Chosen Solution
I am having problems with my GPU, I do not want to buy a new iMac if can be fixed and even better upgraded. I know I can try to find the same, except GPU, but I want to know if I can get more than 512MB on video, making opening my iMac worth it? BTW, mine is iMac 2.7ghz 27 inches with 512 video card. Update (02/01/2020) Hi Dan, Thank you again, I do not know if I could attach the image well, I try answering but I do not know where it goes, so I edit my question adding this image and looks fin on my computer.
That time that screen was like in the picture, the computer after few seconds reboot and start again. the next time was black screen and I have to shut down by pressing the start button for few seconds. I am pretty sure I am able to turn on my computer again but i want to keep it alive until i found the proper solution or replacement. Looks like I will need to get the tools to open my iMac and learn how to do it, anyway is not working, so is a good excuse to try to fix it. Its a shame because the screen is really good, those 27 inches are great for my eyes and for editing. I know is an old computer and until last year I was very happy with it. so I hope you can see the photo and might be give you a clue what can I do. Thank you so much.
Apple offered three GPU options for your system AMD Radeon HD 6770 with 512MB - P/N 661-5967AMD Radeon HD 6970 with 1GB - P/N 661-5968AMD Radeon HD 6970 with 2GB - P/N 661-5969 Now the tricky part! All of these GPU boards are hard to find as many people pushed their systems hard or failed to maintain their systems cooling burning them out. AMD & Apple didn’t help matters as both used lead free solder (relining on Tin instead). These early versions of lead free often failed from fracture and tin whiskers from the constant heat and cooling cycles this GPU board went through. AMD has long since stopped making these boards and while you can find a few from other systems as Apple wasn’t the only one using them. The Apple boards have custom firmware which you would need to burn into the EEPROM so the board works properly. If you want to salvage your systems GPU board you’ll need to take it out and clean the dust build up within the system. Cleaning off the old thermal paste and VRAM chips applying fresh paste and using thermal pads on the VRAM chips as the gapping paste Apple used was not as effective as the pads.
I have a 27" mid 2011 iMac, vga board 5770m. It failed. Can any other apple vga card fit the same vga card cooler and in the same space with me just replacing the heat sink grease?
