Why do he old Pentium lll's and llll's have a higher ghz than the new core duo's???

Question

There are pentium llll's that run at 2.66 ghz that are older than the new core duos, yet the core duos have like 2 ghz and 2.4?

SO DOES THE DUAL CORE RUN FASTER OR SLOWER THAN THE PENTIUM 4, WHICH SHOULD I GET?

Answer 1

it has 2 cours at 2ghz each doubles it up since they run about 1.7x faster if that makes sense

so even tho ur pc might b a 2.66 ghz normal

a 2ghz core duo runs at about 3.7ghz since there are losses it meant 2 be 4ghz but because of loss brings it down to only 1.7x faster rather than 2x faster

Answer 2

Dual Core doesn't double processor speed. Period.

The reason for the slower clock speed is complicated, but breaks down into two simple things.

Heat.
Power consumption.

Dual core is the wave of the future, the laws of thermodynamics are catching up to processor manufacturing. You simply cannot pack more onto a chip with current tech.

2 ways to speed up a chip.

1. Pack more transistors on it. They have been doing this forever, and have reaced the end, if they make transistors any smaller, they melt, if they simply add more and make the processor bigger, it takes too long for signals to go from one side to the other side.

2. Increase the clock speed (Number of calculations per second) We can't do this anymore, either, more clock cycles equals greater charge time on the transistors. And higher wattage requirements. That equals heat. Heat=melted processors.

This leaves dual core as the only solution. They keep core speeds lower to reduce the amount of power, then split the code and feed half to each core.

In the future, the speed of a proc will not matter. Procs will have dozens, and eventually hundreds of cores. All running at modest speeds. But the amount of computational power they will have will be astounding

Answer 3

Modern CPUs have gotten far too complex for clock speed to be a sole measure of performance. Factors include
Amount of cache
Pipelining
Number of registers
number of arithmetic units
out of order execution
memory bus bandwidth
lots more

However, within a processor family, e.g. Core 2 duo,
a higher clock speed will give higher performance if all else is equal (cache, bus speed,etc).