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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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Lady Titan, it's more complicated than you think!
These new GPU upgrade for replaceable iMacs GPU are in experimental status. there is no guarantee nor 100% it's all your own risk!
here is not Apple company, here are some good heart people doing list of some new experimental for goods!
so experimental status are usually hard! and many unknown questions are unanswered..... because it's unknown or needs scanning the issues. it's not a simply to say "hey computer why don't you work with my new GPU?" 😄
but did you know there is one more important thing, there is no stable CoronaVirus Vaccine treatment! it's probably about 10 months and the virus is still spreading around the world! nearly about 1 million people are dead!
millions of people care about to build and make CoronaVirus Vaccine.
Good people here answered that it took at least 6 months, latest replaceable GPU iMac is 2011 but we're now 2020! and Apple does not care!
people here have pleased not to ask when or duplicated questions, but there are really thankful to post the new bugs and issues if you did exactly what they listed what to do with new GPU. we need to respect them, they need help.
it's Apple that made trouble, why can't you simply change HDD 3.5" without OWC HDD sensor? why not upgrade GPU when it's already possible? peaceful Safety? Apple charges people! if iPhones were at reasonable price, they would rule the world!
ALL INFO - Recommendation - WITHOUT WARRANTYno Lady Bonus possible !!!
Hmm, if I read your configuration with Core i7 & GTX880M the power consumption is for sure at
a high level. This should be one of the reasons the display went dark at maximum brightness, but
also you should install the KEXTDrop App to install the modified AppleBackLightFixup.KEXT also as
AppleGraphicsControl.KEXT - everything found as link on page#1 of this threat !
Control or disable all Hibernate / Sleep / Deep Sleep modes with Terminal command "pmset"
- PMSET for Beginners.
- Buy alternative USDT PC for WIN10 Games & Apps (as an iMac runs WIN10 it's same as
you want to drive Off-Road with a Lamborghini) - better use High Sierra for Apps and macOS
Mojave or Catalina for metal based Steam Games (2. partition on HDD / SSD).
- Native WIN10 Installation without using BootCamp (disable macOS HDD and boot with
WIN Install DVD or bootable WINDOWS USB Stick)
For testing various KEXT files to solve your machines different functional problems (?)
KEXT install for beginners
And last and least (as I recognise it in myself) - the worst case sits in front of the machine with
different levels of knowledge - put a roadmap in your head, no chaos - sometimes it's good to
be suitable for multitasking. The GTX880M ROM is in experimental status, so everything can be
happen with different actions - don't trust your data to video card together with unofficial macOS !
- so here's what I've done, I still found Windows 10!!! it was difficult but I did it! through Catalina, I rebooted to Mac recovery mode via the Internet, installed high Sierra, opened the hackintool application, disable getkeeper then in the terminal I led the sudo nano command to info. plist < key>UEFIModels</key>
- <array>
- <string>iMac12,2</string>
- </array>
- <key>USBBootSupportedModels</key>
- <array>
- <string>iMac12,2</string>
- </array>
- deleted my model < key>Suppliednonwin10models</
- I created a bootable USB flash drive through the SD card card reader, added a partition and formatted it in fat 32, rebooted, in the boot menu, inserted the SD card, then skipped the activation code, formatted the disk and installed Windows, then declined the offer to connect to the Internet, after which I got to the desktop Windows 10!!!! Bootcamp drivers were installed automatically, except for sound. maybe something else doesn't work((( I don't know.... in the display settings, there was a brightness slider, the display worked at half power, then I installed the activation key and went to the NVIDIA website, downloaded the gtx880 driver and as soon as the driver was installed, the display backlight went out, I lit the flashlight, the matrix works)) the drivers got up normally, it looks like the screen brightness is back!!! and it's blinding from the power) I noticed that the brightness slider in the display settings is gone((( and now I'm loading Windows and it works, but how do I change the brightness power? about Lamborghini.... I'm sure this case the Mac will remain legendary! it has so much free space))) to add and upgrade, about the coronavirus! friends I hasten to please you the vaccine has been available in Russia for two months! the first country to receive it is Belarus! )) Russian citizens have already received the vaccine! and your authorities only think that they are the power) we are the first to fly into space and the first to make a vaccine) everything will work out! the main thing is to be confident!
Curious if anyone else has this happen while watching youtube videos or on websites with images.
I work a lot with adobe and websites and I don't notice this on the adobe programs however, when the finished product is uploaded or i watch youtube videos this appears.
Is this normal with Catalina or did I miss a kext or something?
I work a lot with adobe and websites and I don't notice this on the adobe programs however, when the finished product is uploaded or i watch youtube videos this appears.
Is this normal with Catalina or did I miss a kext or something?
The first post describes what you have to do in order to be able to adjust brightness at all (not possible with all cards).
That method cited by you is for correcting the brightness levels for 27" displays when the brightness controls don't allow adjusting to the normal levels. On 21.5" displays the brightness levels should be OK.
Do you have too low or too high brightness on a 21.5" display?
I also have the same problem with a k4100m.
With internal LCD it wont boot...
Still didn't get a solution...
Since I have three such K4100M cards running one must assume it is your card what causes the trouble.
And I would be nice to see your config posted somehow, probably in the signature...
Hello
I am looking for a cheap card (functional of course) for a iMac 21,5" 2011 project
> K610M or K1100M or K2100M let me a pm if you have one to sell or a link thx
Ho I'm living in France it might be important
I am looking for a cheap card (functional of course) for a iMac 21,5" 2011 project
> K610M or K1100M or K2100M let me a pm if you have one to sell or a link
thx Ho I'm living in France it might be important
Just upgraded my iMac 21.5 2010 from i3 to i5 and a k2100M 2GB successfully.
