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User profile for user: Snooby-92
Snooby-92
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Question: Replacing graphics card in iMac 27" (Mid 2011) with a AMD 6770M (1GB)

Hi,


The graphic card in my iMac 27" (Mid 2011) failed and now I am looking to replace it. The original one (AMD 6770M with 512mb) on eBay is very expensive. However, there is the same Model with 1gb that is much cheaper. Is it still compatible with my iMac? I can't find anywhere that it is compatible but it looks exactly the same just with double the speed.


Here is the link for the cheaper graphics card: https://www.ebay.com.au/itm/252335318832


Thanks for you help.

iMac 27", macOS 10.13

Posted on Apr 19, 2020 10:57 PM

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User profile for user: woodmeister50
woodmeister50
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Apr 20, 2020 4:51 AM in response to Snooby-92 In response to Snooby-92

The link you posted was for an HP and will not work.

All iMacs use a specialized configuration and can

only be replaced by the exact model for a particular

year/model iMac. They are not generic.


Being a 9 year old computer you may seriously want to

consider a new computer since the graphics card may

just be the first in a never ending fix mode.

Apr 20, 2020 4:51 AM

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User profile for user: Jeff Donald
Jeff Donald
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Apr 20, 2020 4:59 AM in response to Snooby-92 In response to Snooby-92

It might be able to be done, but the EPROM would need to be flashed with new/custom firmware. If the flashing fails the card is junk, because it can’t be reflashed. You also need to find the firmware somewhere. It’s a real hack, not sure it’s worth the time, effort or risk.

Apr 20, 2020 4:59 AM

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User profile for user: marcosb86
marcosb86
User level: Level 1
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Apr 22, 2020 1:31 AM in response to Snooby-92 In response to Snooby-92

Go to a reconditioned one and then sell your model as spare parts.

In some cases you can change the video card but the trouble is extended also to logic board (burned, in my case) and the total cost of the recharge parts is more than buying a reconditioned Mac.


Best regards

Marco

Apr 22, 2020 1:31 AM

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User profile for user: Snooby-92

Question: Replacing graphics card in iMac 27" (Mid 2011) with a AMD 6770M (1GB)