The latest, and the best gaming chip in the Pentium range yet. If you're running graphics intensive games and you want high framerates for a reasonable price, the Pentium 4 range is for you. The Pentium 4 range is also, to date, the only processors to support the cutting edge technology of RDRAM. Although the Pentium 4 chipset still advertises its clockspeed, unlike Athlon, don't be fooled, for the pure clockspeed doesn't tell the truth any longer. For the Pentium 4 range, you will find it to run slower most of the time, however the new Pentium 4-A and Pentium 4-B chipsets may match or supersede this speed. This is for the fact that the newer Pentium 4-As and 4-Bs come with an increase in on-board memory cache as well as a faster Front Side Bus (FSB). Recently, the 4-C range has been released, maintaining the same cache but upping the FSB, as well as introducting Hyperthreading Technology. Below is the new cache sizes and FSB speeds:

Speed         Chipset       L2 Cache       FSB            HT*
1.40 GHz      Pentium 4     256 K          333 MHz        No
1.50 GHz      Pentium 4     256 K          333 MHz        No
1.60 GHz      Pentium 4     256 K          400 MHz        No
1.70 GHz      Pentium 4     256 K          400 MHz        No
1.80 GHz      Pentium 4     256 K          400 MHz        No
1.90 GHz      Pentium 4     256 K          400 MHz        No
2.00 GHz      Pentium 4     256 K          400 MHz        No
2.00 GHz      Pentium 4-A   512 K          400 MHz        No
2.20 GHz      Pentium 4-A   512 K          400 MHz        No
2.26 GHz      Pentium 4-B   512 K          533 MHz        No
2.40 GHz      Pentium 4-A   512 K          400 MHz        No
2.40 GHz      Pentium 4-B   512 K          533 MHz        No
2.40 GHz      Pentium 4-C   512 K          800 MHz        Yes
2.53 GHz      Pentium 4-B   512 K          533 MHz        No
2.60 GHz      Pentium 4-C   512 K          800 MHz        Yes
2.66 GHz      Pentium 4-B   512 K          533 MHz        No
2.80 GHz      Pentium 4-B   512 K          533 MHz        No
2.80 GHz      Pentium 4-C   512 K          800 MHz        Yes
3.00 GHz      Pentium 4-C   512 K          800 MHz        Yes
3.06 GHz      Pentium 4-B   512 K          533 MHz        Yes
3.20 GHz      Pentium 4-C   512 K          800 MHz        Yes

* Hyperthreading Technology
Note: Processors are arranged in ascending order of speed, not in order they were developed.

Other Intel processors:
Celeron
Itanium 2
Itanium
IXP1200 Network
IXP220/225 Service-Specific Network
Pentium 4-M
Pentium III
Pentium III-M
Pentium III - Xeon
Pentium II
Pentium Pro
Pentium MMX
Pentium
StrongARM II
StrongARM
Xeon with 512K Level 2 Cache
Xeon MP
Xeon