Sorry didn't make myself clearActually Stepping 2 is at least 2 steppings before a retail processor or even a QS it's identified as a L1/L2 CPU stepping. From what I understand a CPU-Z identified Stepping 4 is a retail/QS processor. Here's a picture where you can see a retail production CPU-Z E5 2680 V2:
https://d1ebmxcfh8bf9c.cloudfront.net/u30722/image_id_1029829.jpeg
This one is Es2.
Remarked CPUs usually are at least QS level and not ES(2)