Better PC but longer Render Times?

Forum|Forum|2 years ago
April 23, 2023
5 replies
1204 views

Hi everyone.

So I upgraded my PC from an i7, 16 GB of RAM and a 1070Ti to an AMD i9 with 64GB RAM and a RTX4080. I rebuilt my preset for my YouTube Videos with the same media, same rendering settings and everything else as well exactly as it was before.

How is it possible that my new Beast of a Computer takes 40 Minutes to render a video of ~30 Minutes, whereas my former PC could do it in about 20 - 25 Minutes? I really can't seem to find a solution for it and it is frustrating to see, that a PC that should be a beast in nearly every aspect (and it is regarding everything else) kinda shuts down at rendering. I already tried enabling or disabling the Hardware Acceleration within the render settings, but to no avail.

Anybody know what I could try more?

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Correct answer RjL190365

Which generation i7 did you upgrade from?

Second, what is your source media (or more specifically, the source media that you worked with)?

If H.264, then it would be Intel's Quick Sync in play (assuming that you have the integrated on-CPU Intel UHD Graphics enabled). AMD CPUs like your Ryzen 9 have either no integrated GPU at all or one that doesn't work well at all with Premiere Pro. Hence, Premiere Pro on an AMD CPU-powered system will fall back to NVDEC, which still doesn't perform as well as Intel Quick Sync at decoding H.264 material.

And I get it that you've changed systems due to your previous Intel CPU already being in legacy support, and will soon go EOSL. And once that Intel CPU gets closer to its EOSL date, Adobe will completely drop support for that CPU in a future version release.

For the record, had you tried putting your old GTX 1070 Ti into your new AMD build, then it would have performed even worse (slower) than it currently does.

R

RjL190365

Legend

Also, were you using the exact same version and point release of Premiere Pro on both PCs?

Version 23.3 (the latest and current non-Beta release) changed the CUDA acceleration, making it perform noticeably slower than with earlier releases of Premiere Pro. OpenCL (Windows) and Metal (Mac) GPU acceleration are not affected by this performance degradation.

R

RjL190365Correct answer

Legend

Which generation i7 did you upgrade from?

Second, what is your source media (or more specifically, the source media that you worked with)?

If H.264, then it would be Intel's Quick Sync in play (assuming that you have the integrated on-CPU Intel UHD Graphics enabled). AMD CPUs like your Ryzen 9 have either no integrated GPU at all or one that doesn't work well at all with Premiere Pro. Hence, Premiere Pro on an AMD CPU-powered system will fall back to NVDEC, which still doesn't perform as well as Intel Quick Sync at decoding H.264 material.

And I get it that you've changed systems due to your previous Intel CPU already being in legacy support, and will soon go EOSL. And once that Intel CPU gets closer to its EOSL date, Adobe will completely drop support for that CPU in a future version release.

For the record, had you tried putting your old GTX 1070 Ti into your new AMD build, then it would have performed even worse (slower) than it currently does.

Peru Bob

Community Expert

What are the hard drives in each machine?

F

FaciteAuthor

Participant

So I used the same external 10TB Hardrive but moved it now to my new 1TB SSD after my problem. So this would be another improvement over the old PC. Still, rendering takes at least the same amount of time or even longer. But with my new rig I kind of thought I could expect much shorter rendering times.

R Neil Haugen

Legend

What are the comparison specs of those two CPUs for handling H.264 encodes/decodes? That could easily be the problem, as not all CPUs and GPUs have the proper hardwareparts for doing that computation and have to slog through it mathematically.

And it can be surprising what CPUs/GPUs can handle this well, and which ones can't.

@RjL190365 is the user here with best data on this.

Neil

Everyone's mileage always varies ...