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Info to upgrade a graphic card

M

M@Costa

macrumors newbie
Original poster
Sep 2, 2021
8
0
HI, I am new in this forum.
I know here there is a guide to upgrade the GPU for an iMac mid2011 21.5'. May I know the best solution and the best way to find and buy a graphic card to work with Gopro files? Thanks In advance.
 
M@Costa said:
HI, I am new in this forum.
I know here there is a guide to upgrade the GPU for an iMac mid2011 21.5'. May I know the best solution and the best way to find and buy a graphic card to work with Gopro files? Thanks In advance.
Click to expand...

Buy a second hand iMac 21.5" 2017. It would be less troubles than upgrading your current iMac.
If you still want to go the protagonist way, check the below thread. Need to read post #1 until you fully understand it.

forums.macrumors.com

2011 iMac Graphics Card Upgrade

iMac 2009 to 2011 MXM3 graphics card upgrade (Lastest update 10/13/2023 - this is the official documentation page - you found it finally!) This is the single and only documentation post. During the last years we constantly updated this post to reflect the lastet development of vBIOS and OCLP...
forums.macrumors.com forums.macrumors.com
 
Hello everyone. i have a serious problem with imac mid 2011. i changed the graphics card and i was able to flash the bios of the video card k2100m nvidia. After i disabled the video card in linux (metod I used to flash the GPU) using the one that works automatically with linux ubuntu. This process made sure that the pc started a very low video resolution, in fact the following restart of linux gave the icons very large. then I tried to rearrange the graphics card but nothing. now i can't even view linux from usb. everything seems to start but I see nothing. i tried to use the thunderbolt adapter and connect an external monitor but nothing happens. what can I do? maybe I would need to start a very old version of linux at low resolution to view everything through the integrated dell-imac card and then activate the nvidia k2100m from linux. Help!
 
M@Costa said:
Hello everyone. i have a serious problem with imac mid 2011. i changed the graphics card and i was able to flash the bios of the video card k2100m nvidia. After i disabled the video card in linux (metod I used to flash the GPU) using the one that works automatically with linux ubuntu. This process made sure that the pc started a very low video resolution, in fact the following restart of linux gave the icons very large. then I tried to rearrange the graphics card but nothing. now i can't even view linux from usb. everything seems to start but I see nothing. i tried to use the thunderbolt adapter and connect an external monitor but nothing happens. what can I do? maybe I would need to start a very old version of linux at low resolution to view everything through the integrated dell-imac card and then activate the nvidia k2100m from linux. Help!
Click to expand...

After flashing the card, the Linus USB has done its job.
1. Turn off the machine
2. Remove the Linux USB.
3. Plug-in the SSD with High Sierra pre-installed
4. Power it up while press and hold "Option" key on your keyboard.
5. If you see the boot selector screen, proceed to High Sierra.

That's all.
 
I can't do this becouse...
in particular I mistakenly set xorg by disabling nvidia k2100m and the screen froze on 640x480. at the next reboot I could not even restart linux from usb neither.
 
PRAM reset (command option r p) don't work for 3 times any more.
I wanted to install OpenCore but I couldn't after this ***** I did. :(
 
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