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Help reaching 4ghz with 1055t.

post #1 of 10
Thread Starter 
My friend cant reach 4hz with his 1055T,
he is using 990FX UD5,
his N.B @ around 2700mhz H.T @2200 mhz.
He is using 1.150v n.b vid voltage,1.5v cpu voltage.
The pll voltage is untouched cuz both of us dont know whats the use of it.
He is using Zalman 9900nt.
Can you guys help him to reach 4ghz?
Cyrus
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Cyrus
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post #2 of 10
Thread Starter 
Currently he is running at 3.9ghz
Cyrus
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Cyrus
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post #3 of 10
What FSb and multi being used.
post #4 of 10
What richie_2010 said.

Secondly, what happens when you increase the multiplier? BSOD? Freeze? Crash? Unstable? What errors as-well if possible. Thanks!

We need the info to determine what the problem/limiting factor is.

Edit the PLL Just does this:

Summary:
1) better fsb
2) kill your cpu

More in depth:

PLL stands for phase locked loop and it is the primary circuit in the processor that sets the overall clock and not necessarily the processor .. PLLs are used anywhere that a device is clocked against a reference where the resulting clock is higher than the reference clock.

It works by taking an input waveform and generating a new waveform that locks it's phase to the incoming but with a multiple of the freqeuncy. This is why traditionally, multipliers have been whole numbers, because to lock the phase you want the generated wave form to start at the same point of the period and end at the same point of the period to remains stable.

Here is a square wave phase locked to a multiplier of 2, top row is input wave form, bottom is output wave form:

+ + + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - + + + + + + + + + + + + + + + + +
+ + + + + + + + - - - - - - - - - - + + + + + + + + - - - - - - + + + + + + + + + - - - - - - -

and so on, the frequency is 2x of the input, phase lock is bolded --- this is just a simple example.

Now you can achived the same lock if you allow the end phase to be exactly 180 degrees out of phase:

+ + + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - + + + + + + + + + + + + + + + + +
+ + + + + + + + + - - - - - - - - - - - - - - + + + + + + + + + - - - - - - - - - - - - - - -

So the output wave form is 1.5 of the input wave form so you get a 1/2 multiplier just to make things more complicated.

Yea basically just read the summary...tongue.gif
Edited by JassimH - 2/11/12 at 6:37am
    
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post #5 of 10
I'm not 100% but think your using 300x13 use 286x14 up the NB to 1.2 volt.
I think the voltage is high on CPU aswell.
What are the temps at load,

The ht should be close to stock aswell
post #6 of 10
try ht 2ghz and the northbridge at 2200-2400 1055t etc. dont like it to high
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post #7 of 10
Thread Starter 
FSB is around 260,cant remember the multiplier.
Temps are very good,even at 3.9ghz its 50c at full load.
Even if he tries anything above 3.9ghz he gets a fail oc warning
so should I increase the pll voltage? If yes by how much?
Cyrus
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Cyrus
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post #8 of 10
Thread Starter 
We want to keep the N.B as well as cpu speed as high as possible because we want to get the best result in benchmarking(we bench in HWbot for team ocf)
Cyrus
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Cyrus
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post #9 of 10
The max multi is 14 unless your using turbo which when ocin you don't want use. You need give us exact figures 300x14 makes 3900 260x14 makes 3640 260x15 makes 3900 using turbo
post #10 of 10
post all bios settings,pls biggrin.gif
tips:
a)put NB@ 1.2-1.3(helps stability)
b)Bump HT voltage a couple notches
c)lower RAM frequency
d)It may just not want to do it...i had a 955 black that just didn't like it :lachen.gif:
 
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Thuban Powah!
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