When I received my 2 imacs, I seemed to see that the cpu fan had a maximum speed of 3100 rpm, later the maximum revolutions were 2600 rpm. I thought it had been my imagination, but today one of the imacs is marking 3100 maximum rpm on the cpu fan again. Does anyone know about this phenomenon? Is it responsible for mac fan control?
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
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Thank’s for reply. I found this link. There are two modifications with resistors. In the first one two must be added, and in the second one two removed. But for me is not very clear how this mods will help to start the machine.
Thank you for answering. I need clarification though.
What is the differences between your bioses and this EG bioses like what are downsides and upsides? Do I have to modify iMac firmware for them to work? Do I still need some special OCLP modifications? And also are EnableGOP 4130 bioses too have all stream processors unlocked?
Maybe @Ausdauersportler could chime in? BTW what is ALT VRAM verions? My card is 2GB Elpida.
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SM-Bus conflicts with components on the board cause the SMC to shutdown the machine immediately, if I remember correctly.
The EnableGop versions are improved versions of the former GOP versions.
No downsides but they do provide full boot screens without the help of OpenCore.
You should first try the "normal" version and if you get strange results try the ALT_VRAM version.
If both don't work well please upload the original VBIOS of your card here.
Roger that. So if I apply mods, problem will be fixed? I found two 0402-sized 0R resistors which need to be removed, as proposed in 2nd additional mod. But with the first mod I dont know what to do, because my card looking not the same as original card from post. I think it's not possible to add this jumpers on my card. Also I attach the photos. First photo from original post and second it's my card. Any advice will be appreciate.
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Look closely - on your card the pads to solder those jumpers are simply covered in solder mask lacquer. You'll have to (carefully !) scrape this off to expose the pads to solder those jumpers. (Depending on the tools you have, you could also probably simply remove the MOSFETs next to those (non-)pads and replace the MOSFETs with jumpers.)
Also, the added 1206 jumpers in some way 'work around' the iMac12,x power up logic to actually allow the machine to, well, power up. The two 0402 jumpers you need to remove do avoid that (potential) SMBus issue.
Hi all, I bought an rx480 from aliexpress to put in my 11,3 27" 2010 imac. I use OCLP for Windows 10 and Mojave and already have a k2100m that I flashed a few years back thanks to all of the generous helpers here (and reading the first page thoroughly!).
There doesn't seem to be a definitive answer on whether a copper shim plate is needed on this to use with the 3 pipe heatsink. Sifting through the relevant posts dating back to 2020 KennyW swears by it and Ausdauersportler didn't seem to need one. I do plan to play some non-AVX games on it (hopefully Hogwarts Legacy), but don't have any copper plates. Has this been resolved? Should I buy a ~20mm x 20mm 1mm thick copper plate? I'll measure my card and heatsink myself before buying anything, but if the heatsink touches the gpu chip and clears everyhting else on the card, is there a point? The first page says 'yes or no?' in the table of working cards.
The gpu came pre-flashed and has thermal pads stuck to all of the chips except the gpu, any thoughts on if should I use them or replace them with the K5 I already have?
Thanks in advance!
Edited 4/10/23: Never got a direct answer about whether the copper plate is needed, but I noticed the first page has now recently been edited from "Yes or No?" to "No" heatsink mod is needed. That clears it up.
There doesn't seem to be a definitive answer on whether a copper shim plate is needed on this to use with the 3 pipe heatsink. Sifting through the relevant posts dating back to 2020 KennyW swears by it and Ausdauersportler didn't seem to need one. I do plan to play some non-AVX games on it (hopefully Hogwarts Legacy), but don't have any copper plates. Has this been resolved? Should I buy a ~20mm x 20mm 1mm thick copper plate? I'll measure my card and heatsink myself before buying anything, but if the heatsink touches the gpu chip and clears everyhting else on the card, is there a point? The first page says 'yes or no?' in the table of working cards.
The gpu came pre-flashed and has thermal pads stuck to all of the chips except the gpu, any thoughts on if should I use them or replace them with the K5 I already have?
Thanks in advance!
Edited 4/10/23: Never got a direct answer about whether the copper plate is needed, but I noticed the first page has now recently been edited from "Yes or No?" to "No" heatsink mod is needed. That clears it up.
