fsb settings

[nicco eneidi]

whats the difference between the fsb setting of
140mhz (4:3:1)
140 (4:4:1)
?
i know that the first number 4 is the divisor for the pci devices but what do the second number changes mean?
The 4 4 1 seems to be more stable than the 4 3 1 though.
the cpu is a p3 600e @ 840

 

[JaY_III]

what is your motherboard and model number?

 

[DaveB]

The ratio you're talking about is the FSB:SDRAMCI ratio. At 4:4:1, the FSB equals the SDRAM frequency and the PCI ratio is 1/4.

At 4:3:1, the SDRAM divider is 3/4 if the FSB and the PCI ratio is 1/4 of the FSB. So at 4:3:1, your FSB is 140 MHz, your SDRAM is running at 105 MHz, and the PCI is at 35 MHz. Dunno how that could be less stable. It would be slower than running at 4:4:1 where the SDRAM runs at the FSB rate of 140 MHz.

 

[wild_andy_c]

I take it that this is a Via based motherboard.

These are the settings layed down to enhance or deter performance on your motherboard dependant upon the SDRAM you are fortunate enough to have. Ratioing level gives you full FSB SDRAM speed whilst ratioing 4:3:1 gives you SDRAM clocked at 3/4 FSB which is good if you only have PC100 and want to run an EB processor.

However - does your board have the option to switch the ratio and run the memory 33Mhz Faster than the FSB in order to get increased memory bandwidth from the running of a 100Mhz FSB chip (Or to get ehanced memory performance on a Celeron 2 at 100Mhz FSB).

 

[nicco eneidi]

its an abit se6
my ram is pc 133 .
but now im fine i was just wondering.