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10.5 multiplier causes no-boot (10 and 11 work)


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Can anyone explain why the 10.5 CPU multiplyer prevents my machine from booting, while multipliers 10 and 11 work fine? I've tried this with multiple FSB's within the 230-260 range. Each time I try 10.5, I have to reset the bios by popping out the battery or using the jumper method (if I can reach it).

 

Any ideas?

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always refrain from using half multipliers

 

 

 

http://www.dfi-street.com/forum/showthread.php?t=20823

 

 

 

"CPU/FSB Frequency Ratio

This is your CPU multiplier.. This times your HTTFSB is how you get your CPU frequency..

 

**Important note**

On all a64 systems it is not recommended to use half multipliers ( i.e. 8.5,9.5,10.5) because this will put your ram on a ratio which means it will be running slower then you think and not the same as you have your HTTFSB set to no matter what..

 

A quote here from Wild shows what happens to your ram speed when using half multis…

Quote:"

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Thanks for the unbelievably quick response.

 

Ok, that solves that. So to get the frequencies I want, I'm going to have to turn up the FSB a lot. I've read the O/C guides and FAQ's, but I can't seem to find a "max reliable FSB" for the Expert. I know I'm going to have to find the true max FSB through experimentation, but I was wondering if you guys could give me a ballpark. (The MB chipset will be watercooled, if that helps any).

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Head over the overclocking database. It contains useful setup information, just use the search function and your golden.

 

 

http://www.dfi-street.com/forum/forumdisplay.php?f=28

 

 

Finding your max FSB shouldn't be TOO tough. Post your progress and i'm sure you'll get some useful information from the users here. Hopefully your charting your progress :)

 

 

I was tempted to just start 'around the ballpark' of comparable setups to mine, but in the end, w/ the varying degrees of OC ability in different cpu batches, i've found to get the PINPOINT sweet spot OC.. u'll want to do everything from scratch. =)

 

good luck. Let me know how it goes.

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