Full Details from Amazon.com : http://www.amazon.com/gp/product/B007SZ0ECE?tag=onigi-20

Intel Core i5-3450 Quad-Core Processor 3.1 GHz 6 MB Cache LGA 1155 - BX80637I53450

Model Intel Core i5 Processor i5-3450
Clock Speed 31 GHz
Max Turbo Frequency 35 GHz
Intel Smart Cache6 MB
Lithography22 nm
This Processor is a Quad Core Processor