Need to replace graphic card. 2012 27" iMac Aluminum AMD RAEDON 6779M with 512 MB of Dedicated GDDRM Memory. Will keep the Mac OS on it, or Install Linux (I have Linux Disc prepared for Mac install) Might dual boot. I understand this card is problematic. Seen prices used from $24 to $100. Also saw new from China $200 would prefer new as I read comments about people going through several used ones. That's a lot of trouble to do several times. Is there an upgrade for this card? Are the new Chinese ones any good? New Old Stock?
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