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9550 oc

post #1 of 7
Thread Starter 
i think my vid core is like 1.25 with pi blacks 800mhz

i was hoping to hit @ least 4ghz HOPEFULLY

but i'm thinkin i am going to need better ram.

does anyone think so?

also whats the divider have to do with the FSB?
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post #2 of 7
The RAM divider, divides the FSB into a frequency for your ram.

For example: divider is set to 2:3
Then your FSB:RAM ratio is 2:3
With a FSB of 400, your RAM will then be running on 400/2*3=600 Mhz, or 1200 effectivly.

Most board have 2 other dividers: 1:1 and 5:6
Though 1:1 isn't nescessary for better performance (nog since older sockets),
it is still per definition the value dat will give you the most OC-room on your RAM for FSB increasement.

Q9550 has a MP of 8.5?
Then you would need a FSB of 470, and your ram will be on 940.
Wich is quite overclocked, so I don't know if they'll take it.
Your motherboard finds these kinds of FSB's a walk in the park on sunday morning, no worries there.
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post #3 of 7
No way to know if your ram will take it, they are all a little different. My previous ram would crap out at only 880Mhz (440FSB).
    
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post #4 of 7
You need RAM that does at least 940MHz..

The best devider is 1:1 for high FSB ocing..

OCing a C2Q past 450MHz FSB mark requires tuning CPU GTL voltages to make it Prime95 LARGE FFT stable (at least 6h)..

CHEERS..
     
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post #5 of 7
Some of the Pi Blacks OC'd fairly well, you should be able to get 900mhz out of them with the correct voltage and settings. 450mhz fsb will yield a 3.8ghz oc if your memory can handle it.

Id say give it a shot, worst thing that happens is that your memory cant handle it. In which case you can only get 3.4ghz.
post #6 of 7
Thread Starter 
yeah i'm thinkin about that also @ least hitting 400mhz 2:3 with a multiplier or 9

to hit 4ghz i would need 450mhz 2:3 with @ least 1.3+ V on a multiplier of 9

incriments about what .10 or should it be .010?

i know i can push @ least 900mhz with my ram
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post #7 of 7
Thread Starter 
what is fsb DQR i cant seem to put under 533 and max 3200. whats that mean?

also disabled speed step and c1 and left multiplier of 8.5

ratio is 3:2 which seems also the same as 2:3 or am i wrong?

right now i set it to 1200MHZ FSB QDR so it leaves my actual memory @ 800mem MHZ

dont undersand PLL or VTT

NB and SB are to be left alone i'm assuming
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