Overclocking and multipliers

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Threepwood

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Am I correct in thinking that one can lower the multiplier of a locked multiplier cpu?

I am thinking about oc'ing an E2180 which is at 10x right?
Hoping for 3GHz, that means an FSB of 300, giving my ram a speed of 600?

So if I lower the multiplier to 8x and get an FSB of 375, that takes my ram to 750MHz.

That's assuming it works perfectly of course, and that I am right about lowering the multiplier being possible.
 
Threepwood said:
Am I correct in thinking that one can lower the multiplier of a locked multiplier cpu?
Click to expand...
Afaik most are locked both up and down...but the range selectable is wider on the downside, while the upside is locked to something pretty close to stock or at stock.
 
Why not just increase the FSB and lower the dram ratio to push the FSB further?

I increased my FSB to 405mhz from 333mhz and lowered my dram ratio to 1:1 so it runs at 810mhz and it is still stable using CL4, I can push my FSB further but I'm still using stock cooling so won't risk it yet.
 
Well with what I was saying I would be running the ram at 1:1 anyway.

Guess I will just have to find out for myself.
 
Oh ok, well I'm sure you can lower the multiplier I have speedstep enabled so my quad switches between 6 at idle and 7.5 when in use and I can choose a lower multiplier manually too.

Yeah, lower it and see if it works..
 
Threepwood said:
It does seem like you can do it, I'm almost positive from reading on other forums.

Also there are apparently results that show overclocking can be better when lowering the multiplier and uppng the FSB, I know there's a test on Tom's Hardware somewhere about that.

I think somewhere in this article:
http://www.tomshardware.co.uk/forum/240001-11-howto-overclock-quads-duals-guide
Click to expand...

I agree upping the FSB has a much better impact than increasing the multiplier, I've ran a few tests myself and having a higher FSB does improve things overall, trying to reduce ram latency and increase FSB bandwidth is were the real performance is at, my Mushkin ram can go up to 890mhz with timings of 4-4-4-12 but I'll keep it at 810mhz for now.
 
well... I agree with Dobee, having a faster fsb means you cpu will be able to upload and download stuff faster from the ram. So if you drop the multiplier to 8 and increased the FSB to 250, you will have the same clock, but I bet you it will work much much faster! and when you up the fsb, you also are increasing the ram clocks, so by reaching the 400mhz FSb then you're ram will (if it's ddr2 800 ram that is) will be running at full potential!

so whats say you drop the multiplier to 7 and run a fsb of 400mhz??? i'm sure that will be a nice improvement and you not pushing the cpu's clock to much!
 
Cool. Well, when I actually get the thing I will be doing a lot of experimenting.
 
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