DIFFERENCE BETWEEN CORE I3,CORE I5, CORE I7

Core i3: Low range Processor

1) Entry level processor.
2) 2-4 Cores * 4 Threads
3) Hyper-Threading (efficient use of processor resources)
4) 3-4 MB Cache
5) 32 nm Silicon (less heat and energy)

 Core i5: Mid range processor.

1) 2-4 Cores
2) 4 Threads
3) Turbo Mode (turn off core if not used)
4) Hyper-Threading (efficient use of processor resources)
5) 3-8 MB Cache
6) 32-45 nm Silicon (less heat and energy)

 Core i7: High end processor.

1) 4 Cores
2) 8 Threads
3) Turbo Mode (turn off core if not used)
4) Hyper-Threading (efficient use of processor resources)
5) 4-8 MB Cache
6) 32-45 nm Silicon (less heat and energy)