H.264 encoding not using all cores

[MassNerd]

Got my new 16 core 3950X up and running and was excited to export/encoding my first project with Premiere Elements 14 (I use this even though I own 2018 because it's the last version to support Blu-ray authoring).

Sadly, H.264 exporting only appears to use a quarter the threads this processor can offer.  MPEG export uses them all.  Any fix for this? Or do  the newer version improve multicore support for H.264? 

[Peru Bob]

Even Premiere Pro is not able to take full advantage of more than 8 or 12 cores.

Is that 16 cores plus hyperthreading?

What are the rest of the specs of that beast?

[MassNerd]

Yes, to hyperthreading/SMT! It's fun to look at the logical processor view in Windows Task Manager and see 32 CPU graphs 🙂

I've got 32GB of DDR4 running at 3733CL16, Samsung 970 Pro M.2 512GB for OS and Apps, Adata XPG SX8200 1TB for Video files/photos.  AMD 5700XT GPU for gaming. Seasonic Prime Titanium 750W PSU powering it all. It's a beast all right!

[Peru Bob]

With that many cores, you really want at least 64 GB RAM, maybe even 128 GB.

If you don't have a certain amount of RAM per core, the system can be unbalanced and actually slow down the processor.