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My Graphics in : ATI Radeon HD 4670 with 256MB of GDDR3 memory (http://support.apple.com/kb/SP576?viewlo…) Can I upraded whith the last graphic cards on Imac ? For example : AMD Radeon HD 6970M with 512 Mo or 1Go GDDR5 ? Where I can buy it ? Is it a mobility card or a desktop card ? Thank you
You got the high end card for your machine. The 24" MXM machines are upgradable but I have not found an upgrade for the 21".
Can someone add to this post… I have been told you can use a gtx 756m mxm?
