I am using a summer 2010 iMac (21.5 inch). I have found that the ATI Radeon HD 4670 is not enough for my gaming needs... I know that it will be nearly impossible to replace the internal gpu, that is built into the computer... My question is, how can I connect (externally) a video card to my computer such as these: http://www.nvidia.com/object/buy_now_results_ci.html?id=GFGTX560TI I will only be using this graphics card with bootcamp for windows 7, so I don't think that the mentioned graphics cards not being compatible with the mac os will be a problem. Can I connect the graphics card using a mini display port adapter? If so, which ones? If not, what can be used to connect the graphics card to the computer so that it can be used at full speed for gaming within bootcamp?