Disconnect the camera/BT cable (check the known issues with NVIDIA cards on the first post and follow the links) and retry.
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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What I did first was removing the card completely and then indeed, the boot issue disappeared, now I have 2 leds...
Sorry, I was not aware of this possible issue with the Quadro K2000M.
I had tried before with an a GTX 765 on an unmodded heatsink, this works but with after a while, it fails (because of the unmodded heatsink I guess).
So my question is now: having these 2 cards, which one would you advice to continue with, the Quadro K2000M or the GTX 765? Thanks for your advice and patience.
For now I decided to re-try with the GTX765 since this gives me no hardware issues at boot-time. Also noticed that the ROM got updated of this card since I flashed this one, will update it. I also will do the heatsink-mod (3-pipe) which seems obligatory for this card. Let you know how it goes...
I did the mod for the 3-pipe heatsink, installed the GTX765 and flashed it with the lateste ROM found on the first POST for this card.
For now it runs ok...
Happy with the result so far!
Tried to do benchmarking with Unique Valley but this showed me only a fix temp of 129C. Have no experience with benchmarking and do not know how to interprete this.
Will test it for some days and then try to install Monterey...
Good to hear your card is working fine. The temperature problem has been described - you guess right - on the first post, too. You may consider replacing the ODD sensor onto the heat sink to get another fan / heat curve. Otherwise you will have to rely on Macs Fan Control entirely.
Nice, but keep in mind both cards crash on wake and both cards need a PRAM reset on boot in your iMac12,2.
I really appreciate your courage, meanwhile I moved the cards to other iMac11,x systems.
Still not clue how to correct this bug.
Well, when the main card is 7100 - mostly, I does not have to reset pram while first boot, also - mostly, no pram reset required while I’m using w6170 via adapters, I still have no idea, why I have fully working Bluetooth if the adapter is not connected to the motherboard just antennas connected to it
By the way as I understand, maybe I am wrong, but, the guy who sells those cards said that he has two types of them - one is with a lot of stickers and the second one is with few stickers, my system starts only when he sent me another card with a small amount of stickers
You have OCLP installed, which is why the mouse works. My mouse works in Monterey too.
One more thing, while trying to boot with dual cards - Monterey crashes and reboots, Catalina won’t crash and no rebooting, Catalina boots with dual cards only in one case - system reports that card installed is and Radeon hd 9xxx, if there is a full specs like r9 285 8gb - system won’t boot
Hi, yesterday I changed the graphics card of my iMac 21 2011 from a 6750M to a WX 4150 found in an old Dell Inspiron PC, I think I installed it correctly.
However, since I'm stupid I didn't prepare anything before 🫠 So my macOS High Sierra boots without backlight, whether I do PRAM resets (where the chimes are abnormally long) or try to blind boot on a linux key, does not work.
I installed OpenCore but I don't think I can boot from it, since there is no boot picker.
So my question is: How to boot on OpenCore and how to flash the bios when you don't have access to the boot picker?
Thank you in advance for your answers !
However, since I'm stupid I didn't prepare anything before 🫠 So my macOS High Sierra boots without backlight, whether I do PRAM resets (where the chimes are abnormally long) or try to blind boot on a linux key, does not work.
I installed OpenCore but I don't think I can boot from it, since there is no boot picker.
So my question is: How to boot on OpenCore and how to flash the bios when you don't have access to the boot picker?
Thank you in advance for your answers !
Yes, yes: Reading the docs and preparation is everthing….
You hit the High Sierra bug of the AMD cards. You can switch the internal LCD on by connecting an (additional) external display or just a display emulator stick to the working miniDP port. There a single software solution with OCLP described within the docs.
To boot into the Linux USB key you need to disconnect the internal HDD/SSD.
And I am pretty sure you do not boot OpenCore since it should enable the backlight on power/OpenCore boot while macOS High Sierra switches it off on macOS boot (this is the High Sierra bug of the AMD vBIOS).
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To be correct: It's not the bug, it's a feature.
That's the feature for Target Display Mode in High Sierra, which haven't been hacked by our experts, yet.
Thanks a lot for your message!
Thanks to you, I managed to advance a little further: By disconnecting the hard disk, I managed to have access to OpenCore (without backlight) after reflection, research and all that… I agreed that it was better to use Windows and flash GPU rom on it.
So I use an external hard drive (which has already been used with the broken computer which had the graphics card so it worked directly) I tried to install the custom ROM (still without backlight or external screen) and that didn't want to install because SSID mismatch... so I searched in the thread a bit and someone shared a ROM of RX 560.
I tried and it worked straight away. I restart and OpenCore works with backlight.
I plug the hard drive back in and try to boot into MacOS… black screen. I haven't looked further for now
so I went back to Windows and I try the performance/temperature on Windows first, I will send a message when I have more advanced.
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You can force flashing a new vBIOS with the
-f flag, i.e. ./amdvbflash -f -p 0 new.rom. Using the iMac vBIOS might break Windows acceleration (Error 43), check the post I made about a potential fix some pages before …
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Today I installed Monterey on this machine, everything works like a charm (wifi, BT) AND got Brightness Controll back!
What should I do with my Quadro K2000M? Could this card give an equally good result with an Imac 2011 as the GFX765?
Thanks and regards,
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this is what happens when i try to start macos :
I managed to change the bios on linux, so it is that of the modified WX 4150.
On Windows I encountered a BOSD, but once I was on Ubuntu I realized that the iMac had installed the drivers for the Intel card, and this error came from there. Once in safe mode I disabled it, then restarted the computer, Windows was working.
I tried the Stray game that was on it, however the computer suddenly shut down. Possibly a power or cooling problem? The iMac is normally warm, not hotter than before. And the fans are pretty quiet.
So my question now is: how to make macOS work? And why did it crash you think?
Please verify the type of the VRAM chips which are installed on your card.
It's also very important to pay attention to any hints given on the first post (or the posts linked there) regarding the "correct" installation of the card.
This does not always happens, right? Is it vBios-specific or model-specific? Using Internetzel's vBios for a WX4150 has never given me any issues on my 12,1 iMac on Windows. I used the AMD Radeon Pro drivers for Dell located in their page. Installed them right away and have full acceleration. The iMac is used more than 60% of the time for gaming, things like Genshin, FFVII, Ys, etc.
Can you give more detail on the drivers you used? From the dell website or AMD? maybe a screenshot of device manager or something.
I have a 12,1 with a WX4150 and I can't get any drivers working. I've tried Pro, and Adrenaline and for Dell and for HP. Even the the driver Windows tries to automatically install (amd wx pro) causes a crash.
Then I have to go into safe mode and delete the driver.
Thanks.
For my part i only used the bios from the first post and it’s working on Windows.
However, i’m unable to get into MacOS. What’s your bios are you using ? it’s working with MacOS High Sierra ?
Also you need to remove the Intel’s driver, they cause me a BSOD