Latest post Mon, Sep 16 2019 2:50 AM by jef. 1 replies.
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  • Wed, Sep 11 2019 12:17 PM

    • MylesOSS
    • Not Ranked
    • Joined on Fri, Jul 13 2018
    • Posts 13
    • Points 165

    Slow Rendering Sapphire Effects

    We're experiencing poor CPU utilisation when rendering a timeline in Avid. We're using a 10gbps connection to our Avid Nexis storage system and only achieving write speeds of around 200mbps. We would expect higher write speeds with more CPU utilisation but for some reason it only stays at around 13% on all cores for the entire render process. Editors are left waiting a long time for the render to complete (sometimes with clients in the room) so we're keen to know what could help speed it up. The machines are newly purchased HP Z8G4's (see computer spec below).

    It's taken roughly 1.5 hours to render an estimated 25 minutes worth of sapphire field merge effects to DNx185 X resolution MXF files. Video mixdowns however send the CPU usage to max and we achieve the high write speeds we expect so is it something not set correct with Sapphire / Avid?

    Is there a recommended setting with sapphire / avid to increase the amount of CPU usage when rendering? We see maximum CPU usage during video mixdowns but not with the rendering of sapphire effects. Attached screenshot shows what we're getting out of the CPU's when rendering here.


    Fully Licensed:

    GenArts Sapphire Plug-ins 9.03 for Avid AVX Products

    Media Composer Symphony 2018.12.6




    System Specs - Quick Overview

    Operating System: Windows 10 Pro for Workstations 64-bit (10.0, Build 17763) (17763.rs5_release.180914-1434)
    Language: English (Regional Setting: English)
    System Manufacturer: HP
    System Model: HP Z8 G4 Workstation
    BIOS: Default System BIOS (type: BIOS)
    Processor: Intel(R) Xeon(R) Gold 6134 CPU @ 3.20GHz (32 CPUs), ~3.2GHz
    Memory: 98304MB RAM
    Available OS Memory: 97742MB RAM
    Page File: 25371MB used, 170675MB available
    Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 12
    DX Setup Parameters: Not found
    User DPI Setting: 120 DPI (125 percent)
    System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
    Miracast: Available, with HDCP
    Microsoft Graphics Hybrid: Not Supported
    DxDiag Version: 10.00.17763.0001 64bit Unicode
    Card name: NVIDIA Quadro RTX 4000
    Chip type: Quadro RTX 4000


  • Mon, Sep 16 2019 2:50 AM In reply to

    • jef
    • Top 25 Contributor
    • Joined on Sun, Feb 26 2006
    • Maryland
    • Posts 3,789
    • Points 45,365

    Re: Slow Rendering Sapphire Effects

    Is GPU acceleration an option with this effect?  It should help.


    Avid DS 11.0.2 R.I.P | MC "Well, it depends ..." mostly 8.12.9|OS 10.14.x - iMac Pro 2019 - home system MacPro Dual 2.8 8core GTX680 "Harpertown"... [view my complete system specs]


    Jef Huey

    Senior Editor

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