For iMac 27" A1312 Mid 2009 2010 2011 upgrade NVIDIA K4100M 4GB GPU Video Card | eBay
Amazon.com: 2GB Graphics Video Card Replacement for Apple iMac Mid-2011 27 Inch A1312 Core i7 3.4 MD063LL/A MD063 Desktop PC Computer, ATI Radeon HD 6970 GDDR5 2 GB, New GPU Upgrade Repair
Someone gave me this unwanted Mac, anyone know if you can upgrade the graphics cards on these ? Keep seeing conflicting information it's a 24" early 2009 imac : r/mac
Amazon.com: Original Graphics Video Card for Apple iMac Core i7 2.8 27-Inch Late 2009 A1412 MC507LL/A MC507 Desktop Computer, AMD ATI Mobility Radeon HD 4850 GDDR3 512MB 109-B91157-00, GPU Upgrade Replacement : Electronics
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Original Graphics Card GPU Replacement for Apple iMac 2009 Core 2 Duo 3.06 A1312 MB952LL/A 27 Inch Desktop PC Computer, ATI Mobility HD 4670 GDDR3 256MB 109-B80357-00, MXM Video Board Repair Parts:
ssd - What are my hardware upgrade options for a late 2009 iMac? - Ask Different
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For iMac 27" A1312 Mid 2009 2010 2011 6970m 1GB 2GB 109-C29657-10 Upgrade For Nvidia GTX 765M DDR5 2GB MXM TYPE-B VIDEO GPU CARD Gadgets - Newegg.ca