Poor performance on 10 core iMac Pro with Vega 64X

Duradrum

macrumors newbie
Original poster
Dec 14, 2017
12
7
Hi,

Have recently purchased a 10 Core iMac Pro from Apple direct. Went 2TB, 64GB Ram and Vega 64X.

Having real slow speeds exporting. A 10 min H.265 video edit from FCPX is taking over an hour. Tried the usual trashing prefs, new user account etc to no avail.

Anyone else experience poor performance. FCPX is slow and laggy.

Even on export its barely using any of the available power:

Screenshot 2019-09-18 at 15.26.14.png
 

priitv8

macrumors 68040
Jan 13, 2011
3,568
452
Estonia
If you are exporting a 10-bit HEVC, then there is no hardware support on any of current Macs and export uses main CPU only.
On the other hand, on iMP the T1 chip should accelerate 8-bit HEVC encode and it should not take one hour.
 

PBMB

macrumors regular
Mar 19, 2015
225
38
Have recently purchased a 10 Core iMac Pro from Apple direct. Went 2TB, 64GB Ram and Vega 64X.

Having real slow speeds exporting. A 10 min H.265 video edit from FCPX is taking over an hour. Tried the usual trashing prefs, new user account etc to no avail.
Have you tried VideoProc to see if it makes a difference with respect to FCPX? Obviously I assume here that the long time is due to the encoding/exporting process.
 

nihil0

macrumors 6502
May 19, 2016
287
180
From other user in other topic:

Currently in FCPX, 10-bit HEVC is very slow on both 2017 iMac Pro and my 2017 i7 iMac. 8-bit HEVC is a lot faster. I'd estimate rendering to 10-bit HEVC in Premiere is about 6x faster than FCPX right now. Likewise DaVinci Resolve 16 on the iMP is fast on rendering 8-bit HEVC but super-slow on 10-bit HEVC. Maybe the next versions of FCPX and Resolve might fix that.
 
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