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AMD Radeon RX 480 RX480 4GB MXM Metal 2 Video Card for iMac 11,1 / 11,3 A1312 27 inch Late 2009 / Mid 2010 Ventura / Sonoma - AliExpress
Restored Apple MA876LL/A All-in-One iMac with Intel Core 2 Duo Processor, 4GB Memory, 20" Display, 250GB Hard Drive and Mac OS X 10.11 El Capitan (Refurbished) - Walmart.com
Identify your iMac model - Apple Support
New Amd Radeon Pro Wx 4150 Wx4150 4gb Mxm Metal Video Card 109-c98581-10_02 For Imac 11,2 / 11,3 / 12,1 / 12,2 A1311 A1312 - Laptop Repair Components - AliExpress
Identify your iMac model - Apple Support
nVIDIA Quadro K4100M 4GB MXM3.0b Metal Video Card for iMac 11,1 / 11,3 / 12,2 A1312 27 inch Late 2009 / Mid 2010 / 2011 - AliExpress
Timetec 16GB KIT(4x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 Dual Rank for iMac (Late 2009 21.5-inch / 27-inch) SODIMM Memory MAC RAM Upgrade for iMac 10,1 and iMac 11,1 at Amazon.com