Amazon.com: Original Graphics Video Card for Apple iMac 2011 Core i5 2.7 A1312 MC813LL/A MC813 27 Inch Desktop PC Computer AMD Radeon HD 6770M HD6770M GDDR5 512MB 109-C29557-00 Replacement Parts : Electronics
AMD Radeon HD 6770M with 512MB performance? | MacRumors Forums
AMD Radeon HD 6770M 1GB GDDR5 MXM-A Laptop Video Card NOT APPLE!!! | eBay
AMD Radeon HD 6770M Mac Edition Specs | TechPowerUp GPU Database
Radeon HD 6770M ES | VC Collection | Сайт о видеокартах
AMD Radeon HD 6770M Video Card 1 GB | HP 216-0810001 Not Apple Brand | eBay
AMD 216-0810001 (RADEON HD 6770M) | Ogólnopolski serwis laptopów Express IT
AMD Radeon HD 6770M Specs | TechPowerUp GPU Database
Intel iMac 21.5" ATI Radeon HD 6770M 512MB Video Card