CORE I3....CORE I5...CORE I7...??

Core i3:
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# Entry level processor.
# 2-4 Cores
# 4 Threads
# Hyper-Threading (efficient use of processor resources)
# 3-4 MB Cache
# 32 nm Silicon (less heat and energy)

Core i5:
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# 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 Cache
# 32-45 nm Silicon (less heat and energy)

Core i7:
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# 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 Cache
# 32-45 nm Silicon (less heat and energy)