PerformanceThe Sandy Bridge CPU, Core i5-gjen 3 (2x2.6 GHz) is a business processor with AES functionality (fast encryption) and an improved dual channel DDR3 memory controller (max. 8 GB DDR3-1333MHz). The Turbo clock is 3.3 GHz and can go beyond that within the Turbo 2.0 concept framework. The Intel Core processors can increase the turbo clock with the "Dynamic Range @ Turbo Frequency Limits" once more, if the cooling doesn't exceed certain temperature limits.The HD Graphics 4000 graphics chip in the processor (650-1300 MHz) is solely responsible for the video output. The E6520 can optionally be bought with an Nvidia NVS 4200. The RAM configuration is standardly 8 GB. Six or eight gigabytes can also be selected. A Western Digital hard disk with a capacity of 250 hdd) in the lowest priced model (WD2500BEVT-75A23T0). Hdd 250GB Cel. : 0673434532 .