Older 32-bit CPUs process less data per cycle than newer 64-bit processors.
There are two major brands of CPUs that each have high-end 32-bit processors with distinct features. The fastest 32-bit processors from Intel are part of the Pentium 4 family, while the fastest processors available from AMD are part of the Athlon XP family of processors. These processors boast high processing speeds and large data caches; however, they are only single-core models and cannot surpass the speed of newer, multi-core processors.
Pentium 4 570
The 570 is a processor from the Pentium 4 family made by Intel. It has an operating frequency of 3.8 gigahertz and a maximum bus speed of 800 megahertz. This processor uses the LGA775 socket and was first introduced in November of 2004. It is based on the Prescott processing core and is available in several core steppings (revision numbers). This 32-bit processor has a 16 kilobyte L1 data cache and a 1 megabyte L2 data cache. It provides users with twelve processor instruction sets including MMX, SSE-1, -2 and -3 and Hyper Threading Technology, Thermal Monitor 2 and Execute Disable bit. Five sets of power-saving processor instruction sets are also included in the instructions for the Pentium 4 570. This processor operates at 1.2 to 1.425 volts and uses 115 watts of power.
Pentium 4 Extreme
The Intel JM80532PH0992M processor is the Extreme edition of the Pentium 4 family. It has an operating frequency of 3.4GHz and uses a 1066Mhz bus. It is compatible with socket LGA775 motherboards and comes in the FC-LGA4 processor package. It was introduced in November of 2004 and uses the Gallatin processor core. It has a total of 20KB of storage for its L1 data cache, a 512KB L2 data cache and a 2MB L3 data cache. Its operating voltage is between 1.525 and 1.6 volts and it uses 110.7 watts of power. It provides eight processor instruction sets including SSE, SSE-2, MMX and Hyper-Threading Technology. The power-saving instruction sets provided with the P4 Extreme includes: Stop Grant, Auto HALT, Sleep and System Management modes.
Sempron
The Sempron line of processors by AMD includes both 64- and 32-bit processors. The Sempron 3300+ SDA3300BABOX processor is the fastest 32-bit Sempron with an operating frequency of 2.0 GHz and an 800 MHz bus. It uses a 754-pin lidded organic processor package designed for use with socket 754 motherboards. It uses a single Palermo processor core and provides a 128 KB L1 data cache and a 128 KB L2 data cache. This processor supports five processor instruction sets including: MMX, SSE, SSE2, CoolnQuiet and 3DNow!. It also provides an integrated single-channel DDR memory controller and HyperTransport technology. Its operating voltage is rated at 1.4 volts and it uses 59 watts of power.
Athlon XP
The Athlon XP 3200+ has an operating frequency of 2.2 GHz and supports bus speeds of up to 400 MHz. The XP 3200+ is compatible with Socket A (also called Socket 462) motherboards and uses a 453-pin organic PGA processor package. It was first introduced in May of 2003 and uses the Model 10 Barton processing core. The XP 3200+ utilizes a 128 KB L1 data cache and a 512 KB L2 data cache with an integrated Floating Point Unit (FPU). This processor uses 60.4 watts of power during typical operating conditions with a maximum of 76.8 watts during heavy operation. This processor has a voltage rating of 1.65 volts and provides seven sets of processor instruction sets including: MMX, SSE, 3DNow! and four power-saving instruction sets.
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