What is the best way to distinguish Pentium machines? I would like to be able to tell whether a machine is a Pentium 1,2 or 3. At least for the P4 I can tell by just checking the Motherboard coz its Processor socket is smaller. I will appreciate very much if I could just obtain a checklist of things to check for on any system. Is it possible to tell what Pentium I have by checking the Processor speed because I used to think the speeds could be categorized in ranges for P1-P4? Thanks to all who will contribute.