Before I start this thread, some of us PPC users are trying to get add Old Intel to the forums. Help us out at http://forums.macrumors.com/threads...users-post-in-here-powerpc-mac-forum.1839885/ . Now to the point of this topic, a few nights ago in a iMessage group chat. The idea of upgrading the logic board in my iMac 5,2 came up. There is a logicboard in the iMac 5,1 that has a Radeon x1600. If it isn't obvious, this would be a major upgrade to the weak GMA 950. The question is, can it be done? My logic may be off a bit, but if the Radeon x1600 was made before the GMA 950 then they probably just recycled the iMac's parts and just changed the x1600 to a 950 meaning all the mounting holes are the same. I'm hoping its the same case as the Macbooks. Thanks!