Amazon.com: Tarjeta gráfica de vídeo original para Apple iMac finales de 2009 A1311 Core 2 Duo 3.06 21,5 pulgadas Desktop PC MB950LL/A MB950, AMD ATI Radeon HD 4670 GDDR3 256MB, MXM VGA
iMac 2009 to 2011 (A1311/A1312) Upgrade Guide – MacintoshMen
Late 2009 iMac 27" Video Card Repair [4850 Bake] - YouTube