If you have HW transcoding then any modern intel CPU with Quick Sync will handle it with no sweat. Software transcoding on the otherhand requires more CPU power.
The Streaming side of Plex is effectively a “Big Cloud Server”, shared to everyone of Plex’s customers, which Plex operates.
When you watch content from the Plex streaming service, it’s the same as if you watched content from a friend – All the work is done on that remote server.
Having HEVC output is a capability we’ve needed for a long time.
Chris and the whole team have done a great job getting everything in place to make it happen.
Those with HEVC-capable GPUs will now be able to output HEVC for the bitrate saving and non-tonemapped content for HDR10
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I have an i9-13900 with a UHD 770. Any idea how well the UHD 770’s QuickSync will handle the following in terms of concurrent sessions?
- 4K HDR Remux (i.e. 70 Mbps) transcoded to 4K HDR 40Mbps HEVC?
- 4K HDR 40 Mbps transcoded to 4K HDR 20Mbps HEVC?
I have an i9-12900 with UHD 770 graphics.
It does a great job with HEVC output (does NOT flinch)
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Sweet. I have no excuse to buy an Intel Arc GPU then, lol. I don’t think Intel Arc GPUs are officially supported, right?
Thanks again! I use Plex for travel and gym a lot. Preserving HDR and using less network bandwidth (because hotel/gym wifi can suck) will be very handy!
Correct. ARC GPUs are not officially supported (meaning: We do not ship drivers or libraries with the package). If you install all the drivers to make it VAAPI compatible (like AMD) then it will work for you in that VAAPI driver.
I have a Nvidia RTX2000 Ada Gen GPU.
I am a little partial to it but only because Nvidia does VC-1 transcoding better than Intel. (VC-1 is the codec for most of the blockbusters movies over the past few decades)
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Is this correct for this feature? 
“Hardware accelerated support for the H.265/HEVC codec starts with 6th generation Intel® Core™ processors.” LINK
Correct but there is a limitation:
6th gen Intel Core, AKA “SkyLake”, can only decode HEVC SDR (8-bit), These are the “-6xxx” CPUs
7th gen Intel Core, AKA “KabyLake”, can decode and encode HEVC HDR (10 bit). These are the “-7xxx” CPUs.
Generations above this all have HEVC HDR decode.
Some of the mobile/ NAS processors have limited capabilities
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Awesome. Thanks for the additional detail!
Any information about being able to use multiple GPUs for transcoding? Say I wanted to double my transcoding capacity, the most cost-effective way (for me) would be to add in an additional 1660. (also might need the extra oomph for 4k->4k HEVC transcoding, by limiting transcodes per GPU)
No. One GPU at a time.
The problem is not a technical one but an abuse one.
There are those out there who would buy a big xeon or ryzen board and stuff it full of GPU cards for nefarious reasons.
I have a P2200 in my main server and a RTX 2000 Ada in my desktop.
( I will swap these one day )
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Works perfectly, though. With a modern kernel there’s also not much you need to do in order for it to work out of the box.
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Great, just because there’s possibility for abuse, let’s destroy the fun for everyone. Could circumvent that with costly hardware, or just running multiple Plex instances. Or change software altogether 
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Does this include PGS subtitle burn in? An earlier comment in November said that when PGS is burned into a 4k HDR stream that’s transcoded to 4k 20mbps HDR HEVC stream with the burn in, the performance of the UHD 770 becomes nearly unusable as it can only do 1 of these transcodes, if that.
Has anyone tested 2 or 3 4K HDR-> 20/25mbps 4kHDR HEVC transcodes with PGS subtitle burn in on the UHD770 yet by any chance?
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Good to know. If the UHD 770 works great, I see no reason to pay for an Arc GPU and the electricity.
Is that the PlexPass date or more of a general release?
I’ve never seen the UHD 770 fail that miserably.
Did I misstate something?
FYI: CURRENTLY the players do have a 20 Mbps max. I expect that will change in very short order.
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The beauty of the ARC A380 is that it consumes no (detectable) electricity if there’s no monitor attached. And it supports more streams and has a modern encoder.
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At a minimum you will need an official pms 1.41.3 or new (I beleive public is at 1.41.4). Next wednesday we will flip a switch enabling hevc on those builds. That being said, it is hw only so you will need a plexpass.
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It was the comment by Schmitzke here:
I just wanted to check if this was still the case as I know most of my family is the type to put subtitles on no matter what which means if they transcode 4khdr to 4khdr hevc then I’m assuming my system (13600k (UHD770), 96GBRAM (80GB RAM transcoding drive) may not be able to keep up beyond 1 or 2 4k hdr to 4khdr hevc streams according to that previous post unless there was an optimization made since then that has improved this scenario? Just checking! I don’t doubt your comment, but just wanted to be specifically sure!
