They are no longer manufactured.
The RAM of an Intel Pentium 4 processor was as high as 1GB or 2GB. The chips were made between 2000 and 2008 before being replaced by dual core chips.
The Pentium 166mhz is a old socket 7 a very early Pentium prossessor,The Pentium 4 is modern form factor,much faster and more prossessor cach than the old chips.
No Intel Pentium 4 processor was ever manufactured running at a clock speed of 500MHz. However, the previous product line, the Pentium III, had several variants running at that clock speed.
The first Pentium chips had a processing speed of 60-66 MHz
The first Pentium chips had a processing speed of 60-66 MHz
In the Pentium series of CPUs, only Level 1 (L1) cache was manufactured on the CPU die itself. L2 cache (if it was needed or desired) consisted of SRAM chips mounted immediately next to the CPU socket on the motherboard.
pentium 4 more faster
Pentium 4 sockets were sockets numbers Socket 423 for early Pentium 4's. Then socket 478 for Pentium 4, Pentium 4 Extreme Edition and Celeron and socket T (LGA 775) for Pentium 4, Pentium D dual core, Celeron D and Pentium Extreme Edition.
The 80386 Intel chip
As a whole, the Pentium 4 has a higher maximum performance than a Pentium III. The Pentium III performs the same as or better than Pentium 4 at the same clock speed, but the Pentium 4 has a higher max clock speed (which the Pentium 4 was designed for).
Pentium 4 with HT technology runs at the highest speed.