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Overclocking for first time cpu

post #1 of 13
Thread Starter 
Hello all!

I want to overclock my cpu,i have never overclocked cpu only videocard!

Yesterday i installed my antec h2o 620 cpu cooler (liquid cooled)

My temps went from 52degrees celcius to 31degrees celcius idle.I now want to overclock it to lets say 3.4ghz,can u guyz help me step by step????

I have following options ai overclock tuner (auto) need to change to manual right?

Cpu ratio setting

FSB strap to north bridge

Is it with those 3 that u guyz mainly overclock.

I have read on tweakers dutch forum that u need to overclock in steps of between 100mhz en 400mhz and now its stock 2.6ghz so best to overclock to 2.8ghz?????

What do i use best to see if my cpu is stable??? prime 95 ,LinX?????

Wich temps are actully to high?????

Thx in advance!!!
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post #2 of 13
Have a look HERE

If you get stuck ask on here
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post #3 of 13
Thread Starter 
i have read most of it max temp 85Celcius ,prime 95 is good so is occt and for temps everest home gonna download and install.

But what do i need to actully change cpu ratio setting and FSB strap to northbridge to 2.8ghz and then boot into windows look at temps and test prime 95 for long time.

Thank you for help ,apreciated!
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post #4 of 13
Too be honest, 3.4GHz is a easy goal to reach. You can do that fairly quickly without going in 100MHz increments. I would first recommend figuring out the stable voltage and settings for the FSB of your target goal 3.4GHz.

So what I recommend is setting the CPU's multi to x6 (lowest it will go) and bring the FSB to 425. This will bring your CPU up to 3.4GHz once you brig the default multi back up to x8 from x6. 425 FSB should be fairly easy for your P45 chipset board.

There is one thing to consider in all of this, and that is your ram. The ram is also tied to the FSB. So at the lowest mem divider of 2:1, you will have to run your ram at DDR2 850 (425 x 2). This is very possible with DDR2 800 ram. On that note, what is your OCZ ram rated for? And do you have a 2x2Gb kit or a 4x1Gb kit?

Back to the FSB. For a 425 FSB, you will need to mess with the GTL REF voltage and the Northbridge (NB) voltage (or called MCH in bios). Now it has been a while, but I believe the default NB voltage is 1.10v. I thi8nk you can push 425 FSB with 1.20v, and should not go any higher then 1.25v. As for the GTL REF voltage, it is done by a strength setting, so try setting it to: 0.65.

There is also a FSB termination voltage to change. I would set it to 1.22v - 1.24v. This actually has more to do with cleaning the signalling of the voltage then actually giving the northbridge any sort of power. So setting it too high (you should not need to go over 1.28v and never go over 1.35v) can cause instability as it can distort the signaling.


Once youve got the FSB and ram stable and figured out, OCing the CPU should be a breaze because up until now you've kept it out of the equation by dropping the multi to x6 (425 x 6 = 2.550GHz). Bring it back up to x8, give the vcore a bump, and test. if it is not stable, bring the vcore up in increments. You should not have to change any other voltages since you know the FSB and ram are stable. That is the reason to isolate the FSB (and inherantly the ram) first, then OC the CPU.
Here is a great rundown of your bios:
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/8783-asus-p5q-pro-p45-motherboard-review-6.html

And a page in the review about the OCing:
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/8783-asus-p5q-pro-p45-motherboard-review-9.html
Quote:
Nevertheless, a perfectly stable 473Mhz FSB at a mere 1.20V (measured via digital multi-meter) is nothing to scoff at, and hints at the solid overclocking potential that awaits someone with a more capable processor.



And on an end note, I do have a thread on the ASUS X38/X48 boards, which have similar bios settings. So if you want an explanation of some of the settings, see here:
http://www.overclock.net/intel-motherboards/269840-asus-rampage-formula-maximus-formula-p5e.html
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post #5 of 13
Thread Starter 
I have ocz platinium 2x 2gb ddr 2 800mhz i believe dual channel,isnt there a way to not increase voltage????Do i really need to bring ram to 850mhz????

Im happy with 3.2ghz to everything is better then 2.6ghz hahaha

Thanks for input!!

I have seen with cpu z that my multiplier is already x6 so i just need to change fsb to 467mhz and multiplier x6 then im on 2802mhz ???? then use prime 95???
Edited by A.T.I - 10/22/11 at 10:12am
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post #6 of 13
Thread Starter 
Help lol FSB to 467mhz en multiplier like it was x6????Do you guyz put intel speedstep off or better leave it on????
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post #7 of 13
Quote:
Originally Posted by A.T.I;15408052 
I have ocz platinium 2x 2gb ddr 2 800mhz i believe dual channel,isnt there a way to not increase voltage????Do i really need to bring ram to 850mhz????

Im happy with 3.2ghz to everything is better then 2.6ghz hahaha

Thanks for input!!

I have seen with cpu z that my multiplier is already x6 so i just need to change fsb to 467mhz and multiplier x6 then im on 2802mhz ???? then use prime 95???

The ram should have no problem running DDR2 850. It can do that at stock voltages approx 95% of the time.

As for the speedstep, disable C1E by going to the "Advanced" tab, then selecting the "CPU Configuration". From within there, you will see C1E.
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post #8 of 13
Thread Starter 
Ok thx but do you need to put speedstep on or is it better to put of when ur cpu is overclocked??Did u put that off???
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post #9 of 13
Quote:
Originally Posted by A.T.I;15410823 
Ok thx but do you need to put speedstep on or is it better to put of when ur cpu is overclocked??Did u put that off???

Almost everyone who overclocks their system will turn it off. You can check if your system is still stable with it on, and decide to leave it on at that point. Considering the OC you want will leave your CPU just below stock speeds with close to stock vcore, you might get away with it. But for now, just leave it off.
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post #10 of 13
Thread Starter 
Ok cool i have put it off!
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