# Plex 4k hevc transcoding issues
**URL:** https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797
**Category:** Plex Media Server
**Tags:** server-windows
**Created:** [February 26, 2021, 1:38am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797 "2021-02-26T01:38:03Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@adoteq](https://forums.plex.tv/u/adoteq)
#### Post date: [February 26, 2021, 1:38am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797/1 "2021-02-26T01:38:04Z")
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Hi.
I want to know why this server is continuesly buffering with 4k non hdr movie(using GT1030 & dual socket e5-2450l v1), while only 12% cpu usage and 12% gpu usage? If I go 4k hdr + tonemapping things buffer about the same, but more cpu usage. 
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### Author:  [@adoteq](https://forums.plex.tv/u/adoteq)
#### Post date: [February 26, 2021, 2:54am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797/2 "2021-02-26T02:54:52Z")
I am basically trying to decode using gt1030, and encode using GT710. But I Tried using gt1030 + cpu encoding aswell
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### Author:  [@CaptainRedHat](https://forums.plex.tv/u/CaptainRedHat)
#### Post date: [February 26, 2021, 4:13am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797/3 "2021-02-26T04:13:39Z")
Well it really depends on exactly what formats you’re trying to convert from and to. NVENC on Kepler GPUS (like the GT710) has limited support for encoding H.264 and no support for H.265 (HEVC). Your GT1030 doesn’t have any NVENC encoders at all.
The GT1030 does support decoding (NVDEC), but it only supports H.265 HEVC with 4:2:0 Chroma, whatever that means. lol.
I’ve been in the same boat with trying to transcode 4K content on an AMD FX-6300. I thought adding my old GTX 660 for transcoding would help, but it didn’t. As far as I can tell, none of the older Nvidia GPUS have really good support for encoding and decoding 4k until you get to the Turing-based chips like the GTX1650 and newer.
> **[Nvidia NVENC](https://en.wikipedia.org/wiki/Nvidia_NVENC)**
>
> NVIDIA NVENC (short for NVIDIA Encoder) is a feature in Nvidia graphics cards that performs video encoding, offloading this compute-intensive task from the CPU to a dedicated part of the GPU. It was introduced with the Kepler-based GeForce 600 series in March 2012.
> The encoder is supported in many livestreaming and recording programs, such as Wirecast, Open Broadcaster Software (OBS) and Bandicam, as well as video editing apps, such as Adobe Premiere Pro or DaVinci Resolve. It also works with S...
> **[Nvidia NVDEC](https://en.wikipedia.org/wiki/Nvidia_NVDEC)**
>
> Nvidia NVDEC (formerly known as NVCUVID) is a feature in its graphics cards that performs video decoding, offloading this compute-intensive task from the CPU.
> It is accompanied by NVENC for video encoding in Nvidia's Video Codec SDK.
> NVDEC can offload video decoding to full fixed-function decoding hardware (Nvidia PureVideo), or (partially) decode via CUDA software running on the GPU, if fixed-function hardware is not available.
> Depending on the GPU architecture, the following codecs are suppo...
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### Author:  [@adoteq](https://forums.plex.tv/u/adoteq)
#### Post date: [February 26, 2021, 5:17am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797/4 "2021-02-26T05:17:25Z")
I was simply trying to decode h265 4k hdr 4.2.0 (using GT 1030) to 1080p h264 8mbps(using either the cpu or gt710 which succesfully transcoded 1 4k h264 stream of a movie on its own Both dec and enc.)
To clarify, I had same issue in past with 8th gen i5 quick sync, and with the GTX 1050.
Those didn’t work either
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### Author:  [@adoteq](https://forums.plex.tv/u/adoteq)
#### Post date: [February 28, 2021, 3:23am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797/5 "2021-02-28T03:23:14Z")
Swapped out the GT1030, now I am getting this on localhost
An error occurred trying to play “Fast & Furious Presents: Hobbs & Shaw”.
Error code: s1001 (Network)[Plex Media Server Logs\_2021-02-28\_04-32-03.zip](https://forums.plex.tv/uploads/short-url/8h30McYzPL0ledWr5cF3sNIqT56.zip) (3.8 MB)
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### Author:  [@system](https://forums.plex.tv/u/system)
#### Post date: [May 29, 2021, 3:23am UTC](https://forums.plex.tv/t/plex-4k-hevc-transcoding-issues/694797/6 "2021-05-29T03:23:16Z")
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