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God evening. I done with mod according Your instructions. Many thanks for help. iMac successfully boot to OS, but display is black, no any picture on the screen. Maybe it’s because bios of the card must be flashed? Or it’s something else? Thanks in advance.
Does also happen for me in Windows, but it lasts a minute until the shutdown - where I didn't yet find a way to turn down the brightness from that overly high default value.
In macOS no problems so far.
You can try the attached power reduced GOP VBIOS - that one has so far already helped one user.
But - the 27" iMac users should stay away from using their machine running Windows without brightness control and the graphics card under heavy stress.
Hello,
I am in the process of upgrading an imac 12.1 to a wx4130 and planning on using ONLY win11.
The part extremely confusing is about the OpenCore, is it strictly needed for a w11 install? I ask because just for kicks to see whether w111 would boot up I installed it by doing this.
wipefs -a /dev/sda
That's the internal imac hdd. Then proceeded to install w11.
W11 does run but can't use neither Intel graphics nor radeon through native updates. Instant BSOD.
Regarding the partition scheme, Open Core goes over carefully laid partitions for OC files, macOS installation and w11. But with this install is w11 with windows install partition scheme (remember wipefs -a).
In which way does OC benefit a w11 installation?
Next question, with EnableGOP flashed on the card does it mean that I can make a w11 installation without OC at all?
It appears that the main issue with w11 is that both integrated intel GFX and original radeon aren't efi supported by w11. Does EnableGOP fix this for w11?
Thanks.
I am in the process of upgrading an imac 12.1 to a wx4130 and planning on using ONLY win11.
The part extremely confusing is about the OpenCore, is it strictly needed for a w11 install? I ask because just for kicks to see whether w111 would boot up I installed it by doing this.
wipefs -a /dev/sda
That's the internal imac hdd. Then proceeded to install w11.
W11 does run but can't use neither Intel graphics nor radeon through native updates. Instant BSOD.
Regarding the partition scheme, Open Core goes over carefully laid partitions for OC files, macOS installation and w11. But with this install is w11 with windows install partition scheme (remember wipefs -a).
In which way does OC benefit a w11 installation?
Next question, with EnableGOP flashed on the card does it mean that I can make a w11 installation without OC at all?
It appears that the main issue with w11 is that both integrated intel GFX and original radeon aren't efi supported by w11. Does EnableGOP fix this for w11?
Thanks.
OpenCore should make audio working in Windows.
And you should also note the hint about iMac12,1 at the bottom of this OCLP web page:
https://github.com/dortania/OpenCore-Legacy-Patcher/blob/main/docs/WINDOWS.md
This bios is for iMac.
If your original bios can boot the machine and display image, then there is no need to change it. Just install Windows, better yet, use a Windows-pre-installed SSD is faster than installing it from scratch.
If not, this bios might help your iMac recognize the graphic card and boot.
I understand that for Windows there are no working bios on the rx480? only for mac os. the bios that internetzel gave me works on windows. but there, as I understand it, the frequencies are reduced
I'm confused on something, I have High sierra 10.13.6 installed on my 2011 Machine with a Nvidia Quadro 4000 it's also a ++ card, Do I need to patch it with the "Nvidia Black screen patch" detailed in page 435, or does OCLP 0.62 patches it for me. And if I were to install let's say Monterey, big sur, or Ventura would I have to use the same patch or does OCLP do it for me in the post install to avoid the black screen issue?.
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Its true haha, but i try build and install opencore with amd gcn patch and dont build, but with the TUI version do, but when i select the sdd to boot macos the screen show purple and white squares with “m5100-BFR-GOP” but my gpu have hynix AFR and with “M5100-AFR-GOP” vbios dont show the opencore boot picker and safe mode either
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That VBIOS doesn't directly reduce the frequencies, but it reduces the maximum allowed power draw of the card - throttled frequencies maybe part of how the card achieves a certain maximum power draw.
And it should work for both Windows and macOS in a similar way.
Perhaps different VRAM type, try another vBIOS if available.
The compatible vBIOS is supposed to get you to Mac OS High Sierra desktop, without Opencore. I guess.
On my iMac 2009 27" and M6100, I prepared the OCLP EFI before assembling the GPU, so I don't really know what might happen without the OCLP pre-installed.
this bios is not working properly. screen sometimes turns off while working in windows
I have a second video card s7100x so it works well in windows