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fsb speed - why does it matter?



 
 
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  #1  
Old October 29th 04, 03:27 PM
James Hanley
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Default fsb speed - why does it matter?

it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.

I can see the greatness of ddr since the same speed processor can
read/write twice as much per cycle. (i assume that the cpu has to be
ddr to receive or write double)
  #2  
Old October 29th 04, 04:00 PM
Adam Webb
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it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.



you cant push the multiplier high because its locked on most modern CPU's

also higher FSB = higher bandwidth = higher performance.

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  #3  
Old October 29th 04, 04:12 PM
David Maynard
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James Hanley wrote:

it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.

I can see the greatness of ddr since the same speed processor can
read/write twice as much per cycle. (i assume that the cpu has to be
ddr to receive or write double)


How is it you can see the benefit to 'read/write twice as much per cycle'
yet not see any benefit to more of the cycles?

The CPU communicates to everything through the FSB, and that includes the
memory, so the speed of it directly affects how fast the processor can
communicate. And since the vast majority of that communication is fetching
instructions from memory, it affects how fast it can process them.

  #4  
Old October 29th 04, 06:13 PM
Glitch
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"James Hanley" wrote in message
m...
it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.


LOL and what about the locked multipliers on the majority of processors?



  #5  
Old October 30th 04, 12:49 AM
Richard Hopkins
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"James Hanley" wrote in message...
it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.


rofl. Don't forget to shut the door on your way out James. :-D
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  #6  
Old October 30th 04, 07:33 PM
James Hanley
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"Glitch" wrote in message ...
"James Hanley" wrote in message
m...
it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.


LOL and what about the locked multipliers on the majority of processors?


well, AMD can be unlocked. Maybe intel can. They are not really
'locked' they are 'locked' for people that don't know how to unlock
them.
Just as windows files are 'hidden', it's just a gimmick to make it
'harder'.

LOL

I fail to see the joke
  #7  
Old October 30th 04, 07:34 PM
James Hanley
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"Richard Hopkins" wrote in message ...
"James Hanley" wrote in message...
it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.


rofl. Don't forget to shut the door on your way out James. :-D
--


Richard Hopkins
Cardiff, Wales, United Kingdom
(replace .nospam with .com in reply address)

The UK's leading technology reseller www.dabs.com
Get the most out of your digital photos www.dabsxpose.com


do dabs pay you to post garbage?
  #8  
Old October 30th 04, 07:38 PM
James Hanley
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David Maynard wrote in message ...
James Hanley wrote:

it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.

I can see the greatness of ddr since the same speed processor can
read/write twice as much per cycle. (i assume that the cpu has to be
ddr to receive or write double)


How is it you can see the benefit to 'read/write twice as much per cycle'
yet not see any benefit to more of the cycles?

The CPU communicates to everything through the FSB, and that includes the
memory, so the speed of it directly affects how fast the processor can
communicate. And since the vast majority of that communication is fetching
instructions from memory, it affects how fast it can process them.


The FSB is not THE ONLY THING that affects the speed. The
Multiplier*FSB create the speed. The Processor multiplies the FSB,
and the RAM multiplies the FSB. I am saying that the multiplier can
be increased, so low FSB speed doesn't matter.
  #9  
Old October 30th 04, 07:39 PM
James Hanley
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David Maynard wrote in message ...
James Hanley wrote:

it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.

I can see the greatness of ddr since the same speed processor can
read/write twice as much per cycle. (i assume that the cpu has to be
ddr to receive or write double)


How is it you can see the benefit to 'read/write twice as much per cycle'
yet not see any benefit to more of the cycles?


Obviously I see the benefit of more cycles. What do you think I meant
when I said "push the multiplier really high". That increases the
cycles per second.
  #10  
Old October 30th 04, 07:42 PM
James Hanley
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"Adam Webb" wrote in message ...
it seems to me that nobody needs a high fsb. since they could just
push the multiplier really high.



you cant push the multiplier high because its locked on most modern CPU's


nobody on an overclocking forum should be saying
"oh no, the multiplier is locked, what am I going to do"
Just like no technician is going to say, oh no, the file is 'hidden'
what am I going to do

also higher FSB = higher bandwidth = higher performance.


yeah, if it's greater width. i'm talking about speed only though.
 




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