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Can certain motherboards unlock intel cpu multiplier

post #1 of 8
Thread Starter 
Hi all. Thanks for reading this thread. I am thinking of getting a new motherboard (socket 775) and I wanted to ask these few quesitons.

1. Are there certain types of motherboards that can unlock the cpu's multiplier? Mine is a Intel 630 3.0 with a locked multiplier of 15.

2. What are the top overclocking motherboards used for intel 775 today? (My budget is around 200usd)

Thanks !
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post #2 of 8
The new Lga 775 is has locked and I say that asus p5wd2 sweet are sweet overclocking boards
    
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post #3 of 8
Only engineering samples have unlocked multipliers and no board or software can unlock those that are not.
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post #4 of 8
Thread Starter 
Big thanks to all who replied. Case Closed
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post #5 of 8
Quote:
Only engineering samples have unlocked multipliers and no board or software can unlock those that are not.
Not enterily true.

1-The 3.6 and 3.8ghz can be unlocked also, I have a 660 that runs at 310x14 or 240x18. And so a 3.8ghz will do the same.

2-The multiplier could be changed for those 3.4ghz and below CPUs with a trick from EIST and by it I mean if there's an option in the (ASUS) MoBo which would let you choose "minimal" for EIST. I have the option in my 955X which can change the multi down to x14 by setting EIST to "minimal".

Here's my 650 doing 250x14 (3.50ghz) and I benched it at that speed and the score didn't change that much compared to the stock 200x17, but it could be set to with a x14 multi.
post #6 of 8
Any intel cpu that supports EIST has the multiplier unlocked for a small range of changes. If the motherboard allows you to change it is a completely different question.

All you have to do to prove this is start up rmclock and watch while it throttles. The multiplier will change dynamically when the cpu throttles.
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post #7 of 8
Quote:
Originally Posted by jph1589
Any intel cpu that supports EIST has the multiplier unlocked for a small range of changes. If the motherboard allows you to change it is a completely different question.
This is true. My Pentium D 805's multiplier can apparently be changed from the stock of 20x to a range from 14x to 20x. This is according to neoseeker BTW, I haven't verified this fact.

I haven't tried it , but I do know that I do have the option of changing the multiplier via AiBooster (ASUS utility that came with my P5LD2's driver CD). I could probably change that in the BIOS as well I suppose.

Changing the multiplier would also be available/unavailable depending on your mobo.
post #8 of 8
Thread Starter 
Thanks for the quick replies guys. I'll have to experiment and find out. I have a mate with a 3.8 on a P5WD2 and another mate on a 3.2 on a P5WD2 as well. Is there any chance that the 3.2 would support this mode? The 3.2 (640) has a multiplier of 15x. Thanks all!
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