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I own an iMac9,1 2009 20" (early 2009 20" iMac9,1) which just been recently upgraded to 8GB RAM and SSD drive as well as a software upgrade to El Capitan.

I would like to know if there is a list of graphic cards compatible with my iMac and which also has Metal support so I could use to upgrade the current one which is a Nvidia GeForce 9400.

I've found out at the time, 2009, different configuration for iMac late 2009 included the following graphics card options:

Graphics, 2.66 GHz: Nvidia GeForce 9400M, used 256 MB of system RAM RAM, supports up to 1920 x 1200 external digital display, 2048 x 1536 analog display, and monitor spanning
Graphics, 2.93 GHz: Nvidia GeForce GT 120 with 256 MB dedicated VRAM
Graphics, 3.06 GHz: Nvidia GeForce GT 130 with 512 MB dedicated VRAM
Graphics: ATI Radeon HD 4850 build-to-order option

So I understand any VGA on the previous list should work on my early 2009 iMac 20". But I wonder if newer graphic cards from newer iMac (ie 2010, 2011, etc.) would also work.

The idea is to be able to update MacOS to a more recent version while the computer keeps on being usable.

Thanks a lot.

  • The model identifier (iMac9,1) and the year of introduction (2019) for your iMac do not match. iMac 9,1 with a 20" screen was released in Early and Mid 2009 (model number A1224) with a NVIDIA GeForce 9400M graphics card. – IconDaemon Oct 16 '19 at 18:51
  • How do you plan on installing a graphics card in an iMac? – Hefewe1zen Oct 16 '19 at 19:15
  • Thank u @IconDaemon, I meant to write 2009. I'ts an old iMac. Do you know about any graphic card compatibility list for that iMac model? As you said, it's an early 2009 iMac. – Joan Oct 17 '19 at 9:30

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