higher fsb or multiplier?

[theMan]

ok, i havent seen a definite opinion about this, but does anyone know if it is better you use your highest possible fsb or highest multiplier? i have tried both. i didnt notice much, but i didnt look very hard. thanks.

 

[imported_Kensai]

It's relatively better to use a higher FSB than multi.

 

[Dough1397]

higher FSB

 

[CheesePoofs]

Doesn't matter, what matters is which one will allow you to use the ram frequency closest to your ram's limit.

 

[theMan]

does a ram divider reduce performance? if i am running my fsb at 280, and my ram can only go to 230, lets say, can i treat my latency settings like it is running at 230? is that just the same as fsb 230, ram 1:1?

 

[superkdogg]

Originally posted by: theman
does a ram divider reduce performance? if i am running my fsb at 280, and my ram can only go to 230, lets say, can i treat my latency settings like it is running at 230? is that just the same as fsb 230, ram 1:1?

If your ram is running 230 MHz, then yes. The ram doesn't know what speed the CPU is running or anything else-it just goes the speed you tell it to.

 

[theMan]

yeah, thats what i thought, but there are all these people that say if u cant run @ 1:1, you should get better ram. i dont know where that comes from. thanks a lot.

 

[3chordcharlie]

Originally posted by: theman
yeah, thats what i thought, but there are all these people that say if u cant run @ 1:1, you should get better ram. i dont know where that comes from. thanks a lot.

those people are coming from AXP or P4 systems, which do not like memory dividers (at least in terms of performance).

 

[Tweakin]

Higher fsb

 

[TStep]

On A64, I always aim for the highest clock speed first. Then manipulate the LDT, multi, and memory dividers to max out the memory (either lower speed/tight or higher speed/loose, determined after testing).

AXP - same as above, but leave the memory dividers at 1:1 and aim for the tightest timings.

P4 - no choice but to maximize the fsb to the cpus max, then select memory that suit your cpus max fsb either via 1:1 loose or 5:4 tight. That is for 865/875 dual channel setups obviously.

I will never sacrifice very much clockspeed for memory speed.

 

[perdomot]

What if the higher fsb leads to lower overall speed? I can run at either 9 X 270 or 8 X 290(2430 VS 2320) but which one would have better real world results?

 

[DfiDude]

290 X 8 would have better results. More bandwith i guess or something.

 

[AristoV300]

Overall speed is what you want.

 

[lycurgus]

I would go with the highest FSB that can still allow you to run synchronously with the RAM, then up the multiplier from there to max out the CPU clock speed.

 

[theMan]

well, what im saying is, if the memory speed is the same, and the cpu speed is the same, is there a differnce between a really high fsb and a maxed put multi? if everything is the same?