I’m not doubting there’s a crash. I just don’t think you can necessarily lay it at the feet of the 2020 iMac.
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iMac 2020, 5700XT - graphical glitch?
- Thread starter torifile
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I found some other guys who have similar problems with bands and crashes of this program - all GPUs of the 5xxx series
Now you’re just being obstinate. The software crashes on an entire class of GPU. That seems to be a problem with said software. Regardless, it’s outside of the scope of the glitch that initiated this 500 post thread.
Well except that the cause of the glitches mentioned in this thread are probably the video driver software which some believe affects this entire class of GPU and the only other Macs with this type of GPU are the 16" MacBook Pro and some Mac Pros with the W5700XT card. I wonder what problems they are having.
I'm now also in contact / direct exchange with Apple Germany regarding this issue and should provide screenshots, screen recordings and so one to document the issue. Guess what for the entire session today the glitch didn't show up! Bet once I restart and do not capture the screen the flickering appears within seconds 
Do anyone of you have a screen recording where it does show up or does it only show up when you record the screen with another camera? I'm also curious how to provoke the iMac to display the glitch as it's near to impossible for me to time or reproduce this issue!
Thankful for any screenshots and videos I can forward to the support team!
Do anyone of you have a screen recording where it does show up or does it only show up when you record the screen with another camera? I'm also curious how to provoke the iMac to display the glitch as it's near to impossible for me to time or reproduce this issue! Thankful for any screenshots and videos I can forward to the support team!
Has anyone installed the Big Sur public beta to see if this issue exists in Big Sur? Perhaps Big sur has newer drivers?
It happens randomly. Can't provoke.I'm now also in contact / direct exchange with Apple Germany regarding this issue and should provide screenshots, screen recordings and so one to document the issue. Guess what for the entire session today the glitch didn't show up! Bet once I restart and do not capture the screen the flickering appears within seconds
Thankful for any screenshots and videos I can forward to the support team!
I don't understand why Apple needs us to provide screen recordings and logs, etc.
All they have to do is turn on an iMac with the 5700XT!
I'm convinced it's happening on every machine with the 5700XT. So many people said it wasn't happening on theirs, but then realized it was. It's a fast glitch that happens infrequently.
You probably missed the glitch because you were focused on dunking an Oreo cookie into milk, and weren't looking at the screen (in that brief moment).
All they have to do is turn on an iMac with the 5700XT!
I'm convinced it's happening on every machine with the 5700XT. So many people said it wasn't happening on theirs, but then realized it was. It's a fast glitch that happens infrequently.
You probably missed the glitch because you were focused on dunking an Oreo cookie into milk, and weren't looking at the screen (in that brief moment).
I have just seen the glitch on my iMac for the first time since initial setup 5 days ago.
Wow really!?! Didn't realize that ... they better hurry up with that since it will be out in a couple months.
No one has reported in the poll having a problem with white lines. At least one person has reported the corner issue in this thread though.
I'm into my third day of dropping the resolution down to 2048 per suggestion by @shywizard and have not seen the flashing white line. Two nights of darkened wallpaper and normal usage and nothing, despite seeing the glitch in similar conditions when at the default resolution. Going to change my wallpaper to something permanently darker vs dynamic to see if it could still be happening during the day but just haven't been seeing it.
Well, I need a computer soon, so I am leaning towards the regular 5700.
Might I regret it later not upgrading to the XT for a mere $200 if/when this gets fixed? Perhaps.
Though it is unclear whether this is software or hardware.
Then there is the question of who is responsible for the remedy, Apple or AMD?
Also, there have been more tests and reviews for the 5500 and 5700XT than the 5700.
Anyone have any advice for me about the regular 5700?
I am working in FCP and with 4K. No 6K or 8K on the horizon.
Thanks.
Might I regret it later not upgrading to the XT for a mere $200 if/when this gets fixed? Perhaps.
Though it is unclear whether this is software or hardware.
Then there is the question of who is responsible for the remedy, Apple or AMD?
Also, there have been more tests and reviews for the 5500 and 5700XT than the 5700.
Anyone have any advice for me about the regular 5700?
I am working in FCP and with 4K. No 6K or 8K on the horizon.
Thanks.
Thank you PieTunes for testing out this display resolution theory. I don't believe you will see the glitch, which is good because if it only happens on the Default Resolution -- it means this is more likely a software glitch and not a hardware glitch.
The more and more we all seem to be dealing with this and trying different things, the more it does lean towards being software related. Just hope it's something that can be resolved by Apple themselves, or Apple in conjunction with AMD, if that's the case, assuming the latter doesn't sit on their hands for awhile.
I'm really curious to see if a beta of Big Sur fixes this when a compatible version is released for the 2020 iMac. Maybe some kind benevolent souls out there would be willing to install it and let us know!
I’ll be testing BS On my iMac from an external SSD once the next beta releases, unless the release notes say it still isn’t compatible.
Nope and I’m on zoom for literally hours/day. I do have a secondary display connected but I am using and looking at zoom on the main display.
I thought it's been confirmed that the white line glitch is not exhibiting itself at all when a second display is connected? Are you saying:
A) you can still see the white line glitch occasionally with second screen attached (but not necessarily while using Zoom)
or
B) you can't see the white line glitch at all with second screen attached (therefore nor while using Zoom)?
I'm the one who's confirmed it. I haven't seen it since connecting my external display.