Apple A1311 21.5" iMac AMD ATI Radeon HD 4670 256MB
GDDR3 Graphics Video Card 109-B80357-00
Specifications:
Manufacturer: AMD
Brand: ATI
Part Number: 109-B80357-00
Chipset Number: 216-0729051
Chipset: Radeon HD 4670M
Compatible Models: Apple iMac 21.5" A1311 Mid 2011-Late 2011
Video Memory: 256MB
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