Yesterday at work on a MacPro mid 2010 upgraded to 12core 3.33GHz, 24 GBRam, OS 10.12.6 MC 2018.12.1 and a newly installed used GTX-680 from another work computer swapping out a Radeon 5770 I had video hits/glitches created in renders to ProResHQ. Video is clean but after rendering a safe color limit there would be redish and whiteish and bluish splashes of macro blocks in the render. Deleting the render and new glitches in different spots. Some of the video had a nested sapphire beauty effect inside a sapphire vingette on V2 over the clip and some was just straight DNX-175X transcodes from UHD Sony Slog 3 cine media.
Below the render everything is clean. The fact that it was random and not always in the same spot makes me think perhaps the newly installed GTX-680 might be the culprit. I had been rendering all day without seeing this issue. It was just when I went back to change a section that it cropped up.
I had found the system would vaporize when I was working in Sapphire builder or the preset window randomly and I then switched from the nvidia webdriver to the OS internal GPU drivere. That seemed to stop sapphire from vaporizing the system at least in the limited time I tested it.
By vaporized I mean no beachball just poof a black screen and the computer reboots with an error message. I've seen this behavior on my home system with similar specs only a mid 2012 mac pro which also has a GTX-680. I saw the vaporizing at home when trying to do 4K in Resolve before I had my expansion chassis and the correct web driver to recognize multiple GPUs. At the time I thought it had to do with lack of Vram on the GTX-680 as Resolve would send up error messages sometimes to that effect.
At work when I started to see the render glitches I switched back to the web driver just to see if that made a difference but it didn't. I was able to rerender a section of just glitched area and it went a way. I was rendering about a minute worth of video and it would randomly place glitches so my final fix was to render the minute then unrender just the section within the minute that had glitches and the second time it was clean.
I didn't think Avid used GPUs for render but that might be an oversimplification as I've been told the ACPL architecture uses the GPU for some real time effects performance. Now I'm wondering if the GPU does have some involvement in rendering effects. I have never seen this kind of render glitch on this system prior to installing the GTX-680 which I mentioned is used from another computer. Perhaps this GTX-680 has issues?
Anybody seen this behavior?
---In Avid-L2@yahoogroups.com, <bigfish@...> wrote :
---In Avid-L2@yahoogroups.com, <bigfish@...> wrote :
Just saw this pop up. I am still on Mac OS 10.12.5 on my home system that has a GTX-680 but looks like I will need to deal with this when I head to the land of High Sierra.
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John Moore Barking Trout Productions Studio City, CA bigfish@...
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Posted by: bigfish@pacbell.net
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