What's the difference between an Intel Celeron and an Intel Pentium processor [closed]

"Basically, The Pentium line is the mainstream performance chip, and it has many optimised routines built in that make certain tasks perform fast.

For a Celeron, they heavily cut costs and generally have less on board memory, and the result is a much cheaper chip that performs reasonably well (and generally at less power), but not as good as an equal ghz/mhz Pentium / Core 2 of the same generation.

You can't really compare different generation chips because after the Pentium 4 era, the mhz/ghz no longer really count as a comparison because there are so many other factors that determine speed (front side bus, on board memory, instruction sets e.t.c.)"