


So for example you can have a Toshiba notebook and an Alienware/DELL notebook which both were designed by the same ODM (e.g. Now we come to the point - usually parts developed by a particular ODM (including EC firmware) follow their own internal design and thus work similar for several platforms. They design the core and add DELL-specific requirements. So even in case of DELL, this part can be designed by Quanta, Compal, etc. It's a proprietary piece of system and is usually developed by ODMs. The important thing is the program that this EC runs (firmware). Which EC chip is used on a particular system doesn't matter much in terms of fan control. I suppose the IT8518E is just one of several dozens of different Embedded Controllers (EC).

Let me start from beginning and since you seem to have technical background, I can go into details
