iMac 2020, 5700XT - graphical glitch?

[CL14715]

Is anyone experiencing graphics issues so intensely that it renders their iMac unusable or is the extent of the issues more annoying in nature? Are the issues preventing you from using your iMac?

Mine are annoying but the concern is what will they eventually lead to or why is my high end machine not performing as intended?

 

[AZREOSpecialist]

Aside from that, being that all new iMac models have the T2 chip and all are powered by AMD graphics processors, why would only the 5700XT have the issue. What driver or firmware would only screw with that one and why? I have limited knowledge so I son't understand why the GPU would run any different driver wise than the 5700, which doesn't have the issue.

The 5700XT is the only one with 16 GB of RAM. The rest are 8 GB. There's that.

Is anyone experiencing graphics issues so intensely that it renders their iMac unusable or is the extent of the issues more annoying in nature? Are the issues preventing you from using your iMac?

I see fewer than five split-second white line glitches per day and I use my iMac all day (and evening) long. If you set your display to any scaling other than default the issue is resolved. No, these issues are not preventing me from using my iMac and they also are not serious, IMHO. They just shouldn't be on a computer of this "quality".

As to the corner alpha transparency issue, I don't notice it ever and couldn't care less. That issue involves fewer than 50 pixels in the upper left corner of some windows. On a retina display that's equivalent to a spec of dust. Total non-issue.

 

[wumpalumpa]

Is anyone experiencing graphics issues so intensely that it renders their iMac unusable or is the extent of the issues more annoying in nature? Are the issues preventing you from using your iMac?

you mean if the computer is burning itself or is just few glitches due chipsets being overheated and destroying themselves?

 

[AZREOSpecialist]

you mean if the computer is burning itself or is just few glitches due chipsets being overheated and destroying themselves?

Please stop insinuating this has anything to do with overheating. Glitches are occurring without any CPU or GPU load. Repeating this falsehood doesn't make it true. Your opinion (no facts) shows a clear lack of understanding of the computer's internals and technicals.

 

[iMi]

Please stop insinuating this has anything to do with overheating. Glitches are occurring without any CPU or GPU load. Repeating this falsehood doesn't make it true. Your opinion (no facts) shows a clear lack of understanding of the computer's internals and technicals.

 

[DavePorter33765]

you mean if the computer is burning itself or is just few glitches due chipsets being overheated and destroying themselves?

What I was asking was are the graphics issues bad enough that they interfere with the use of your iMac? Are the graphics defects so prominent that they obscure important graphic elements on the screen to the point were the intended use of your software is impacted? For instance, when you are surfing the web is the browser window obstructed preventing you from seeing what is on the web page? What is the extent of the diminished use of the iMac due to these graphic issues?

 

[wumpalumpa]

Please stop insinuating this has anything to do with overheating. Glitches are occurring without any CPU or GPU load. Repeating this falsehood doesn't make it true. Your opinion (no facts) shows a clear lack of understanding of the computer's internals and technicals.

clearly you are the one that knows 0 about hardware

Those chipssets doesnt need any overload, to be overheated under laptop case conditions. Those are desktop chipsets (thats the problem)

ask to any heatsink vendor (noctua, silverstone, crossair,...) about using i7 10700kf without a proper heatsink

lets see what they suggest as minimum thermal system to use those

same goes for 5700XT

open your iMac or check at iFixit, there is 1 heatsink connecting both chipsets using few heatpipes, and just 1 small fan in this heatsink. That's more than clearly not enough for a 125TDP chipset + GPU chipset

 

[ADGrant]

I certainly jinxed myself here, it’s getting catastrophic at this point. My new order arrived and was thoroughly beat by UPS in transit:

View attachment 957814

Open, re-“sealed”, wet through to interior, holes through to interior, sand and small stones throughout. But hey, it turned on.

I have also confirmed and recorded the screen tearing/white line glitch. I voted in the poll. It occurred during setup assistant. I honestly haven’t looked at the computer since but I’ll look for the corner render issue when I have the heart.

That is one of the reasons I opted not to return the iMac because of the screen glitches, no guarantee the replacement won't be worse in some way (and of course it would still have the glitches).

The other is I don't want to have to use my wife's 2014 13" MacBook Pro.

 

[Sheza]

clearly you are the one that knows 0 about hardware

Those chipssets doesnt need any overload, to be overheated under laptop case conditions. Those are desktop chipsets (thats the problem)

ask to any heatsink vendor (noctua, silverstone, crossair,...) about using i7 10700kf without a proper heatsink

lets see what they suggest as minimum thermal system to use those

same goes for 5700XT

open your iMac or check at iFixit, there is 1 heatsink connecting both chipsets using few heatpipes, and just 1 small fan in this heatsink. That's more than clearly not enough for a 125TDP chipset + GPU chipset

The GPU doesn’t get nearly as hot as the CPU, so no.

