GPUIntelPlex

Intel Arc A380

A Plex stress-test post reports 24 simultaneous transcodes of 4K HDR at 35 Mbps down to 1080p at 10 Mbps on an Arc A380, with no hitching or buffering. The title does not say whether tone mapping was enabled. 2 other reports on this page.

Low-power Arc card people drop into a Plex or Jellyfin box for Quick Sync. Counts below are separate user reports, not one lab running every test.

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Reported results

A dash means the source did not count that kind of stream. Single-stream speeds are fps for one file, not a guess at how many clients fit.

PlexQuick SyncAnecdote

On an older Xeon E5-1660 v3 system with no resizable BAR, one owner tested Plex to six simultaneous 4K HEVC transcodes using their highest-bitrate movie. They also run Jellyfin on the same Arc A380 and say AV1 encoding works.

1080p: —
4K: 6
4K HDR tone map: —
Power: —
Price paid: —

Not stated (X99 desktop, Xeon E5-1660 v3, no resizable BAR)

r/PleX — Intel Arc users (GotNoRice on the A380)

Notes from the source

Comment by GotNoRice on r/PleX, 30 Sep 2026, in a thread about Arc cards. No screenshot is quoted in the comment. They say they have not seen the missing resizable BAR hold the card back for this workload.

PlexQuick SyncAnecdote

On TrueNAS 24.10, an Arc A380 was pushed to ten Plex streams of 4K HEVC down to 1080p HEVC. The last two buffered. The commenter thought Plex had run out of RAM at a 24 GB app limit, and that 32 GB might have held all ten.

1080p: —
4K: 8–10
4K HDR tone map: —
Power: —
Price paid: —

TrueNAS 24.10

r/PleX — A310 thread, A380 comment by Joloxx_9

Notes from the source

Comment by Joloxx_9 on the Sparkle A310 thread, 12 Mar 2025. They say they do not expect more than six or seven real transcodes at once, so the ten-stream run was a stress test. Tone mapping is not mentioned.

PlexQuick SyncStream count

1080p: —
4K: 24
4K HDR tone map: —
Power: —
Price paid: —

OS not stated

r/PleX — Arc A380 stress test, 24 streams

Notes from the source

Reddit r/PleX post title: "Arc A380 stress testing (4K HDR 35Mbps > 1080p 10Mbps) transcode - 24 streams with no hitching/buffering." A later comment on r/unRAID points at this thread as the A380 doing 24 of those transcodes. Host, OS, and Plex version are not in the title.

Server	Accel	OS	1080p	4K	4K HDR tone map	Power	Price	Kind	Source
Plex	Quick Sync	Not stated (X99 desktop, Xeon E5-1660 v3, no resizable BAR)	—	6	—	—	—	Anecdote	r/PleX — Intel Arc users (GotNoRice on the A380) Notes Comment by GotNoRice on r/PleX, 30 Sep 2026, in a thread about Arc cards. No screenshot is quoted in the comment. They say they have not seen the missing resizable BAR hold the card back for this workload.
Plex	Quick Sync	TrueNAS 24.10	—	8–10	—	—	—	Anecdote	r/PleX — A310 thread, A380 comment by Joloxx_9 Notes Comment by Joloxx_9 on the Sparkle A310 thread, 12 Mar 2025. They say they do not expect more than six or seven real transcodes at once, so the ten-stream run was a stress test. Tone mapping is not mentioned.
Plex	Quick Sync	—	—	24	—	—	—	Stream count	r/PleX — Arc A380 stress test, 24 streams Notes Reddit r/PleX post title: "Arc A380 stress testing (4K HDR 35Mbps > 1080p 10Mbps) transcode - 24 streams with no hitching/buffering." A later comment on r/unRAID points at this thread as the A380 doing 24 of those transcodes. Host, OS, and Plex version are not in the title.