Overclocking AMD Phenom II X4 955

shravankale

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Following is my configuration:

Processor : AMD Phenom 955 3.2 Ghz
RAM: Transcend 3 GB DDR3 1333 Mhz
CPU Cooler: Stock cooler with MX-2 applied

I want to overclock my processor to 3.4 Ghz but since i'm a noob at overclocking i'll need a step by step process. One thing is that my processor shows a temperature of 43celcius on idle and goes till 55 celcius on load. So i'm worried if the temp will go higher due to overclocking and i dont want to fry my CPU...plz help.....thanks in advance
 
Going from the stock 3.2 GHz. to 3.4GHz. is just a matter of changing one BIOS setting - (the CPU multiplier) up by 1 from 15 to 16 - so is a very easy thing to do and should not effect the temp by more than 1-2C.

What MOBO do you have as the BIOS on the MOBO will determine exactly what needs to be done and what the settings are called. but the process is mainly to enter the BIOS settings find the settings for the CPU multiplier and change it from auto to manual and set the multiple at x16 instead of the current x15 - save the change and let the system boot.
 

shravankale

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I have a gigabye GA-MA788GMT-UD2H
 

shravankale

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AWESOME !! thanks a lot....If possible could you put up the BIOS Pictures too....I'm voting this answer as the best since i cant vote on the other forum .. :D :D :D
 

shravankale

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Shouldn't the multiplier be 16x default since my processor is clocked at 3.2 Ghz, so 200 X 16 =3200 Mhz
I want to increase it to 200 X 17 =3400 Mhz
 

knilbeci

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shravankale hello! this is the link to the thread that i started and it shows how i overclocked my cpu. mine is a phenom ii x4 940, yours is higher than mine so i guess you can even have a higher cpu clock than 3.5 without adding voltage to the cpu. i got mine increased from 3.0ghz to 3.5 ghz without any cpu or northbridge voltage changes. i used the formula 250 x 14 and left the voltages on auto. it's the ram that i added voltage to. ok just kinda read through the post and i hope you overclock yours too without any problems. goodluck!

my thread -> http://www.tomshardware.com/forum/257098-29-which-profile

- knil
 

knilbeci

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also i think that 250 is the maximum cpu bus that is stable enough to use to get the highest ht link and northbridge frequency. just a tip, try not to go above 250 x 14.5 = 3625 mhz. 3.2 going to 3.625 (4points) may be the best bet for your oc without adding voltages.
 

knilbeci

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oh that's because cool n quiet is on you have to change it on windows 7 power options in the control panel, use the settings maximum power, do not use balanced or battery energy saver
 

knilbeci

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i made an spd table for my ram for easy reference, you may want to make yours too



in my thread you can see that in the bios i used the 400 setting but the voltage that i used was the maximum voltage that the ram can handle, spd wont tell you this, you have to go to the ram manufacturer website to know it
 

shravankale

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yeah now it shows 200 X 16 = 3200 Mhz

But the thing is my temperature has gone up from 43 to 50 Celsius at idle...i'm worried if mt temperature will go further up when i overclock.. will it ??
 

knilbeci

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it will go up a little bit, if so, then overclock conservatively. for now try 210 x 15 = 3150, it's not too bad since the northbridge will be overclocked a little bit giving you some performance. try it and tell me what happens, set the ram timings correctly and leave the voltages for cpu volt and nbvolt on auto
 

knilbeci

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or try 210 x 16 = 3360, when you're overclocking while you still have stock cpu fan, take off both side covers so atleast the hot air will go out easily
 

shravankale

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i was just looking here and there in my BIOS

1) i have enabled high performance setting

2)i could go to BIOS and set CPU host clock control to manual, which is is default auto

3)CPU clock frequency is 200 Mhz which i can't change

4)then i can go to cpu clock control ratio and change it from AUTO to any value from 5x to 20x+

5)Since i want to achieve 3400 Mhz how abt i change the clock ratio to 16.5x (assuming my default is 16x) and then later change it to 17x

6) I just found these options while lookin into my BIOS settings these steps, so i want to know if the above process will OVERCLOCK MY CPU to 3.4 Ghz from 3.2Ghz
 

knilbeci

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oh the motherboard doesn't allow you to change the cpu clock frequency? in the case yeah just go with the simple overclocking technique, 200 x 16.5 or 17, yep that will overclock it
 

knilbeci

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the cpu clock frequency in your bios, when you highlight it, there are no options that come out right? did you try to type in the numbers using the numpad? coz in my bios when i highlight it, it also doesnt show any drop down menu, the 200 is just highlighted but when you type numbers on the numpad it changes the value, try it might work then you can change the computations later if that worked, you can raise the HT link and NB frequency, if it works try 210 x 16.5 = 3465
 

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