What is the main difference between Pentium 3 and Pentium 4 processor?

The difference is in P4 the new technology "Hyper Threading" has been implemented, the number of pins has been increased and cache memory has been increased. ~

Pentium III is an 80686. Pentium 4 is an 80786.

For Pentium 4, you have to find programs that are compiled for the Pentium 4 or else the performance will be low.

All Intel processors use the ISA instruction set developed back in the early 80s. First it was an 8-bit instruction set. Then there was the 16-bit. Next came the 32-bit instruction set, and the processors since the 80386 use it. Each processor model designates with the 80x86 notation. Each model increase in features and sometimes performance. Now the x86 computer industry is advancing towards the 64-bit instruction set.

8086 = 8-bit, 80186 = 8-bit, 80286 = 16-bit, 80386 = 32-bit, 80486 = 32-bit, 80586 = 32-bit = Pentium, Pentium MMX, K5, K6, K6-II, K6-III

80686 = 32-bit = Pentium Pro, Pentium II, Pentium III, Athlon, Athlon XP, Opteron*, Athlon FX-51*, Athlon FX-53*, Athlon 64*

80786 = 32-bit = Pentium 4

* = 32-bit/64-bit

If you have compiled a program for 686 architectures, only the processors equal to it or above it can execute it. If you have compiled a program with MMX/SSE/3DNOW instructions, processors that have it will be optimized and processors that do not have those instructions will not be optimized.

Answer

Speed.

First answer by Clay. Last edit by Andileson. Contributor trust: 0 [recommend contributor]. Question popularity: 120 [recommend question]

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