I don't think so, given that RAM operates at ~1.5V, but I'm not going to lick my finger and stick it in there to test it.
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
2020 iMac Constant Kernel Panic Crashes whenever using 2nd Monitor
- Thread starter oncilla
- Start date
- Sort by reaction score
I do not have any iMac nor the 2020 Modell but from what i have read and maybe i have missed something nobody was using a direct Thunderbolt 3 Connection aka USB C.
If i have read the specs correct there is no HDMI/DP/TB2 Port @ the iMac 2020 but you have to use an Adapter.
If this is correct then why has nobody talked about ?
First: HDMI with an Adapter at any Mac these days is not a good idea.
Second: there are TB/USB-C to DP Cables available that are working very good.
Third: if you have tried the difference from HDMI to DP on a Mac with the same Monitor you can see there is no Variable Refresh Rate or HDR Option available with the same Grafics (PowerMac7,1 RX6600) or MBA M2 and the same Monitor on both Mac´s when using HDMI but with DP or TB3/4 to DP cable.
If i have read the specs correct there is no HDMI/DP/TB2 Port @ the iMac 2020 but you have to use an Adapter.
If this is correct then why has nobody talked about ?
First: HDMI with an Adapter at any Mac these days is not a good idea.
Second: there are TB/USB-C to DP Cables available that are working very good.
Third: if you have tried the difference from HDMI to DP on a Mac with the same Monitor you can see there is no Variable Refresh Rate or HDR Option available with the same Grafics (PowerMac7,1 RX6600) or MBA M2 and the same Monitor on both Mac´s when using HDMI but with DP or TB3/4 to DP cable.
UGREEN USB C to DisplayPort 1.4 Cable Bidirektional 8K@60Hz 4K@240Hz DisplayPort to USB C Thunderbolt 4 （2M）
Last edited:
ok I have a iMac 27" 2020 mac, 3.8 Ghz 8 -core intel core, AMD Radeon Pro 5500 XT 8 GB, 128 GB 2667 MHz DDR4, now running MacOS 15.3.2
I have had big problems crashing after upgrading from the original OS which was Catalina. When I first got the machine I upgrade the OS and it was a nightmare. After a month apple finally was able to get me back to the beginning with Catalina. Everything went back to normally and I worked with the machine professionally with 128 gb of ram. I finally upgraded the OS in 2024 when I was done with all my projects. It was a disaster. I have nothing but kernal panics even when the machine is at rest. Never seen any thing or heard anything like it. I have gone through all that everyone has spoken of hear. I only need this machine for a few more years. If I can not get this issue solved I will never buy a mac. To get a ram set up in unified memory it would cost me three times more than I payed. No iMac with 27" monitor and I dont trust the new studio mac. No thanks. I'm guessing the only hope I see is the D6000. Currently my second monitor is an ASUS PA278CV. Connection type Thunderbolt/Displayport. I worked in the movie industry for 30 plus years. I have seen it all. This machine is shamefull. Or I should say apple is. It worked fine with the original and a second moitor for years until the the OS was updated. But I knew that would be the end. The studios I worked in never wanted us the update our OS. Obviously.
I have had big problems crashing after upgrading from the original OS which was Catalina. When I first got the machine I upgrade the OS and it was a nightmare. After a month apple finally was able to get me back to the beginning with Catalina. Everything went back to normally and I worked with the machine professionally with 128 gb of ram. I finally upgraded the OS in 2024 when I was done with all my projects. It was a disaster. I have nothing but kernal panics even when the machine is at rest. Never seen any thing or heard anything like it. I have gone through all that everyone has spoken of hear. I only need this machine for a few more years. If I can not get this issue solved I will never buy a mac. To get a ram set up in unified memory it would cost me three times more than I payed. No iMac with 27" monitor and I dont trust the new studio mac. No thanks. I'm guessing the only hope I see is the D6000. Currently my second monitor is an ASUS PA278CV. Connection type Thunderbolt/Displayport. I worked in the movie industry for 30 plus years. I have seen it all. This machine is shamefull. Or I should say apple is. It worked fine with the original and a second moitor for years until the the OS was updated. But I knew that would be the end. The studios I worked in never wanted us the update our OS. Obviously.
Last edited:
Anyone having issues with this iMAC and using Aftermarket RAM, TEST IT - https://www.kelleycomputing.net/rember/
I'm on my second 2020 iMac, no issues using second display.
I'm on my second 2020 iMac, no issues using second display.
This is true. I followed this thread for months trying to fix my iMac issues. All the dual monitor info I followed ended up being a waste of time. I thought my memory was fine because I only tested it under the iMacs tools. My memory was actually not ok. I had a 128 gb of ram and I sent it back to the company I bought it from. I got new ram and all my kernal crashing came to an end. Test your ram through the mac tools does not do the job. I wish I would have done it right from the beginning. It would have saved me a half year of headaches. All the dual monitor theories I followed were a dead end.