What hardware can reduce the time between clicking render and the render actually starting?

[akashi1]

Ok so I have decent hardware (8700 + RTX your 3060) but I do a lot of design iteration and I usually click render, wait to see 10 seconds past light cache to see some result and then stop the render to further improve the design. Interactive would technically speed things us, but I often can't see small and important details in interactive mode. If I am doing a final production rendering, it usually won't matter much if the rendering takes 5 minutes or 10 minutes, but when I want to quickly see a change I made, I hate the pause where everything needs to get loaded to the GPU. I could experience this pause hundreds of times per session. Would a CPU with more cores help? Higher clock speed? Faster VRAM? Maybe I should get like two 3090s and use interactive more often... Thanks for reading!

[Muhammed_Hamed]

when I want to quickly see a change I made, I hate the pause where everything needs to get loaded to the GPU. I could experience this pause hundreds of times per session. Would a CPU with more cores help? Higher clock speed? Faster VRAM? Maybe I should get like two 3090s and use interactive more often

Hello!

Do you use Vray CPU or GPU for your rendering?
Having a CPU with good single-threaded performance is very helpful in both cases, the 5950X could boost above 5 GHz on one or 2 cores. this will have a big impact on starting/pausing your render
Your CPU scores around 1200 in Cinebench R23 single-threaded test, and the 5950X scores around 1700
It is not just about frequency, the 5950X uses Zen 3 architecture, it is an impressive peace of tech

You will need a good board for this CPU, like MSI X570 Tomahawk or Asus X570 Crosshair 7 Dark Hero. I don't recommend entry level Motherboards in this case

If you use GPU rendering, it is recommended to have one video card for your monitors and viewport performance. And a second Video card dedicated only to GPU rendering
You can add a 3080 to your existing setup, and use it for your GPU rendering. And leave the 3060 for viewport performance(in which you connect your monitors)

For my personal setup I have a 3080 for my GPU rendering, and a 1660 Super for my viewport and monitors. This machine uses a 5900X which boosts up to 4.9 GHz.. the IPR is very fast to start/pause, it makes lighting and look dev much easier.
https://www.youtube.com/watch?v=pktqZd4GM4A

There might be other factors, if your CPU/GPU thermal throttles or if you have something running in the background for example or if it is an issue with your scene, you get the idea
If you have more questions let me know

wait to see 10 seconds past light cache to see some result and then stop the render to further improve the design

If you have very high LC subdivs, it might take longer to calculate. For GPU IPR I usually always use the default of 1000
I don't know what kind of work you do, but I really recommend using the IPR for your look-dev, this is how Vray is intended to be used, Vray's IPR is very fast.. On my 3 machines here, the IPR is always better/faster than production rendering for look-dev
I honestly don't think I can work without an IPR..

Best,
Muhammed