I have a mid 2007 imac 20" 7,1, and I'm looking to upgrade the cpu to the core 2 Extreme X7900 @ 2.8GHz, but this is a mobile processor, for a desktop? I know it's seemingly compatible, and that there was an issue before with it coming up as core 2 duo for people, but there are core 2 extreme desktop processors, and I'm slightly confused as to what is categorised as what. In other words, I just want to be certain/have confirmation that it's compatible. Thanks