 

[wumpalumpa]

The GPU doesn’t get nearly as hot as the CPU, so no.

you haven't written to any heatsink vendor, I can tell

I guess even when heatsinks vendors tell you, they will still being "idiot, non intelligent people" as AZREOSpecialist says, because maybe they do not speak perfect english

doesn't matter if they speak 3 languages, and english is not official / not an spoken language in their countries

doesn't matter if they have degrees on Informatics AZREOSpecialist is the only one who knows here

 

[neuralengine]

What I was asking was are the graphics issues bad enough that they interfere with the use of your iMac? Are the graphics defects so prominent that they obscure important graphic elements on the screen to the point were the intended use of your software is impacted? For instance, when you are surfing the web is the browser window obstructed preventing you from seeing what is on the web page? What is the extent of the diminished use of the iMac due to these graphic issues?

With respect, even if the answer to all of these questions is “no,” it’s still hard to square with a) Apple’s reputation and b) Apple’s pricing. This mismatch creates a valid, in my opinion, concern about the longevity of the computer if these glitches develop into a greater problem down the line. Yes, AppleCare might cover it but even if it does, the downtime – especially during a pandemic – would be tremendously harmful.

 

[AZREOSpecialist]

With respect, even if the answer to all of these questions is “no,” it’s still hard to square with a) Apple’s reputation and b) Apple’s pricing. This mismatch creates a valid, in my opinion, concern about the longevity of the computer if these glitches develop into a greater problem down the line. Yes, AppleCare might cover it but even if it does, the downtime – especially during a pandemic – would be tremendously harmful.

Apple should give customers free AppleCare for this product. Consumers should not have to pay hundreds of dollars for an extended warranty to cover a defect that is visible on day one.

 

[AZREOSpecialist]

DAY 50 WITH NO FIXES
[automerge]1600863985[/automerge]
All the ‘no’ 5700 XT votes are making me giggle.

Pretty obvious Apple intends to do nothing wrt this issue. Not even the latest beta builds of Big Sur, which just added 2020 iMac support, do not contain a fix. Unless Apple gets a big, black eye on this like they did with Antenna-gate, they won't do anything.

 

[CL14715]

Pretty obvious Apple intends to do nothing wrt this issue. Not even the latest beta builds of Big Sur, which just added 2020 iMac support, do not contain a fix. Unless Apple gets a big, black eye on this like they did with Antenna-gate, they won't do anything.

So it’s confirmed that the resolution scaling to any other than default stops the flicker? If so that makes me feel a little better.

 

[DavePorter33765]

With respect, even if the answer to all of these questions is “no,” it’s still hard to square with a) Apple’s reputation and b) Apple’s pricing. This mismatch creates a valid, in my opinion, concern about the longevity of the computer if these glitches develop into a greater problem down the line. Yes, AppleCare might cover it but even if it does, the downtime – especially during a pandemic – would be tremendously harmful.

I believe you misunderstood why I asked the questions posed. I was not inferring that the concerns that people are reporting should be ignored, in reality, I truly want to understand the real impacts that these graphic issues are causing. I am not experiencing any issues myself, however, others have stated that they only stared having problems some time after their began using their new iMac. I am trying to assess the potential problems that I could experience eventually. None of the posts I have read in this thread stated how the use of their iMac is being impacted due to these graphic issues.

 

[neuralengine]

I believe you misunderstood why I asked the questions posed. I was not inferring that the concerns that people are reporting should be ignored, in reality, I truly want to understand the real impacts that these graphic issues are causing. I am not experiencing any issues myself, however, others have stated that they only stared having problems some time after their began using their new iMac. I am trying to assess the potential problems that I could experience eventually. None of the posts I have read in this thread stated how the use of their iMac is being impacted due to these graphic issues.

My bad, sorry!

 

[PBG4 Dude]

I believe you misunderstood why I asked the questions posed. I was not inferring that the concerns that people are reporting should be ignored, in reality, I truly want to understand the real impacts that these graphic issues are causing. I am not experiencing any issues myself, however, others have stated that they only stared having problems some time after their began using their new iMac. I am trying to assess the potential problems that I could experience eventually. None of the posts I have read in this thread stated how the use of their iMac is being impacted due to these graphic issues.

So far it’s only a nuisance, just affirmation there’s an issue with my new computer, but so far it has not affected operation at all.

 

[GeorgeMcFly]

I just got aware of this thread today, and guess what I saw immediately? The white line flicker and the blinking edges on mail while mooving the window.
i7 and 5700XT. Just voted.

But: has anybody noticed any issues running Windows? I use Parallels and a bootcamp partition also.
Running Windows10 via bootcamp and running Doom Eternal I found absolutly no issues at all.
Using Windows and MS Office the Mac just runs fine (there have been two ATI driver updates also within the last three weeks).

So this and that the edges can only be seen in mail makes me pretty sure that it is a driver issue only. There‘s something wrong with gpu memory allocation under certain circumstances.

2020 iMac, i7, 5700XT, 128GB, 2TB

btw: I just upgraded from a late 2009 27ˋ iMac, hell of a machine.

cheers
Jörg

 

[nkurtar]

I just got aware of this thread today, and guess what I saw immediately? The white line flicker and the blinking edges on mail while mooving the window.
i7 and 5700XT. Just voted.

