"Would a 6970M card for a Dell Alienware laptop or another card with the same chip as one of the iMac 2011 models work?'I found out Apple uses special firmware and for a card to work it needs an EFI flash with Apple firmware.A card without Apple firmware will simply result in a black screen.A friend of mine did suggest I could remove the BIOS/EFI-chip from the original board and reflow it onto a cheaper card - but that will probably be too complicated for a lot of people and I already had a new card on the way.Cards that already have Apple firmware (pulled from iMacs) are interchangeable though - I upgraded from the 1GB 6970M to the 2GB version. I7-2600K).iMac 27 i5 2.: Upgrade CPU to i7 2600 (non K)Nov 28, 2012 IMac 2011 officially supports only Sandy Bridge CPUs. Only CPUs supporting socket LGA 1155 can be used. Limit the speed of any SSD to the equivalent of a 7200 RPM HDD, at best.1.There are 2 cards that I have found which offer boot screen and Metal support. Special credits must do to DosDude who created the Mojave and Catalina Patcher tools to allow people to run these operating systems on their older unsupported Macs.Unfortunalty with these iMacs, It can be done but requires a more up to date graphics card. I paid ~300$.Lastly, as pointed out, if you have an iMac 27" Mid 2011 with issues, the GPU is most likely the cause and Apple will fix it if it's no older than four years, because it's a recognized issue.Apple refused to fix this one because it was sold in 2011 but if you want to fight Apple, maybe that'll work too - I chose to fix it myself instead.Good luck and save yourselves a few quid.Note, As this guide is now over 3 years old, time has marched on and not been kind to our 2009-2011 iMacs, The main issue we are all facing is the lack of Metal support with the AMD cards (If they haven’t failed already) As most of you are probably all aware, there are some great developers on the scene that have devoted a lot of time into keeping our old unsupported Macs on the road.
![]() Apple don't care about customers even they paid a lot to buy the flagship of Apple. I will edit the original post to bring it into the 20’sSame here in Hungary. A guide will also be provided for those that wish to flash the cards themselves. If there is enough demand for this I may setup a store to sell pre flashed MXM cards for these systems. The size “A” will work in both.These of course need to be flashed before they will work correctly. ![]() Cpu For Mid 2011 I Free Solder UsedI guess we were just lucky.I do think the AMD Radeon 6970M Video Card tends to run hot and the lead free solder used was just not able to handle the heat. The complete, used, same, working Imac is 6-7-800 Euros, and used card is 300 euros.Is there somebody with used card experience?Dave W - Sorry to hear you got a double whammy. Now I have an 27" Imac I7 8Gb Ram and cant't use. I don't trust Apple anymore. Pes 2013 for macDuring the next 4-5 years the software just eclipsed what the hardware was designed to do (i.e. Back then (2010-11) the hardware was still trying to catch up with the software. That maybe your answer as well.Remember we have a bit of 'Ying-Yang' between the hardware and the software. While I did focus on the user side a bit in my answer in the comment it still the root issue for many failures across all systems.We addressed the cooling side of the issue in our iMac's by using TG Pro in turbo mode to push the cooling sooner so the thermal threshold of the solder breaking down is not hit as often or for so long. While I would still love to see more powerful CPU's the hardware design limits what can be used until Intel offers lower power & heat version of CPU's which are coming this fall in the Xeon family. The dual AMD FirePro D700 systems are starting to show their age and just can't push 8K (4320p) which is now the benchmark.Surprising! The CPU's are not whats holding the system back. We really need better onboard graphics and video output. Now we are waiting for the Mac Pro upgrade hopefully it shows up this year. Even still the iMacs are not heavy duty gaming machines, they are a mid tier system.If you want a heavy duty gaming system I would have said the Mac Pro would have been my choice a few years ago. Sadly, dedicated GPU's are just now catching up with the CPU's using less power and heat.If you look back in the trade rags you'll see it was Apple who pushed Intel into addressing the power & heat of their CPU's as Apple was struggling designing the slim systems of the iMac's with the more powerful CPU's & GPU's.
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