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How to lower FSB multiplier x13.5 ?

Forum Overclocking : CPUs - How to lower FSB multiplier x13.5 ?

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rodney007   08-27-2009 at 10:35:27 AM

Hi guys,

i run a MX-SN SE plus mother board

5200+ amd dual core (at max oc 2.94GHZ) from 2.70ghz
i heard that by lowering my fsb multiplier i can run a higher CPU frequency?
i tried looking right through my bios but failed to see any adjustments..

any ideas appreciated.

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Bronze Overclocking badge jsc   08-27-2009 at 04:39:06 PM

No. FSB frequency X internal multiplier = core frequency. If your CPU cores limit you to 3.0 GHz (for example), it will not matter what combination you use. 3 GHz. will still be your limit.

What you are thinking of is the idea that you decrease the internal multiplier and increase the FSB frequency. The internal core frequency would be the same, but theoretically the setup with the higher FSB would be a little quicker because the higher FSB means that you are getting data into and out of the core more quickly.

In reality, there's little practical difference.

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bob_vicktor   09-02-2009 at 01:29:47 AM

jsc, you have a good point, but the AMDs operate a little differently. They use HyperTransport instead of a FSB (I haven't figured out the big difference). What I think he heard, but only remembered part of, was that by lowering the multiplier on the HT link he can up his base clock speed without setting his HT above recommended speed. The multiplier is kinda like how Intel 'quad-pumps' their FSB (1066 is really 266, etc.), but it is adjustable. If you already knew that, then my bad. ;)

For more info (where I go mine from actually) that goes into much better detail, go here:
http://forums.anandtech.com/messageview.aspx?catid=28&threadid=1497607

It is an excellent ocing guide that someone else in the forums pointed me to. Good luck!

------------------------------ There are only 10 types of people in the world:
Those who understand binary, and those who don't.

Which are you?
 Reply to bob_vicktor
rodney007   09-02-2009 at 01:59:10 AM

my MB didnt have any adjustment, my new one does,

solved!, thanks matey

Reply to rodney007
bob_vicktor   09-02-2009 at 02:07:15 AM

No prob! So have you had any luck yet? My friend has the 5000+, and I am curious what I might be able to get him too (if he lets me that is :D ).

------------------------------ There are only 10 types of people in the world:
Those who understand binary, and those who don't.

Which are you?
 Reply to bob_vicktor
rodney007   09-02-2009 at 05:56:22 AM

nah i upgraded the motherboard and cpu, 5200+ isnt good enough regardless of overclock.. not enough cache ... or cores :D

running phenom 720 x3 core, performance is almost double

Reply to rodney007
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