回答“What GPU's are compatible with iMac 27" 2011?”Hey all. I just bought a Mid 2011 27 inch iMac from Gumtree here in Australia. I know I've well missed the replacement date for the video card change over by Apple. Can someone please tell me, did Apple simply replace the cards in these iMacs with the exact same video cards? Obviously with newly manufactured ones? Or did they change to something slightly different? I don't won't to muck around with flashing ROM’s to a different card or try a temporary bake fix. Cheers.