Intel Xeon Six-Core E5-2640 2.5GHz 7.2GT/s 15MB LGA2011 Processor without Fan, Retail BX80621E52640 Clock Speed: 2.5 GHz Max Turbo Frequency: 3 GHz Intel QPI Speed:?7.2 GT/s Socket: LGA2011 Max Memory Bandwidth:?42.6 GB/s