X31: higher FSB, lower multiplier

X2/X3/X4x series specific matters only
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roibm
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X31: higher FSB, lower multiplier

#1 Post by roibm » Thu Apr 14, 2005 4:32 am

don't know really can handle such "bizzare" requests, but has anyone tried upping the fsb while lowering the multiplier? the clock speed should remain the same but the system should run faster without impact on the battery.

a problem could be an unlocked PCI/AGP bus in which case you won't be able to get much of an improvement but you may get some corrupted hdd data. on the other hand, if it is locked... well, bring it on.

I'm still searching for a multiplier handling tool, on the FSB side there is one already.

so... anyone who tried this already?

LumberJack
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#2 Post by LumberJack » Fri Apr 15, 2005 6:55 am

Hey...

Overclocking a laptop.. not a good idea. First Intel has always had locked multipliers. There is not way to unlock with with software. you can increase the FSB, but this would increase heat generations exponentially, not good on a laptop... bascially in my oppinion OC on a laptop is not a "cool" idea (hehe no pun intended)

LJ
X31, X200...

roibm
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#3 Post by roibm » Fri Apr 15, 2005 8:44 am

I don't need to go for a higher multiplier, I need a lower one, and that has to be possible. OC is somehow the wrong statement here, i don't want a higher proc clock, I just want a higher FSB(you may argue this is a clock as well). Having the proc run @ the same speed but with a 33% higher FSB will clearly bring a nice perf boost(believe it or not).

And there is something better, an x31 w 1.5Gb RAM(phun intended)

LumberJack
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#4 Post by LumberJack » Fri Apr 15, 2005 5:43 pm

Yeah.. unfortunately Intel locks the multiplier... its done in "hardware" you can't hack it. On Althon XP's and durons you could short pins on the chip to unlock it but not with intel. can't go up or down.. sorry...

i guess you can always sell you comp on ebay and buy a 2Ghz X32 :)

1.5 gig! eyah I guess that may be better... but really overkill...

LJ
X31, X200...

beerak
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#5 Post by beerak » Fri Apr 15, 2005 6:10 pm

As LumberJack wrote it should increase heat. Intel is always locked, so ... no lucky day today ...
Let's go'n'restart :-)

ThinkPad X40

roibm
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#6 Post by roibm » Mon Apr 18, 2005 8:00 am

LumberJack wrote:1.5 gig! eyah I guess that may be better... but really overkill...
Well, I do know about intel and locked multipliers but you seem not to understand that it is possible to change them. In my case it is possible to change it anywhere between 6 and 15(I have a 1.5ghz banias). True, it is not possible to go over 15(nor under 6), but I don't need to, I need 12 or 13 which is possible. Need evidence or what? Download CPU MSR and set your multiplier and voltage as you please.

As about overkill, no it is not in my case. I run oracle, apache, firebird and lots of java apps. As you see, overkill is relative.

EDIT: a great tool... you can define your own low level power management rules(multiplier and voltage). great for undervolting the cpu, you can squeeze some more out of your battery which ain't bad at all. of course you have to figure it out(first) and you have to experiment in order to find out the lowest voltage for your target cpu clock. have fun.

roibm
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Joined: Fri Feb 18, 2005 5:16 pm

#7 Post by roibm » Mon Apr 18, 2005 9:51 am

Ok guys, looks like my lowest voltage for 6x104 is 0.796V(down from 0.956V) and the lowest for 14x104 is 1.196V(down from 1.452V)

I can't recommend this rightmark clock tool enough. Would be interesting if others try it as well, in the end we all know the ULV banias are still banias and the marketing works the way it does, so why not get more(or less if you take the voltage as y) for nothing extra???

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