I had to check, because I wasn't aware there is such a time gap between the two. I seem to remember having P4s in many an office desktop while E3 xeons were pre

I had to check, because I wasn't aware there is such a time gap between the two. I seem to remember having P4s in many an office desktop while E3 xeons were present in new servers we installed. My Xeon cpu is Intel® Xeon® processor E3-1220Lv2 with 17W TDP wow! It was released in 2012 while last of P4s were sold new in 2008 (but first were released in 2002). So yes, you're right there is a decade between these two. In my mind (incorrectly) they were in the same "era" as many of my small business clients had lots of PCs with them at the time of Ivy Bridge Xeons.