AMD

Apple iMac 24" A1225 ATI Radeon HD 2600 Pro 256mb Graphics/Video Card

Apple iMac 27" A1312 ATI Radeon HD 6970m 1GB Graphics Video Card Mid-2011 (661-5968)

iMac 21.5" A1311 ATI Radeon HD 6770m 512mb Graphics Video Card 661-5945 Mid-2011

Apple iMac 21.5" A1311 Mid-2011 ATI Radeon HD 6750m Graphics Video Card

iMac 27" A1312 ATi RADEON HD 4670 Graphics Video Card Late 2009 HD4670