Just FYI for those of you with a GTX880M.
When I purchased the card, I noticed that the card X-bracket has four rivets at the corners that protrude upwards from the GPU-die face:
If you look on Ebay, you will see many examples of this kind of X-bracket arrangement for the GTX880M, some even on GTX780M cards. This is just my personal experience with it.
During the initial stages of testing my rom I discovered that the Kepler GPUBoost was always kicking in and throttling down the TDP to 'base clock' despite even a small load. GPUBoost will increase clock speeds in steps until the predefined power target is reached, which in our cases is always around 100watts no matter what. Valley score screens were choppy and I was getting random shutdowns. I thought I had a bad card.
One week of frustration later, I discovered that the rivets were keeping the GPU-die surface from contacting properly the heatsink surface. I removed the rivets and used M 2.5mm and length 8mm screws to secure the X-bracket to the heatsink:
GPUBoost now ramps up/down dynamically based on load and gives full boost up to 100Watts when demanded.
Insanely great!
When I purchased the card, I noticed that the card X-bracket has four rivets at the corners that protrude upwards from the GPU-die face:
If you look on Ebay, you will see many examples of this kind of X-bracket arrangement for the GTX880M, some even on GTX780M cards. This is just my personal experience with it.
During the initial stages of testing my rom I discovered that the Kepler GPUBoost was always kicking in and throttling down the TDP to 'base clock' despite even a small load. GPUBoost will increase clock speeds in steps until the predefined power target is reached, which in our cases is always around 100watts no matter what. Valley score screens were choppy and I was getting random shutdowns. I thought I had a bad card.
One week of frustration later, I discovered that the rivets were keeping the GPU-die surface from contacting properly the heatsink surface. I removed the rivets and used M 2.5mm and length 8mm screws to secure the X-bracket to the heatsink:
GPUBoost now ramps up/down dynamically based on load and gives full boost up to 100Watts when demanded.
Insanely great!
I immediately did so! from 6970 is not an option at all)) any other information? for example, how to deal with the buffer? by the way, I noticed that on Catalina there are fewer glitches, and on high Sierra the image is a little worse and this is very noticeable, on Windows 10 I still did not understand the problem with the display ((by the way, respect to you!!!!! you're the best!!!!
Attachments
hi, thank you for all your efforts
would i need a modified driver for the gtx880m card once installed on imac 27 "mid 2011 to make it work under windows (bootcamp), or just download and install the original driver from from the nvidia site
would i need a modified driver for the gtx880m card once installed on imac 27 "mid 2011 to make it work under windows (bootcamp), or just download and install the original driver from from the nvidia site
You can use the Regular Nvidia Driver's (or the version I screen shot) and then follow the Reg-edit guide for Fixing Backlight control in Windows.
Managed to get it working - thank you.
I think first time around deleting the WhateverGreen and Lilu kexts, I never carried out the full steps to rebuild and relink everything.
In an attempt to reinstall Catalina with the dosdude installer I have the following issue. I can only get a visual when resetting the NVram, or startup using the option key for the bootloader and choose the setup or OS to start.
I red that with the 2010 model you shouldn't auto patch. so i created a new installmedium. But then i have no wifi, and no visual unless i reset the nvram or use the bootloader.
It's regarding my 2010 imac 20.5.
looking for clues.
I red that with the 2010 model you shouldn't auto patch. so i created a new installmedium. But then i have no wifi, and no visual unless i reset the nvram or use the bootloader.
It's regarding my 2010 imac 20.5.
looking for clues.
Yes, go back to the first post and read about the common problems...welcome to the club!
You have to read the @dosdude1 part, too.
Sorry, my bad! I had a long day sorting out the heatsink/X bracket for the 780m
Got my machine back running using my old 6970m and managed to copy the crash report while the 780m was running in there - I have attached a link to this. Maybe it will help?
Mac Crash Report 780m.docx
drive.google.com
My boot ROM is: 63.0.0.0.0
I have done 2 PRAM Resets, I will try this again when I fit the 780m back
Thanks for your help!
No, it still just you. The other two systems do not boot with the internal LCD connected, your system does boot and cannot recognize the non working card. The only thing in common is all systems do not work.
I am still sure your card is simply dead, while the others may face an (additional) unknown problem. You did not get a single live sign from your card.
Reinstalled applebacklight kext just incase it didn't merge over when I clean installed catalina and changed the resolution from default for display to 2560x1440 and everythings back to normal
Interesting! I have only been able to screen share once or twice as I think it keeps crashing, as most times it will not connect to screen share
Hi! Thank you for responding
i can't find the screen shot for nvidia driver,
i have another problem if you can help me with this too, i have no sound on windows, i tried reinstalling the drivers with no success knowing i used usb for installing windows 10
[
Have you tried to search this thread yourself to get answers? Hint: OpenCore...
Yes, I found this part: "All is working as intended if you can hold the "Option" key at startup and get a boot picker."
Not really pretty. Are there examples of NVIDIA cards where this doesn't occur?
for the black screen, there is a script mentioned from iFixit, but the commentlines says it's for Sierra. Also for Catalina?
the kext procedure is only for 2011
I'm stuck at the point where I need to add the board-id to the kext.
My board-id: Mac-F2238AC8.
Got into the kext, but the it's not clear where to add my board ID. In the <Dict> part there are keys mentioned, like my board ID.