The Apple 109‑B80357‑00 ATI Radeon HD 4670 (512 MB) graphics card served as the factory-installed GPU in 2009–2010 21.5‑inch iMac models (A1311; versions 9,1 and 10,1). Built on AMD’s Radeon HD architecture, the discrete PCI‑Express MXM card enabled smooth visuals for everyday computing, HD video playback, moderate gaming, and graphical applications like image editing. Its 512 MB dedicated GDDR5 memory allowed for crisp high-definition performance, and dual-link DVI connectivity supported external display output up to 2560×1440. While not cutting-edge by today’s standards, the card offered a solid boost over Intel’s integrated solutions at the time, ensuring responsive user experience for Mac users needing multimedia capabilities. Easily removable from the slot, this modular card suits.
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