Some games I have found when you set a non native resolution they look so ugly and blocky you can not play them. However I played Call of Duty:Modern Warefare 2 and at 1024x768 it looks like native resolution on my Macbook Pro 1400x900, no blocks or artifacts. It must have a little trick up its sleeve to achieve this. How many of you game at non native resolution and how do the games fare when you do. ps I assume because iMac screens are now huge resolutions and even a 17" Macbook Pro is too much resolution for its 330m to pump out, most people must be running at non native res.