[citation][nom]ramicio[/nom]Where is a 3.5" form factor? The server world still hasn't made 2.5" mainstream because 2.5" drives are for laptops. A 2.5" drive in a 3.5" bay is just a waste of space.[/citation]
but take a thin little 2.5, add a cheap adapter, some even come with it, and not that they make much heat but they make some with heat sinks and fans to help air circulate in your case, win win