The Xeon E5640 2.66 GHz Quad Core Processor from Dell is designed to enhance the performance and the speed of your system. This processor features 5.86 GT/s bus speed with 32 nm manufacturing technology. An integrated 12 MB of L3 cache gives the processor core faster access to larger amounts of the data used most often. Additionally, the Virtualization Technology enables migration of more environments. It supports enhanced Speedstep technology that allows tradeoffs to be made between performance and power consumption. Packed with more features, the Xeon E5640 Processor is the ideal choice for virtually all of your data demanding or standard enterprise infrastructure applications. This product has been tested and validated on Dell systems. It is supported by Dell Technical Support when used with a Dell system.