Pentium4
Athlon
Intel
AMD
Common manufacturer
1.3 GHz to 3.8 GHz
500 MHz to 2.33 GHz
Clock Speed
400 MT/s to 1066 MT/s
100 MHz to 200 MHz
FSB speeds
8 KB to 128KB
64KB to 128KB
L1 Cache size
512 KB to 2 MB
512KB to 1MB
L2 Cache Size
533 MHz to 800 MHz
2000 MHz
Bus Speed
400MHz(RDR RAM)
200MHz (SDRAM),266 MHz (DDR RAM)
Front Side Bus(FSB)
$78 to$1,349
$48.81 to $364.1
price
Athlon advantages:
1-The Athlon has sixteen times more level-1 high-speed cache memory than the Intel Pentium4.
2-The Athlon has ten stages in its pipeline, meaning that each instruction goes through a minimum of ten stages of processing before the answer is available. The Pentium 4's pipeline is twice as long.
3- The Athlon has more functional units.
4- The Athlon has three instruction decoders, while the Pentium 4 has only one.
Pentium4 advantages:
1-it has Special "SSE2" instructions can hugely improve performance of certain types of software specifically designed to use these instructions.
2-it has Faster cache memory. While the Athlon has more of it, the small amount that the Pentium 4 has is far faster.
3- it has Higher clock speeds.
Pepole like Athlon because:
1-Athlons are priced lower, Fewer compatibility problems.
2- Some people are bothered by Intel's lack of honestly in marketing that their processor's speed is based solely on its clock speed.
Pepole like Pentium4 because:
1-The Pentium 4 is an Intel processor, and many people feel more comfortable with a known brand name.
2- There are unreliable parts such as motherboards made for both AMD Athlons and Intel Pentium 4s. These parts are generally thought to be more common for Athlons, so it is statistically safer to get a Pentium 4 system.
Introduction
Central processing unit The CPU (central processing unit) is the brains of the computer. Sometimes referred to simply as the central processor, but more commonly called processor, the CPU is where most calculations take place. This device obeys instructions from the program (software) and manipulates relevant data .It has ultimate control over all other components, such as the memory, hard drive and printer. . The CPU is the most important element of a computer system.
A CPU is a microchip, similar to those found in television. When you run a program - which is essentially just a list of thousands, even millions, of coded instructions – on your PC, the list of instructions is copied from the drive the program is loaded on (hard drive , CD-ROM / DVD drive), to the computer’s memory. Memory can be thought of as millions of numbered storage boxes, each one being known as a “ memory address “ and capable of holding one instruction. When the program starts, CPU looks at the first storage box, or address, and carries out the instruction. Once this is done it looks at the next memory address and so on. CPUs are rated by clock speed, “and typical figures these days range from 1.5 GHz to 3.6 GHz. One GHz equivalent to a billion pulses per second.
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