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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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Finally I was able to successfully swap my GPU to a pre-patched GTX880M from AliExpress. So far so good. I went straight to upgrade to upgrading to Big Sur using the OC legacy patcher and the system runs smoothly.
However, I'm having a sleep issue. The system goes to sleep but does not come back and I have to reboot it. Not sure but I think this more related to OC than the graphics card? Is this a known problem?
Thanks
However, I'm having a sleep issue. The system goes to sleep but does not come back and I have to reboot it. Not sure but I think this more related to OC than the graphics card? Is this a known problem?
Thanks
Have you tried running any benchmarks? It is very likely your iMac will simply reboot from time to time - you have mounted a power hungry GPU into a 21.5' iMac, if your signature is correct. NVIDIA table on post 1 clearly states that this is an incompatible combination.
So
Sorry, I've corrected my signature. I'm running it in a 27" model with 3 heat pipes installed...
May be your panel type is a non standard. Find it out using this and post your type.
Yes, there is no BacklightInjector any longer, @khronokernel found another way to achieve the same mod using a DeviceProperties entry with OCLP.
I am not quite sure if this new solution will work in case you come up with a new formerly unknown display type. In the old times we had to add this new display type to the BacklightInjector plist.
EDIT: But this does only effect the full range of backlight, not the backlight control itself.
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For what it's worth on my iMac 12,2 with a K3100M I get a null answer to the panel type. (I too have an issue with sleep and figured it would be worth looking)
Code:
$ ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" |xxd -p -r | strings -6
$That ioreg output may not be 100% way to check LCD type, because running this on my 27" returns just nothing.
Will follow @nikey22 posts them - maybe find something I could hook up to and try to solve the problem...
Hi guys!
Just finished the update of my iMac 27, Mid-2010 - i7 with the QUADRO K2100M nvidia. All went OK. It took several hours because I was enjoying every step and wanted to be sure for anything.
A big thank you, to all of you that help us to do the upgrade with the instructions, the custom ROMS and your experience.
I wanted the least hardware modifications so I choose the K2100M as the most powerfull without the need of the 3pipe heat sink. I also did the temp sensors transfer (ODD to heat sink and GPU heatsink to ODD) witch needed to make the wires a little bit longer - so the need of some soldering. I also added the macs fan control for safety.
Only the brightness control is not working but I thing it will with OLCP and big sur.
I did not upgraded the OS - still in high Sierra. I'll do it tomorrow or the next day cause it also needs some extra hours. i'm attaching some photos.
Valley test: 25.2FPS, 1053 Score.
Geekbench5 Metal score: 2402.
Just finished the update of my iMac 27, Mid-2010 - i7 with the QUADRO K2100M nvidia. All went OK. It took several hours because I was enjoying every step and wanted to be sure for anything.
A big thank you, to all of you that help us to do the upgrade with the instructions, the custom ROMS and your experience.
I wanted the least hardware modifications so I choose the K2100M as the most powerfull without the need of the 3pipe heat sink. I also did the temp sensors transfer (ODD to heat sink and GPU heatsink to ODD) witch needed to make the wires a little bit longer - so the need of some soldering. I also added the macs fan control for safety.
Only the brightness control is not working but I thing it will with OLCP and big sur.
I did not upgraded the OS - still in high Sierra. I'll do it tomorrow or the next day cause it also needs some extra hours. i'm attaching some photos.
Valley test: 25.2FPS, 1053 Score.
Geekbench5 Metal score: 2402.
Attachments
Hi @internetzel Using amdvbflash graphics tool with CMD command to refresh Dell original M5950 HD6770M shows programming success, test GPU-Z tool shows VBiOS information is still blank no correct reading of VBiOS information written by programming. I guess it's still a hardware problem.
Attachments
amdvbflash shows valid version and product name for the EEPROM contents - so I'd say that flashing has indeed been successful. It doesn't show anything for the new VBIOS you are flashing, but if I remember correctly that happens when old and new VBIOS have identical version and product name.
As the translation into English isn't very clear, I maybe didn't understand your actual problem yet. So you try to flash the VBIOS but the old VBIOS stays in place?
Maybe you're trying to flash the VBIOS in an HP machine? Many HP machines will always use and load the VBIOS from the system firmware and not from the graphics card itself - and it is VERY difficult to change that VBIOS in the system firmware.
My friend has a 12.2 imac 27. The k3100m video card works perfectly in High sierra. Sleep-works perfectly. It works perfectly in Big Sur! Do you have OC installed correctly?
Anyone can assist in fixing wake problems? I installed Big Sur with OCLP and the system does not wake from sleep over USB. If I press the power button it will startup up the fans but not come back so I have to restart it.
On the gitHub thread I read that @Ausdauersportler mentioned an additional kext maybe required (AppleIntelSNBGraphics.kext)? Can anyone provide more info on that?
As far as iGPU is concerned: It is turned off. Still wake troubles...
I'm pretty sure this is a know problem which can be fixed?
Thanks a lot!
On the gitHub thread I read that @Ausdauersportler mentioned an additional kext maybe required (AppleIntelSNBGraphics.kext)? Can anyone provide more info on that?
As far as iGPU is concerned: It is turned off. Still wake troubles...
I'm pretty sure this is a know problem which can be fixed?Thanks a lot!
I may be thinking of something slightly different but I know that a mods team in Malaysia HAVE made a special connector that fits in place of the imacs internal dvd drive and allows the connection of an external GPU via the dvd drive PCIE connector.
The item is shown and discussed at 14.45 in the following clip:
It seems that this is the beta test from May of this year and these guys certainly know their way around all kinds of Macs. This project certainy shows promise and their other videos explain more about some of the obstacles they've had to take into account to get this to work at all...
I don't have OC installed because I am not trying to run an unsupported OS... on the list of things to do but busy with other stuff. (I have a 2010 11,3 imac that I'm going to try to put a GTX880 into and upgrade the hard disk to an SSD that is in front of more work with this imac 12,2. I just don't allow it to sleep and it's good unless I have a power failure and then rebooting takes a number of button pushes to get it to come on.
I also have a green PCB 1GB version that had no bios chip, I soldered one from a dead 4670 and put it in the correct vbios but as you experienced already it is not read like the card still has no bios chip as before, I suspect it has some missing stuff, resistor or whatever on the bios line, if you find a fix please let me know.
On the other hand I have 2 K2100m that have the so called black screen bug. they work just fine with windows but not with any version of OSX/macOS unless I press alt on boot to fire up boot manager. I think there is a "bug" in the VBIOS.
Before anybody ask, no, I do not use OC or plan to use it, so I am looking for a proper fix, thanks.
As OCLP has solved this issue, I don't think any other "proper fix" will be researched in the future.
I understand but this is a very wrong approach, this shouldn't be done like this, for example DSDT can be patched directly in the BIOS, I don't need a bootloader to do that for me and add possible other zilion bugs...
I will look on OCLP code to see how is implemented, rather I will write a simple efi driver(if is not possible to do it in the ACPI) and put it into the BIOS to solve this then use a bootloader.
Great! I will be very grateful to receive your vBIOS!
Thank you for your contribution to this thread.
The correct approach would be reading the first post, again!
A so called "proper fix" has been mentioned there half a dozen times, or more. A simple plist modification.
You really have a fetish with the first post, that is not a proper fix, a proper fix would be at VBIOS level or BIOS level, but as usual instead having a chat with REAL information we lose time pointing to stuff that I saw already.
Sorry if my questions looks like a n00b one but I really seek for dev answers...