Graphics Card Upgrade for iMac
Right now my main computer is my iMac (2010 3.6 GHz i5) and it has an ATI Radeon HD 5670. My question is, has anybody tried to put a 2011 iMac's graphic card into a 2010 iMac? I was going to try and get an AMD Radeon 6770m with 512 Mb of vram from the 2011 iMac (21.5") to try and upgrade my current card with. If anybody has any info I would greatly appreciate it. I already have 16Gb of ram and a SSD so this is the last thing I wanted to do to it.
AFAIK The graphics card in your Intel iMac is part of the main logic board. Unfortunately therefore it is not possible to increase or change the graphics card.
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Personally I would contact ATI first and ask them about GDDR3 vs GDDR5 iMac graphic cards for those model before even messing around or wasting you time and money. Normally you can't just yank a graphics card just like machead3 stated.
If it where me .. I would backup you iMac HD and one of two things either purchase a used 2011 iMac w the GDDR5 or wait until Apple come out with a new 2012 model. If its true graphics power you want then Mac Pro (towers models) are the best way to go just because of the PCI Express 2.0 slots (16 lane and 4 lane) which what the graphic pros and gamers really need! SSD drives really help a lot also. Processors play a huge part in the graphics cards too .. they have to match the correct specs and data paths to the speeds used to drive each other because of heat issues. ;)
Best of luck ~Xtech