High Sierra - RX Vega & Final Cut h.264 fix

Discussion in 'High Sierra Desktop Support' started by Diorama, Sep 28, 2017.

  1. Diorama

    Diorama

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    Sep 28, 2017 at 9:28 AM #1
    Diorama

    Diorama

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    Hi there,

    Last week I was as able to score and receive Sapphire RX Vega 56 on Amazon for 399 $ by following tracking stocks web site. When card arrived final version of High Sierra was not published. There were few days left....

    So i first tried with beta and everything worked well, sleep mode finally 100% perfect (even on 980ti it was not perfect) so I was really happy until I tried to export video with h.264 in FCX. I was getting error right away. I hoped that final release will fix this and after few days I was on final and I had same issue. From that moment I tried EVERYTHING but with no success. Pro res rendering was working fine, except h.264 which I use.

    Finally today after few days and 30+ reinstalls and who knows what, I even flashed RX 56 to RX 64 but nothing changed. I tried with or without WhateverGreen.kext and Lilu.kext no difference.

    Each time it would crash on the beginning. Also Chrome was crashing randomly freezing the system.

    I tried changing SMBIOS 14.2, 17.1 nothing helped....

    until I just did this

    SMB_BIOS_VERSION "IM191.88Z.0058.B00.1705091711"
    SMB_PRODUCT_NAME "iMac19,1"
    SMB_BOARD_PRODUCT "Mac-CF21D135A7D34AA6"

    and I changed product name to Imac19.1, setup board product and bios version and reboot and that was it........

    H.264 export works :)))))

    I did the test, same 4k clip (1 minute 58 seconds) with same system h.264 rendering:

    980 TI - 10 minutes 29 sec
    RX Vega 56 w 64 bios - 9 minutes 47 seconds

    I think it is still not optimized since I was getting 13 C lower CPU temp (around 61 C on i6700k with RX Vega and the card also was working almost in idle with only one led light on and the ultra quite mode with fan spinning in low comparing with 980ti where with same system and cpu temp was around 75C with full speed fan on CPU and GPU.

    Not bad for the start, but at least this is solved since i couldn't`fine anyone even speaking about this issue anywhere

    also tried Bruce test with 20 seconds vs 13 sec which I was getting with 14.2 & high sierra beta, so it looks it is slower but at least works now

    also Chrome is not freezing anymore after this at least for last 2 hours since I did it with YT on...
     
    Last edited: Sep 28, 2017
  2. unklemac

    unklemac

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    Motherboard:
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    Oct 3, 2017 at 10:29 AM #2
    unklemac

    unklemac

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    @Diorama , thanks very much!

    Does this mean we can have nearly crash free FCP X? :)
     
    Last edited: Oct 3, 2017
  3. dashingncool

    dashingncool

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    Motherboard:
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    Oct 5, 2017 at 2:56 AM #3
    dashingncool

    dashingncool

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    I am still getting crashes in different applications though chrome is working fine.
     
    rushstrike likes this.
  4. Diorama

    Diorama

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    Oct 5, 2017 at 5:58 AM #4
    Diorama

    Diorama

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    Geekbench Open CL RX Vega 56 with 64 bios
    Windows 10 - 212K
    High Sierra - around 140k to 145k
    High Sierra with lilu.kext and WhateverGreen.kext 155-160K
     
  5. Robvas

    Robvas

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    Motherboard:
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    iMac
    Oct 5, 2017 at 5:21 PM #5
    Robvas

    Robvas

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    OK,
    managed to fix it after disabling integrated graphics in BIOS. No crashing as of yet. Was crashing instantly before.
     
  6. TitteringSteve

    TitteringSteve

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    Motherboard:
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    Oct 6, 2017 at 12:17 AM #6
    TitteringSteve

    TitteringSteve

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    Good tip @Diorama. I haven't given it a go yet – my MBP TB is my video workhorse these days - but this is exactly the behaviour I'm getting with my RX Vega 56 so will probably try it soon.

    I've got iGPU disabled in the BIOS, though not sure how much that matters.
     
  7. rushstrike

    rushstrike

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    Oct 10, 2017 at 5:31 AM #7
    rushstrike

    rushstrike

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    How did you fix the chrome crashing? changing to 19,1 fixed my export but chrome and other electron based app still freezes and sometimes would just log me off.
     
  8. Diorama

    Diorama

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    Oct 10, 2017 at 5:49 AM #8
    Diorama

    Diorama

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    after 2 hours I had few crashes on chrome so I disabled hardware acceleration for now
     
    Last edited: Oct 10, 2017
  9. rushstrike

    rushstrike

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    iOS
    Oct 11, 2017 at 4:57 AM #9
    rushstrike

    rushstrike

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    MACAK and Robvas like this.
  10. Robvas

    Robvas

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    Motherboard:
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    Oct 11, 2017 at 6:31 PM #10
    Robvas

    Robvas

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    Hi there,
    can you post a snap pic of your settings. I'm not getting same results with mine.

    Thx
     

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