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p5b-d sucks for FSB overclocks - Page 4

post #31 of 34
Did you read and understand the post on the NB and strap settings for the P5B? Latency for the NB is about to reset to the next strap setting at those speeds. For some reason, if I lower my multi 1x before I start upping my FSB...reach the speed I want...then set my multi back to my perferred setting, I have better luck achieving higher clocks. Doing this has also helped me avoid my PCI-e bandwidth from 'choking' down to 1x {another wide spread problem, reported by numerous users around the 400-450mhz range}.

*bump you PCI-e freq up to 105 or 110 if stable, this has helped me reach 482mhz FSB with this board....the highest I have been able to achieve yet with this cpu.
post #32 of 34
Thread Starter 
well I have tried 500mhz*8 with everything set to max and 1.525 I believe it was on the vcore to at least get a post. no go but then again at that point I'm not sure if that is cpu related as it is at 4.0Ghz or if that is related to the chipset. and being I am at stock cooling there is NO WAY this would work for long anyway.
I have read your guide but even that seems to leave me wondering as I have tried right around the range the strap should reset and it hasn't done much though I was at a different multiplier then stock.

is there a way to fool the chipset to thinking I am using the x9 multiplier yet still use the x6-7 multiplier?

how does fsb achieve better stability of the fsb?
compy jr
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compy jr
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post #33 of 34
I think you missed the point I was trying to highlight....
- 360fsb * 10x multi = 3.6ghz cpu and a NB speed of 360mhz

- 360fsb * 9x multi = 3.24ghz cpu and a NB speed of 400mhz
--------------------------------------------------------
- 400fsb * 8x multi = 3.20ghz cpu and a NB speed of 400mhz

-400fsb * 7x multi = 2.8ghz cpu and a NB speed of ~550mhz {SiSandra reads it as 547}


These are the clock speeds of a couple Oc's of mine, notice the NB speed jump. I bench'd better at the 360*9 settings, rather than 400*8......why I dunno. But I was merely suggesting you use the lower multi to 'ease' you way into a higher OC, as it should force the NB to run a lot higher. Once you find a good FSB....then raise your multi back up one notch.
post #34 of 34
Thread Starter 
well for now since I know the cooling is going to hold me back from doing much more I ended up just going to 9*355 with ram running at 1065mhz at 4-4-4-12 and so far I seem to be getting the best performance. the cpu is running about the same speed as I was before but now the ram is running quite a bit faster and still using the same timings so


now if I could only get my hands on a tuniq tower. the guy should be able to get then I just have to just wait for the delivery
compy jr
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compy jr
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vista ultimate x64/xp sp3 compaq 21" junk dell keyboard corsair tx850m 
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upgraded metal box You don't need a mouse Desk 
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