What is a PCI devider?

[IIB]

I've heard the term before - but never quite understoud it...
What is a PCI Devider? - what does it do? - why do you need it?

Thnx!


This post is best viewed with common sense enabled

 

[camieabz]

It is a setting in your BIOS which allows you to have your FSB at different speeds and allow the PCI devices to run at a constant. To explain:

FSB is usually 66MHz, 100MHz or 133MHz.
PCI bus needs to be 33MHz.

Therefore if the system is 100MHz the PCI divider will be set at 1/3.

Some motherboards don't have this option, because they're not designed for overclocking or different FSB speeds at least.

Some motherboards have several divider settings. 1/2 for 66MHz, 1/3 for 100MHz, and 1/4 for 133MHz.

While I'm on the subject, the AGP divider is the same idea. The AGP bus is supposed to run at 66MHz. Therefore dividers usually were 1/1 for 66MHz FSB systems and 2/3 for 100MHz FSB systems. Now they're avilable as 1/2 for 133MHz ones.

Hope this explains things.

<b><font color=blue>The Cisco Kid</font color=blue></b>

 

[Crashman]

Good show!

What's the frequency, Kenneth?

 

[camieabz]

Why thank you!

I must be improving... :redface:

<b><font color=blue>The Cisco Kid</font color=blue></b>

 

[Crashman]

Yes, I'll let you, AMD_Man, and Matisaro take my place when I retire!

What's the frequency, Kenneth?

 

[AMD_Man]

You're retiring? So soon? We're gonna miss ya!

AMD technology + Intel technology = Intel/AMD Pentathlon IV; the <b>ULTIMATE</b> PC processor

 

[Crashman]

I'm here to pass on my knowledge to the new generation, I would have left long ago had I not been needed.

What's the frequency, Kenneth?

 

[Matisaro]

::honored to be mentioned in crash's list of possible replacements::


To add to the subject, I believe that most modern motherboards derive agp speed by multiplying pci(33x2), not dividing fsb.(if I recall correctly)

"The Cash Left In My Pocket,The BEST Benchmark"
No Overclock+stock hsf=GOOD!

 

[camieabz]

::honored to be mentioned in crash's list of possible replacements::

Myself also!

A bit early for retirement? You must be loaded. Can I take over the wee refurbishment project of yours?

<b><font color=blue>The Cisco Kid</font color=blue></b>

 

[AMD_Man]

Yes, I'm honoured as well!

AMD technology + Intel technology = Intel/AMD Pentathlon IV; the <b>ULTIMATE</b> PC processor