JrockMOD

hey guys when I overclock should I lower cpu clock ratio to 2x and than raise my fsb rather than leaving it at 8x and raise up my fsb? if so can someone explain why this is so? I'm stuck at 2.7 from a 2.1 and I really want to get more.

TFL Replica

There's no reason to be dropping your CPU multiplier that low. The only time you'd want to be doing that would be when the CPU clock has been maxed out in safe voltages and a higher RAM speed is desired.

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Ultrasonic2 (muffy)

Well i think this is a wives tale. As far as my own OCing has gone i've ALWAYS been better to have the multiplier as high as possible.

i think this wives comes from false reporting of the clock speed once you turn down the multiplier in some apps like Vista system information. if you turn down the multiplier and in crease the FSB some apps still thing the multiplier is high so you get massive OC's that aren't for real

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JrockMOD

so are you saying someone who lowers their multiplier to 2 and get a good ram they can oc higher than if someone would of left it at 8x and raised the fsb?

I really want to learn whats should I do next...because I was told I can get a higher cpu reading than 2.7..if so how? I haven't raised ne volts yet just the fsb at its max (meaning windows will run & pass stability test)

TFL Replica

No that's not what I'm saying. A multiplier as low as 2x would only be used to find the maximum possible FSB. An example is running 8x500 instead of 9x445 for 4GHz to get 1000MHz 1:1 on the RAM. The only reason the multiplier is reduced is to keep the CPU clock speed lower so the FSB can be raised.

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coolwhip

i also personally have had the best results with a higher multi. what he says when he says using a lower multi for higher fsb he means this:

if your running 9*350 your cpu will run at 2.7
and your memory will be running at 700mhz [its the fsb times two because its double data ram. doulbe=2]
so if you wanted your ram to run at 800 mhz, you would need a fsb of 400.
to get the fsb of 400 you would have to lower the multi so this way your cpu still runs at 2.7

and all the numbers i choose were just random, they dont mean anything except to provide you with an example

Ultrasonic2 (muffy)

so in short if were only talking about CPU OC then the highest multiplier is best.

If you want more ram OC which is also dependent on FSB then increasing the FSB and decreasing the multiplier so the CPU stays at the same speed but the ram is speed up is what you want to do

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justarealguy

Right, but some boards have FSB holes. Where between x and y it's not possible. To circumvent this, you can lower the multi and raise the FSB.

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JrockMOD

ok so leave the cpu clock ratio at its highest and raise the fsb than when its at its max (stable last point) raise up the volts and than raise the fsb again than it should leave me around 3.0 or higher? and if so will that be the end of me to overclock?

dralb

I also have had the best luck with highest multi. What I usually do is figure the highest vcore you can run and still have decent temps. then, using the highest multi and lowest RAM divider, raise the FSB and test for stability. Once you figure what the highest clocks are, you can then start to lower the vcore until you essentially have the highest stable clock at the lowest stable vcore.

After you get the CPU stable, you can then adjust the RAM divider accordingly. The only time to lower the multi would be (as stated above) to use different RAM dividers to get a higher RAM speed at the same CPU clock speed. Most of the time the gains are minimal, though.

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