Chosen Solution
Hi, I’ve been hearing more and more about people upgrading graphics cards In their Imac’s. So they can run Mojave. What I’ve heard Is that you have to have metal support. I’ve seen a few video’s of guy’s upgrading to Nvidia 765, 770 even 880 graphics cards. I think this would be a big seller If you made a kit to do this. I know I would do buy one.
It would be a 27. What I’m saying Is If Ifixit figured It out and then offered it as a full kit. The cards have to be Alienware Laptop cards. I think It would be a hot seller. They offer the stock cards so It’s not that far from doing a little more leg work for a kit with say Nividia 765, which has been successfully done by more then one person. I’ve heard some people have gone as high as a 980 but, It was much more involved. The 745, 780 are very very close In size. Like I stated before that not that much further then doing a stock replacement.
The problem is you need a very specific MXM card to do it due to the need to modify the firmware. The people doing it are using Dell MXM cards and flashing modified firmware on the cards. They usually come out of Precision mobile workstations. It isn’t a cut and dry job - it is involved. You need to make sure it’s flashable with custom GPU firmware (not all are), check if it mounts right in comparison to the old card and it’s a difficult install since the whole iMac needs to be taken apart.
