@Ausdauersportler, @internetzel gave me the RX480 firmware you both use. It is working beautifully in my rig but I have no signal on external display. internetzel doesn't use external. Do you have external signal?
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iM 4,1-14,4 2011 iMac Graphics Card Upgrade
- Thread starter MichaelDT
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As someone who has attempted this - I would STRONGLY advise against it. A rotary tool is much more effective and precise. I found there was too much kickback with a standard drill to keep the material removal in the specific locations.
I did the modification with both my power Drill and angle grinder.
The drill is difficult to control. I nearly created a hole on the copper pipe once.
The angle grinder is much easier to work with and extremely fast. Just 5 min, comparing with 30~50min with the power drill.
Take a look at my experience, took the heat sink to a milling company and they did it for free just because they loved the cause.
That is, with the help of an angle grinder you can make such grooves?
Did you use discs with a diameter of 125mm and a thickness of 2.5mm?
The photo didn’t survive, how did you do it with the help of an angle grinder? Did it work out neatly?
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I used 100mm disc, thickness is 1mm or less, because it was a cutting disk. Keep the disc perpendicular to the heatsink surface. I think you can use the desk grinder also, with a small grinding stone (100mm or smaller)
Neatly? I guess so. At least it is better than the ones carved by power drill. Not as beautiful as those gone through a milling machine, but acceptable.
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Excuse me for my English, I'm using a Goole translator,
I'm having problems on an iMac 27 Mid 2011, where I put an Amd Fire Pro M6100 video card. I need to reset the Pvram for the screen to work, and when I run a video application it freezes, and the GPU is always at 600Mhz.
I'm having problems on an iMac 27 Mid 2011, where I put an Amd Fire Pro M6100 video card. I need to reset the Pvram for the screen to work, and when I run a video application it freezes, and the GPU is always at 600Mhz.
Thank you for information. You did great. We need to take note and keep in mind.
Why don't you install newer macOS?
My family members only use Office Application and Web surfing. There is no need for newer Mac OS. Better support for Isight Camera and microphone (less security)
Actually, I was too lazy to install newer Mac OS on those machines.
Then I didn’t understand at all why you installed new, more powerful video cards.
After all, video cards are changed most often in two cases:
1. Transition to new macOS.
2. For games or for video and photo processing.
On my 3 iMacs, only the first one has its GPU replaced for upgrading purpose.
1. I like more VRAM, and I could sell out my obsolete HD5670 for half the price I bought my WX4150. (50$ vs 80$) I learn a lot about GPU upgrade on this iMac 2010.
2. I bought the first iMac 2009 with a half-dead HD4850, and I bought the Quadro K1100m for 20$. Later on, I sold the K1100m for 60$, and added some money, I could get a hold on the Quadro M4000 (99$), it was much nicer than another HD4850 with 512MB VRAM.
3. For the second iMac 2009, its HD4850 failed on me. And the Firepro M6100 was offered for a very reasonable price (45$ or something)
And I'm a Windows user, actually. All the iMacs are for my wife and kids. Love them because of the big 27" display.
There is something really weird going on with my Mid 2010 (11,3) iMac and I can't seem to fix it at the moment. I've upgraded the GPU from an HD5670 512MB to a FirePro M5100. After installing the card and booting into the OS. Hardware acceleration was not working since the "Drivers" are not installed. After running OpenCore Legacy Patcher 0.6.8 and running the Post-Install Root Patch it detected the Graphics: AMD Legacy GCN. After clicking Start Root Patching it started patching but after booting the only screen I get is a Yellow screen or Purple screen. When not installing the drivers or booting in safe mode I am able to use the Mac but without hardware acceleration. Anyone has an idea?
Is this maybe one of those cases where you need to have something plugged into the displayport, even if it's just a dummy connector?
Good morning, I have a problem I bought 2 k1000 for imac 2009 27. Assemble and they don't go. I try them on a 2011 and I can flash them and they work. In 2009 I realized that it is the bootroom problem that has the 63.0, I changed the bios stack put back the original board, many resets alt+p+r, high sierra from clean installation. Security updates done... the bootrom remains the 63 and does not start with the k1000 , not even the boot sound, and not even the sound that are missing ram without
If you use OPC 0.6.8 and MacOS Big Sur 11.7.8 and disable sleep mode everything should be ok
If you use OPC 0.6.8 and MacOS Big Sur 11.7.8 and disable sleep mode everything should be ok
Good afternoon, everyone.I decided to flash the efi bios with the ch341A programmer, before that I removed the BR2032 battery.But it didn't work out how much I tried, the clothespin didn't want to be installed on the chip.I got tired of it and decided to put everything in its place.After switching on, the cyclic reboot without sound, turns on for 1 second and restarts.Please help me with advice.
You (very likely) corrupted your firmware with these multiple write attempts. Try to flash with battery installed and even power connected. You should have read the flashrom log on the terminal to confirm what happened during your countless write experiements.
The USB flash clip cannot provide the power for the complete system board during flashing. There is always power drain and so there is no enough power left to complete the BIOS flash in some cases (actually this happens quite often).
If you cannot rewrite the modded BIOS image you have to desolder this BIOS chip and flash it separately.
This way not power drain can happen.
Does not work.
I tried multiple things. Bought this card: M5100
The iMac M5100 version, which is already flashed. It's the red M5100 version.
After installing the Post-Install OCLP patches it detects my GCN AMD Videocard. OpenCore then asks me to install these patches for my videocard which goes perfectly fine. Then after booting normally I boot into a dimmed yellow, sometimes purple screen (can only boot in SAFE mode to get a screen). Not showing anything at all, just plain purple/yellow. However my iMac shows it's an HD 7xxx card with 2GB of VRAM (which sounds correct). After reverting the root patches and then rebooting the Mac, I am perfectly fine booting normally into MacOS Ventura however it then says its a "Generic VideoCard with 14MB of vram". Tested multiple versions of MacOS.
SKhynix BFR version btw.
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Not quite sure what I did wrong but I flashed the SKhynix BFR version btw. M5100-EnableGop91-LVDS-HynixBFR to the videocard, since it has the BFR memory. (SKhynix, H5GC2H24BFR T2C 441V).
Accessed the videocard now again via SSH using GRML Linux. I'm not quite sure what vBIOS is need. I thought that the HynixBFR version was the correct one. Can't seem to connect to the Mac anymore. Getting: Connection Refused on Port 22.
Update 18/09/2023
Okay fixed the SSH connection. Installed multiple rom's:
- M5100-EG2_HynixBFR_adj.rom, did not work, no screen, no bootpicker, all black.
- M5100-EnableGop910-LVDS-HynixBFR.rom, did not work, no screen, no bootpicker, all black.
- M5100-GOP_HynixBFR.rom, does work, giving screen, can see the boot picker, but when booting into MacOS I've got a Yellow screen again, sometimes it's purple. Unless when I boot into Safe Mode. It is showing my GPU as an HD7xxx with 2GB vram tho.
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