FSB, CPU external frequency and the frequency multiplier

Many individuals puzzled about the change between FSB, CPU consistency external
and the consistency multiplier and often puzzled with each change -
other. You can see the 3 elements described above everywhere, like in
package requirements of an Apple brand and mother board BIOS techniques. For more
details let us see the description below.


Is "buses" that?. Each component of your PC depends on its buses to
delivery of data between one another. The places where you
could find "the bus" is in the AGP and PCI slot on motherboard.
Slot-Slot requires "channel" to transfer data to various
Pheripheral (tools), these buses his channel.

Bandwidth is the biggest difference between the buses, the bandwidth is in the specified
the number of data can be transferred by a bus at a time
perputarannya speed (clock speed of.) For example, if a bus
PCI data transfer for 32-bit perkali, and its clockspeed-33 Mhz,
means the bandwidth of the PCI bus is 133 Mbps.

By comprehension the sentence above will help us to comprehend the picture
function of the FSB (frontside bus) is also generally known as the bus program.
FSB is accountable for switching information between brand with
Northbridge, and MHz (megahertz) is a consider of models for reliability. One
Hertz indicates one per second and 1 Mhz which represents one thousand periods per second.
So 533Mhz FSB can move information between CPU with Northbridge
533,000,000 periods per second.


FSB is just one of many buses in the system and part of
Motherboard device architecture. Example; P4C800 series motherboards using
Intel 875P chipset supports FSB of 800, 533 and 400 Mhz. Therefore
when selecting processor for P4C800, you can choose to use the processor FSB to 800 Mhz, 533 Mhz, 400 Mhz and even with this mainboard is fixed to 1600 MHz.

Although the CPU External Frequency figures different from the FSB, is technically a
same. CPU External Frequency also measured in MHz is another way
to measure the speed of data transfer among processor with the Northbridge.

Intel Processor Frequency External been registered (there his list), for example
at 100, 133 and 200 Mhz, but the question, how
Processor, the processor can support FSB 400, 533 and 800 Mhz?
That's because Intel's implementation of a technology multiplying the frequency
External CPU with 4, so this means 133 MHz External Frequency
basically indicates FSB 533 Mhz. Now you no more time will be baffled
with the external frequency in bios.


Now let's talk about what is known as the CPU Frequency Multiplier.
For example, for a 3:06 GHz processor with 533 MHz FSB, the ratios
is 23. Below is how the calculation is:
3060Mhz same 3.06GHz
533Mhz = 533Mhz divided by 4 = 133MHz, the
3060MHz/133MHz = 23 so the multiplier of the Pentium 4 3.06GHz is 23.

Other examples such as processor 3GHz with FSB 800, the ratio is 15,
The following calculation ways:
3GHz with 3000Mhz same
800Mhz = 800Mhz divided by 4 = 200MHz, so
3000MHz/200MHz = 15 so a multiplier of 3GHz Pentium 4 is 15.

Likewise 2.8GHz processor with FSB 400, the ratio is 28,
how to get it:
2800Mhz same 2.8GHz
400Mhz = 4 divided by 400Mhz = 100MHz, then
= 2800MHz/100MHz a multiplier of 28 Pentium 4 2.8GHz is 28.

Essentially, the multiplier or FSB frequency and CPU External Frequency
allow / allow you to determine the processor speed.