Rendering Hangs repeatedly when using GPU Acceleration

Hi

I am finding Premiere Pro 2021 and 2022 and Media Encoder 2021 and 2022 consistenly unreliable when rendering, and can't seem to find a fix and can't seem to diagnose the problem.

The timeline freezes when rendering ProRes in Premiere, and also Media Encoder hangs when trying to export using GPU acceleration. I was using a Vega II MPX module AND A Radeon 6800 XT in my Mac Pro,  and found the machine seems to be slightly more reliable with just the Vega MPX in there, but still it hangs loads.

If I render small parts of the timeline (less than 250 frames) it seems to be more reliable, but whenever I try to render the entire timeline it eventually seems to find a frame it hangs on, and either goes into not responding, and I have to force quit, or it crashes itself. I'll save my Crash Reports and post them here if that will help.

I'm a professional editor and worked with FCP7 then Premiere, so I'm aware of most of the fixes - have trashed prefs, cleared cache, tried resetting to defaults, different export locations, rendering with different previews, all seem to be unreliable.

CC 2021 and CC 2022 seem to do the same thing, and the only way I can usually get my exports out is either rendering the timeline in chunks in APR 422 LT then encoding this as an MP4 for upload in Media Encoder, or using Mercury Playback Engine Software Only in Premiere or Media Encoder, which takes ages, taxes my CPU, and doesn't make the most of this bloody expensive machine I have!

I'm also editing on either a LaCie 12TB RAID 5 (RW 350mbps approx) or a 4TB RAID 0 Allegro PCIe with Samsung EVO SSDs (RW 7000mbps approx) and the problem persists working on both, and if I work off my desktop.

I imagine looking at Crash Reports in detail is going to help - will post some when I have them.

Any help would be greatly appreciated - if any further information is needed please let me know

Cheers

Rob

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Here are my specs:

Hardware Overview:

  Model Name: Mac Pro

  Model Identifier: MacPro7,1

  Enclosure: Rack

  Processor Name: 16-Core Intel Xeon W

  Processor Speed: 3.2 GHz

  Number of Processors: 1

  Total Number of Cores: 16

  L2 Cache (per Core): 1 MB

  L3 Cache: 22 MB

  Hyper-Threading Technology: Enabled

  Memory: 128 GB

  System Firmware Version: 1715.81.2.0.0 (iBridge: 19.16.10744.0.0,0)

  Serial Number (system): C02GC012N5RN

  Hardware UUID: D8834343-9A19-5C38-A5EB-C109819C3276

  Provisioning UDID: D8834343-9A19-5C38-A5EB-C109819C3276

  Activation Lock Status: Enabled

AMD Radeon Pro Vega II:

  Chipset Model: AMD Radeon Pro Vega II

  Type: GPU

  Bus: PCIe

  Slot: Slot-1

  PCIe Lane Width: x16

  VRAM (Total): 32 GB

  Vendor: AMD (0x1002)

  Device ID: 0x66a3

  Revision ID: 0x0000

  ROM Revision: 113-D160BW-465

  VBIOS Version: 113-D163A1XT-047

  Option ROM Version: 113-D163A1XT-047

  EFI Driver Version: 01.01.186

  Metal Family: Supported, Metal GPUFamily macOS 2

  Displays:

LG UltraFine:

  Resolution: 5120x2880 (5K/UHD+ - Ultra High Definition Plus)

  UI Looks like: 2560 x 1440 @ 60.00Hz

  Framebuffer Depth: 30-Bit Colour (ARGB2101010)

  Display Serial Number: 008NTLE21184

  Main Display: Yes

  Mirror: Off

  Online: Yes

  Rotation: Supported

  Automatically Adjust Brightness: No

  Connection Type: Thunderbolt/DisplayPort

LG UltraFine:

  Resolution: 5120x2880 (5K/UHD+ - Ultra High Definition Plus)

  UI Looks like: 2560 x 1440 @ 60.00Hz

  Framebuffer Depth: 30-Bit Colour (ARGB2101010)

  Display Serial Number: 006NTBKDK429

  Mirror: Off

  Online: Yes

  Rotation: Supported

  Automatically Adjust Brightness: No

  Connection Type: Thunderbolt/DisplayPort

LG UltraFine:

  Resolution: 5120x2880 (5K/UHD+ - Ultra High Definition Plus)

  UI Looks like: 2560 x 1440 @ 60.00Hz

  Framebuffer Depth: 30-Bit Colour (ARGB2101010)

  Display Serial Number: 008NTXR21026

  Mirror: Off

  Online: Yes

  Rotation: Supported

  Automatically Adjust Brightness: No

  Connection Type: Thunderbolt/DisplayPort