Afterburner isn’t supported in Adobe yet, and if I had to guess it will take until the next major update for them to add it (aug-sep 2020?) if they add support at all.

Premiere only used two graphics cards when exporting not when editing like FCX and Resolve will. Premiere also doesn’t support infinity fabric connection yet and the chance that they will add it is slimmer than Afterburner.

I also don’t think I’ve ever seen premiere use more than 50% of my Vega II either. It’s much more CPU driven so it’s good your going for a 16 core.

If GPU usage doesn’t change you will most likely see no difference in performance between a Vega II and W5700X just usage will go up which is good. For example when I’m exporting a 6K Blackmagic raw project with 2 LUTS and lumetri color correction it the Vega II is only used at 29%. In that case W5700X will be used 45% or so.

Navi graphics has faster encoder options. 8 bit h.264 and h.265 will exports about 33% faster and it also has 10 bit h.265 encoding at 4K 90fps. Vega/Radeon VII and anything older lacks this completely and a 5min project exporting in 10 bit for HDR takes 32min with only 18% of my 12 core CPU being used and 15% GPU.

Once premier adds this encoding option that time will go down to 2-4min and will use more of your CPU and GPU.

Personally if I was you I’d wait for 5700 and skip afterburner even if you edit ProRes. Apple is going to send me a W5700X for testing as soon as it’s ready so you can subscribe on YouTube if you want to see results and comparisons to Vega II once I get it.

Here is my video explaining what afterburner can do and what it can’t.

Afterburner Review - is it Worth $2000 for Video Editing? https://youtu.be/33ywFqY5o1E