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Model A1312 / Mid 2010 / 3.2 GHz Core i3 or 2.8 & 3.6 GHz Core i5 or 2.93 GHz Core i7, ID iMac11,3

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two GPU options for my iMac

Why are there two GPU options (HD5670m and HD5750m) for my iMac and which of the two is best to use to replace the stock GPU. (btw which is the stock GPU?)

Update (09/08/2021)

Thanks again Dan u are a real treasure!

The hurdle I’m facing is to not knowing which of the two candidate cards were used by my system

Radeon HD 5670 512 MB


Radeon HD 5750 1GB

I have a few photos of the card but I can’t tell which one it is

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The label Broadway implies you have a Radeon HD 6970M board which is not the original GPU board.

So I'm assuming the video has failed as that's a common issue with this series.


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When you bought your car I’m sure you had a choice between a few different options! Apple does the same! It offered different CPU and GPU options over the years within each model series.

So what did Apple offer here? AMD (ATI)

So if your system is working I would leave it be!

It’s quite a bit of work to get to the GPU board and then you still will need to locate a working part which is difficult these days! An almost 22 year system parts are not easy to locate as the parts have long since stopped being made. Do keep in mind Apple’s part has custom firmware so unless you know how to burn the EEROM on the board you’re stuck looking for an Apple version of the part.

You could use what Apple put into the 2011 systems but that will take some alterations and these GPU’s tended to fail as Apple moved to a lead-free solder which tended to fail from the higher heat these produced when pushed hard (highly graphical video games or image processing)

  • Radeon HD 6770M 512 MB- Base
  • Radeon HD 6970M 1GB - Better
  • Radeon HD 6970M 2GB - Best!

And then you still have the costs and the limitations of this older GPU’s with newer apps!

Depending on what your work flow is, it maybe cheaper to get a newer used system Vs altering this system.

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genik sarà eternamente grato.
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