WHAT'S THE DIFFERENCE BETWEEN CORE I3, CORE I5, CORE I7...??

WHAT'S THE DIFFERENCE BETWEEN CORE I3, CORE I5, CORE I7...?? 
.
¤ Core i3:
* Entry level processor.
* 2-4 Cores
* 4 Threads
* Hyper-Threading (efficient use of processor resources) 
* 3-4 MB Catche
* 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 processor resources)
* 3-8 MB Catche
* 32-45 nm Silicon (less heat and energy).
.
intel core i7 300x176 Difference Between Core i3, Core i5, Core i7 
.
¤ Core i7:
* High end processor.
* 4 Cores
* 8 Threads
* Turbo Mode (turn off core if not used) 
* Hyper-Threading (efficient use of processor resources)
* 4-8 MB Catche
* 32-45 nm Silicon (less heat and energy) .

credit-- Article World