (losing NVENC) or the CPU? :)

My dilemma right now is which one should I go for, GPU os CPU, as I can only upgrade one of them.

GJeffrey wrote on 12/25/2017, 9:08 PM

I upgraded my GPU from a gtx570 to a gtx1070ti (keeping the same 3930k cpu).

Rendering with nvenc is approximately 5 times faster than cpu.

Timeline preview is good now using gpu (no problem @full best with 3 to 4 fx) . Before i had to disable it to get better performance.

I mostly edit 1080-50i and 2.7k-30p.

Former user wrote on 12/26/2017, 3:29 AM

I upgraded my GPU from a gtx570 to a gtx1070ti (keeping the same 3930k cpu).

Rendering with nvenc is approximately 5 times faster than cpu.

Timeline preview is good now using gpu (no problem @full best with 3 to 4 fx) . Before i had to disable it to get better performance.

I mostly edit 1080-50i and 2.7k-30p.

5x faster? Were you using any filters/plugins?

If you just did a test with little to no video processing then that's not a true representation unless you just use vegas as a simple cut/paster or transcoder without any other form of visual manipulation. With vegas GPU processing always bottlenecks the rendering because vegas has such poor gpu utilisation. So because of the GPU video processing the CPU usually isn't anywhere near 100% during software rendering due to having to wait for GPU.

Software rending should not be 5x slower because Both rendering options have to wait the same amount of time for GPU processing. It shouldn't matter how much faster the NVENC rendering codec over software encode due to the same GPU processing delay.