Pentium 3 and 4 are the two outdated lines of processors of Intel. These two are no longer in production. They have moved to core and core 2 processors. The most notable difference between a Pentium 3 and a Pentium 4 processor is the speed.
Pentium 3 is an older version of the processor when compared to Pentium 4, the clock speed for Pentium 3 ends at 1.4Ghz.it is FSB speeds is 100MHz to 133MHZ. The Pentium 3 has an architecture of P6 microarchitecture and also has a pipeline stage of 12(15 with load &store/retire).
Pentium 4 supersedes the Pentium 3 and has a clock speed of 800 -3000MHz. The pipeline stage of Pentium 4 is 20. It based on the new net burst microarchitecture. Its FSB speeds are 400MT/s to 1066 MT/s.
One of the main differences between Pentium 3 and Pentium 4 is the speed of these processors. It is obvious that Pentium 4 will have more speed. Pentium 3 will be able to produce a speed of up to 1.33 GHz. The Pentium 4 will have a faster speed at 3.46 GHz.
The cache size is also a bit different. Pentium 3 will have a cache size of up to 512 MB, but for the Pentium 4, this is the minimum, and it will be able to hold cache that is far higher than that.
Take note that both Pentium 3 and 4 are somewhat considered to be obsolete right now because there are a lot more processors that are available now that will be able to take the demands of people when it comes to the tasks that they have to do.
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