Currently Being ModeratedAug 19, 2012 2:51 PM (in response to MRSoto)
For the most part iMacs were not designed to have their Video/GPU upgraded. Many have their video processors soldered in and others can only use the ones that were available as an option for that model. Sorry
Currently Being ModeratedAug 19, 2012 7:07 PM (in response to MRSoto)
Older 20, 24 and the 21.5 inch screen model iMacs have their GPU's soldered to the motherboard and cannot be upgraded or replaced.