Difference Between Core i3, Core i5, Core i7

Intel has stopped selling Core 2 Duo. Core is the
new range of Intel processors. So letz knw wht
are they all..!!
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
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)

hope you find the info good...!!