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New to this. Overclocking Prescott 630 3Ghz

post #1 of 15
Thread Starter 
I just got a Intel P4 Prescott 630 3.0Ghz with HT and 800 fsb. I want to tweak it just a little. I'd like to get it to 3.2Ghz with 1000fsb. I'm trying to be safe as possible about this since I'm new to it. What all settings do I need to adjust and what do they have to be set at? Do I need to adjust the the Voltage any for doing that small of a OC?


ABIT NI8 SLI Series Motherboard
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Intel P4 Prescott 630 3.0Ghz w/ 800fsb and HT
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post #2 of 15
Hi Ratm1221,

Welcome to the forums.

If you look to the top of the web page you will see an area called CP (Character Profile). If you enter your profile and insert your system specifications then it will be easier and better for those who help to be able to take the hardware specifications into account.

For a small overclock you will not need to change the voltages. This board supports a 1066fsb so you are to be commended on your choice of processor and motherboard. This is because you should be able to just move your fsb from 200 to 266 and not make any other changes to your system to achieve an overclock of 1GHz.

Here's how it works. The processor you have was fabbed out for a 1066fsb. Rather than make two different fabs Intel took the 63x series and the EE series on the same fab for this processor. Thus your processor was spec'd for a 1066fsb. Intel just downgraded the fsb to 800 on your processor but it was created for the 1066 so the move does NOT take this processor out of it's spec abilities. Intel just "Governed" the bus speed.

With your motherboard, you can remove the "Govern" of the processor and raise your fsb to the spec. This is why you do not have to make any voltage changes but if you were to overclock from 200 - 265 then you would after ~230MHz very likely have to raise the voltages as this is an out of spec fsb raise.

Look for "External Clock" and set it to 266. If this does not work, then shut the system down for ~30s. Hold the insert key down and restart your system. Enter the BIOS and reset to 200MHz and post here the inability and you can be shown how to do an out of spec overclock.

However, I do not know what you are using for a CPU cooler and such a raise would do well with a good aftermarket cooler. As a matter of a fact, any Prescott would do well with an aftermarket cooler.



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post #3 of 15
Thread Starter 
Wow Ropey, Thanks

That was very insightful. Thanks for responding to my post. I think I get it, but there's one thing I either didn't understand or just miss-read.

"but if you were to overclock from 200 - 265 then you would after ~230MHz very likely have to raise the voltages "

Did you mean to put a higher range because you said to set to 266. Just want to make sure 266 is the magic number.

As far as a cooling system I'm only using the factory fan I got. Do you have a good suggestion for a new fan? Also I'm getting a 256MB 7900GT graphics card. What do you suggest for a Power Supply. With all the money I'm droping on a card I'm going to have to budget with a Power Supply. Right now I'm using the factory one that came with my case. It's only 350W. Is that enough? I was thinking of buying this case and just using the power supply it comes with.

"RAIDMAX Sagitta ATX-921WSP Silver/Red SECC Steel ATX Mid Tower Computer Case 450watt PRESCOTT/ SATA Ready Power Supply "
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post #4 of 15
Ratm1221,
What Ropey was referring to is that 266 is the FSB you want to eventually reach, but once you go past 233 FSB you "may" have to increase your vcore to make the system stable. It depends on each individual system, I'e had some where I didn't have to increase the vcore until after 266, others I've had to at ~220. You'll have to give it a try.

You will definately want to get a new heatsink and fan, the one Intel provides with the 600 series processors is woefully inadequate. For an inexepsnive option I suggest the Artic Cooling Freezer 7 Pro, or if you want to go all out the Thermaltake Big Typhoon. Both will be more than adequate.
Links:
Artic Cooling
http://www.newegg.com/Product/Produc...82E16835186134

Big Typhoon
http://www.newegg.com/Product/Produc...82E16835106061

As for power supplies, your current one will not be up to par for a 78/7900 series card. Most manufactures reccomend atleast 28 amps on the 12v rail for these cards.

Some reccomendations:
http://www.newegg.com/Product/Produc...82E16817104954

or

http://www.newegg.com/Product/Produc...82E16817104953


Those are two inexpensive, quality power supplies. Other will certain have their preferences but for budget constraints it's hard to look past Fortron.
    
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post #5 of 15
Thread Starter 
Thanks whodie!

I guess another thing I'm not clear on is what determines wheather you need to increase your core voltage or not. Will you get some kind of error if you need to raise the voltage more?
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post #6 of 15
As i'm relativley new to this as you are, my words are only as far as suggestions and not proven facts

Anyhow from what I understand you will need to relativley increase the Core Voltage along with the FSB, I mean, if you can get you'r FSB to 266 on the stock Vcore [which is impossible, I tried XD] then great! You've overclocked you'r PC By aLOT without increasing the incoming voltage to you'r CPU which means you won't have an heat increasment in you'r CPU [Upping Vcore meaning upping the CPU/Mboard Heat, but it depends by how much have you upped it]

Hope youg et it, I figured it out through pure logic and some readings... It sounds right to me, lol.
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post #7 of 15
Actually what I am saying is that the 266 is a "stock" setting for a 1066 processor. The 630 is fabbed on a 1066fsb process and is a 1066fsb capable processor so that keeps the system in spec and no additional raises of voltages should be necessary to maintain the 1066fsb.

However the move from 201 - 265 is NOT Intel spec and the motherboard must make out of spec alignments to allow for the raise. This allowance as you raise the fsb necessitates voltage raises and other tweaks that are not necessary for the 266 spec.

All you should have to do to test this is move your fsb from 200 to 266 and reboot. If you have no problems making it into Windows (and I think you will be fine) then you can restart the system at the 200fsb again and await better cooling.

Edit: This is only possible because you have a cherry picked (whether you knew it or not) processor and motherboard. The 630 3.0 @ 4.0 GHz makes the transition easily and the motherboard is one of only a few that makes this move easily. Yoad is in error as you are not taking the processor (in this case) out of spec. Since it is in spec there is no need for additional voltage raises. He is in error also to extend that because he tried it in one (1) instance that it can not be done. Your chances are very good.

Let me be clear. You do NOT want to move any increment from 200 - 265. You want to move from 200 to 266 with NO increments between these two integers.

@ Yoad - Logic is only as good as the information sources that the logic is predicated on, otherwise the logic will return faulty deriviative based assumptions.

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post #8 of 15
Thread Starter 
That makes sense. Am I fine with my factory heatsink and fan?
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post #9 of 15
Quote:
Originally Posted by ratm1221
That makes sense. Am I fine with my factory heatsink and fan?
For testing purposes, to ensure that this board and your processor will make the move. Once you have found this to be a workable solution you then would do well to set to default and look to a decent cooling solution.

I have done this same move on five systems already. Everyone made the move. I have installed the Zalman CNPS7700cu heatsink/fan assemblies which gave me a ~43C Idle and 55C Load which is more than acceptable for this processor. There are better coolers such as the Thermaltake Big Typhoon.

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post #10 of 15
Thread Starter 
You rock dude, thanks!
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