ATI Radeon HD 6770M 512MB. Apple iMac 21.5" A1311 Mid 2011. Genuine Apple part, Tested & Working. Graphics Card. This is non-negotiable. This is a used item so it may be dirty / very dirty / faded / yellow'ish / scratched / liquid marked / rusty and or have stickers / tape marks so it will not be in its original condition, if it's a multiple the one photographed may not be the one you receive.
eBay