DIFFERENCE BETWEEN CORE I3, CORE I5, CORE I7...

Main Difference : 

Intel

-> Core i3:
* Entry level processor.
* 2-4 Cores
* 4 Threads
* Hyper-Threading (efficient use
of processorresour ­
ces)
* 3-4 MB Cache
* 32 nm Silicon (less heat and
energy)
-> Core i5:
* Mid range processor.
* 2-4 Cores
* 4 Threads
* Turbo Mode (turn off core if not
used)
* Hyper-Threading (efficient use
of processorresour ­
ces)
* 3-8 MB Cache
* 32-45 nm Silicon (less heat and
energy)
-> Core i7:
* High end processor.
* 4 Cores
* 8 Threads
* Turbo Mode (turn off core if not
used)
* Hyper-Threading (efficient use
of processorresour ­
ces)
* 4-8 MB Cache
* 32-45 nm Silicon (less heat and
energy)