During the next 4-5 years the software just eclipsed what the hardware was designed to do (i.e. First is the hardware on Macs is designed to run together, Apple designs and builds computers to run well extremely well with the hardware and software they provide. I paid ~300$.No screen anyway. If you want to replace or upgrade an internal hard drive in your iMac, an Apple service provider can do it for you. I'm going to do that tomorrowI found a cheap GTX 260 from an Alienware Notebook.Jason, are those instructions for before or after GPU replacement? have successfully flashed a PC desktop version of this card for Mohave on a 2010 Mac ProThis is the Dell / Alienware card hereAnders - the answer was specific to your machine and the problem it's having and a possible solution. Varying from that formula normally does not help. I bought the card from eBay and the seller said he pulled the graphics card right out a brand new Clevo laptop. The card works with full acceleration and passes Apple Service DiagnosticsHello Allen, I was wondering if you could give a step by step guide for the flashing process please? There is tape to prevent, but it was worn/melted slightly (below).is there anywhere a tutorial about this ? iMac computers with affected video cards were sold between May 2011 and October 2012. This is something to deal with later.As to re-balling the GPU chip to use better solder thats an option but the underlying issue still remains overshooting the thermal window of the system.Here is the fan for the back of the iMac case: ELUTENG-Cooling-Cabient-Ventilator-Receiver|A simple cardboard V shaped vent cover and package tape is all that you need. Interesting that you feel that those with multiple failures are down to pushing machines too hard. My suggestion is before you go any further, evaluate what your needs are. Will those work?Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2I'm have iMac 27 2011 i5 3.1GHzhow is this GTX running for you a year later?So for me this is a dead end my sport friends. And I am wondering is it compatible with previous 2009-2010 imac models? Where do you live? (one above the other) You need to flash the top one as shownHey Allen, is this still working for you? Copy-pasting a paragraph from Apple support that answers neither of the questions at hand - is not helpful.I don't know even why any lawyer doesn't see the business in this easy possibility to get a lot of money from Apple??? Which leaves your in unsupported GPU in the dark so you don't have a working screen whatsoever. Or did you do something after installation? If I could turn the graphics up just a bit more it would help with realism.but the i3-550, or i5-680 (73 watts TDP) can be upgraded to a 4 core i5-750S or i7-860s/870s (82 watts TDP)Solution is getting the card reballedThese cards are known to be buggy, Apple/AMD used lead free solder,The i7-870 (95 watts Thermal Design Power) is not economically upgradable (i7-880), Go up the ladder, force Apple to do what is right. It will be working? "scp filename pi@ipaddress:/home/pi"IF IT IS LISTED: Change the string to <string>none</string>Get your BoardID by running this command in terminalI know I've been lucky but it is still not nice to know I have 2 years and 9 months to go now before my iMac (which is otherwise perfect) dies again, and presumably at that point it will be declared vintage and parts unavailable.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.Video card in late 2009 iMac still going strong after 2.5 years!On the card, with the MXM connector facing downwards and the ATI chip facing you. So an iMac from 2010 likely won't be able to even fit a GPU from 2009 or earlier and 2011 and later.