Core i7-2600 3.40GHz 8MB L3 Shared Cache 1333MHz LGA1155 Box
By Intel

With 2nd generation Intel Core i7 processors, you get the following features built in: - Intel Turbo Boost Technology 2.0 dynamically increases the processor frequency as needed by taking advantage of thermal and power headroom when operating below specified limits. - Intel HT Technology allows each core of your processor to work on two tasks at the same time. ... 

Core i7-980X Extreme 3.33GHz 12MB L3 Shared Cache 1066MHz LGA1366 B
By Intel

With faster, intelligent, multi-core technology that applies processing power where it's needed most, new Intel Core i7 processors deliver an incredible breakthrough in PC performance. They are the best desktop processor family on the planet. ... 

Core i3-540 3.06GHz 4MB L3 Cache 1333MHz Socket LGA1156 Box
By Intel

Intel Hyper-Threading Technology - Intel Virtualization Technology - Intel Smart Cache - Execute Disable Bit - Intel 64 architecture - ...