But: has anybody noticed any issues running Windows? I use Parallels and a bootcamp partition also.
Running Windows10 via bootcamp and running Doom Eternal I found absolutly no issues at all.
Using Windows and MS Office the Mac just runs fine (there have been two ATI driver updates also within the last three weeks).

So this and that the edges can only be seen in mail makes me pretty sure that it is a driver issue only. There‘s something wrong with gpu memory allocation under certain circumstances.

2020 iMac, i7, 5700XT, 128GB, 2TB

btw: I just upgraded from a late 2009 27ˋ iMac, hell of a machine.

cheers
Jörg

Welcome to the people of white lines club. Nobody to date has experienced glitches running Windows. Also Resolution select other than default seems glitch free. I just did a quick update.

 

[sean+mac]

Redacted. TL;DR I was commenting that people should be reporting this more to Apple, but it turns out I had a day old cached copy open I was responding to. My comment was basically beating a dead horse once I saw the updated conversation.

Will retain the comment I am waiting for this issue to be resolved before ordering an 5700XT model, which is why I follow the thread. Starting to think a 2019 on sale isn't the worst idea...

 

[lolmiketaylor]

I think no one have talked about the glitch using SIDECAR with iPad Pro gen 8 so here the result with it...

I've been using during the whole morning, around 4 hours of use.
No white line glitch in any of the screens.

I don´t have the default resolution on the iMac, but when you are using Sidecar it turns to default. Still no white line glitch.

But as you can see in the image attached, the corner has its owns black corners when on iPad screen.

And the split screen thing just appeared now using Sidecar only on the iMac screen. OFC it doesn't show on screen caps.

Turned off Sidecar and slip screen still going on even on not default resolution. (I don't have True Tone activated nor night shift)

I decided to restart the iMac and the half screen thingy when away at the same time I clicked on restart and all the icons and menus goes away while the desktop image still is in there. Restarted and all seems fine now.

 

[wumpalumpa]

Welcome to the people of white lines club. Nobody to date has experienced glitches running Windows. Also Resolution select other than default seems glitch free. I just did a quick update.

Only black screens and reboots on bootcamp Windows 10.
MacOS should shutdown also, as secure approach, instead of letting the chipset burn.

Actually both systems (MacOS, Win10) should shutdown and show a thermal error message when booting up after a thermal problem. Telling users, system will take at least 10 minutes before booting again, with a countdown and auto shutdown after this message.

iPhone does something like that if you place it on the sun for long time, right?

only solution would be massive replace iMacs 2020 with different hardware (I think is 5700XT the one is causing the overheat, although i7 10700kf also produce a lot of heat) or maybe software patch underclocking the chipsets


Apple really ******* this iMac generation
Why apple placed those desktop chipsets inside an iMac instead of using laptop chipsets?

same. Apple ******* Mac Pro this generation
Why they haven't released 2 Mac Pro versions?

Mac Pro > Keeping last small form factor but in a better looking case (trash can style was criticized)

Mac Pro XL > For those in need of monster GPU Power. Nowadays the only reason of Mac Pro being that big is to fit a 2nd graphic card

Choose your Mac Pro and your Display (combo price), option for 2 displays instead of one

offering succulent discounts buying a Display attached to a registered Mac (in case you want to buy a second display later)

This should be the offer

How is that? Apple cannot do without Steve Jobs? is there any secret plot among ex-employees and employees against "The New Apple"? What is happening Apple?

Sure ARM chipsets will not heat that much (rarely would be as powerful as i7 10700kf, and/or future Rocket Lake. Tiger Lake are already here, are just amazing)

I really want to see what they offer as next Professional line

 

[LGR]

I completed a 4 hour recording, mixing and mastering session last evening utilizing my new iMac. This session was a rather complicated one with live instrument and vocal recording as well as numerous virtual orchestral instrument tracks. There were also numerous virtual effects utilized. My Mac was pushed very hard over an extended period. It performed flawlessly in every way. Even with the heavy load it was experiencing, the fan noise was mostly low to moderate. No hick-ups were experienced under conditions that would have been too much for my previous iMac. The most important thing is that I still didn’t experience any crashes or video issues of any kind.

I have similarly tested my 2020 fully loaded imac with ps, bridge, lr, nimbers, pages, etc. running without problems of any kind.

 

[haddy]

Apple should give customers free AppleCare for this product. Consumers should not have to pay hundreds of dollars for an extended warranty to cover a defect that is visible on day one.

In NZ under our "Consumers Guarantee Act" Apple has to repair/replace any defect for two years from purchase. So no need for AppleCare. This happened to me: my internal SSD stopped working after one year (replaced at no charge to me) then one year later the replaced SSD failed. So I am on my third 1TB internal SSD all at no cost to me. And the two years starts from the date of replacement/repair as well!!

 

[LGR]

Btw. Why did ZERO of the tech review youtube channels have these problems?

I am certain a few had the same maxed out video card.

Strange?

Simply because that isnt the case. One of them sent me here. And they are mentioned in prior pages of this topic.