Follow this IFIXIT guide to get the logic board out: [https://www.ifixit.com/Guide/iMac+Intel+21.5-Inch+EMC+2308+Logic+Board+Replacement/1852|iMac Intel 21.5" EMC 2308 Logic Board Replacement].
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Follow this IFIXIT guide to get the logic board out: [guide|1852|iMac Intel 21.5" EMC 2308 Logic Board Replacement].
Your system came in two configurations:
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* MB950LL/A, which has a NVIDIA GeForce 9400M graphics processor that shares memory with the system
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* MC413LL/A, which has an ATI Radeon HD 4670 with 256 MB of dedicated GDDR3 memory.
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Here's one source for the part: [http://www.ifixmaccomputers.com/661-5308-video-card-ati-radeon-hd-4670-256-mb-21-5-inch-imac-late-2009|661-5308, ATI Radeon 4670 Graphics card] for a price reference.
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* MB950LL/A, which has a NVIDIA GeForce 9400M graphics processor that shares memory with the system (does not have a removable card)
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* MC413LL/A, which has an ATI Radeon HD 4670 with 256 MB of dedicated GDDR3 memory. (has a removable MXM card).
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Here's one source for the part: [http://www.ifixmaccomputers.com/661-5308-video-card-ati-radeon-hd-4670-256-mb-21-5-inch-imac-late-2009|661-5308, ATI Radeon 4670 Graphics card] for a price reference.
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Remember only the MC413LL/A models has a removable MXM card the other will require a complete logic board swap.
Follow this IFIXIT guide to get the logic board out: [https://www.ifixit.com/Guide/iMac+Intel+21.5-Inch+EMC+2308+Logic+Board+Replacement/1852|iMac Intel 21.5" EMC 2308 Logic Board Replacement].
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Your system came in two configurations:
+
* MB950LL/A, which has a NVIDIA GeForce 9400M graphics processor that shares memory with the system
+
* MC413LL/A, which has an ATI Radeon HD 4670 with 256 MB of dedicated GDDR3 memory.
+
+
Here's one source for the part: [http://www.ifixmaccomputers.com/661-5308-video-card-ati-radeon-hd-4670-256-mb-21-5-inch-imac-late-2009|661-5308, ATI Radeon 4670 Graphics card] for a price reference.