Like the previous second and third generation Opterons, the second number refers to the processor generation. "1" refers to AMD K10-based units (Magny-Cours and Lisbon), "2" refers to the Bulldozer-based Interlagos, Valencia, and Zurich-based units, and "3" refers to the Piledriver-based Abu Dhabi, Seoul, and Delhi-based units.
Like the previous second and third generation Opterons, the second number refers, to the processor generation. "1" refers to AMD K10-based units (Magny-Cours an,d Lisbon) "2" refers to the Bulldozer-based Interlagos, Valencia, and Zurich-based units, and "3" refers to the Piledriver-based Abu Dhabi Seoul, and Delhi-based units.