Overclocking an Intel Rig

BigDom

BigDom

BigDom

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Hiya :)

I've just put together my first Intel Rig, used mainly for Folding, which need a bit of a tweak to make it even faster :P...

It's using the 2.6Ghz Dual core Processor on a AL8 Abit mobo with 2gig Geil Ram.

Cooling is using the Default Retail HSF for now but if that becomes a problem will be replaced.

Anyway I've never OC'd a P4 before so am looking for tips etc. on how to try to get the best out of this rig :).

Thanks.
 
Im not too sure about dual cores, im pritty sure they are the same as single cores. I have a 3.00 P4. I just keep bumping the FSB speed up. stock was on 200 and ve bumped it up to 215 and got a lil over 3.20. If you do this shouldnt have a problem. Whats the BIOS? make sure to watch your temps, and if it becomes unstable then you might have to run more volts though it. Also Ram timings may have to change.
 
BillytheImpaler said:
I don't really have anything constructive to say here but...

w00t! New dual core FAH rig! :D
Click to expand...
*grins* Maybe I should pit this rig against your two measly CPU's :P
 
BigDom said:
Hiya :)

I've just put together my first Intel Rig, used mainly for Folding, which need a bit of a tweak to make it even faster :P...

It's using the 2.6Ghz Dual core Processor on a AL8 Abit mobo with 2gig Geil Ram.

Cooling is using the Default Retail HSF for now but if that becomes a problem will be replaced.

Anyway I've never OC'd a P4 before so am looking for tips etc. on how to try to get the best out of this rig :).

Thanks.
Click to expand...
Method1:
1: Enable in the bios the lower CPU multiplier.
2: Adjust the FSB speed by raising the Ram until it is stable.
3: Your CPU speed will be FSB x Lower cpu divider (12x266=3.192Ghz).

Method2:

1: Up the FSB speed as far as it can go. I am still assuming you have DDR2-533 Ram so that is a 1066FSB as standard (intels are quad pumped so 266x4=1066).
2: Raise the FSB from the std 266Mhz to 300 to give a 1.2Ghz FSB x the default CPU divider of 14=4.2Ghz (300x14=4200) or with a lower cpu divider of 12x300=3.6Ghz.

You will need better than std HSF to overclock this CPU anyway.

Most recent Intel CPUs let you run with an unlocked lower CPU divider which gives you more flexibility with ocing as you can either run with the lower CPU divider + high FSB or std CPU divider + high FSB or even lower FSB with underclocked Ram + std CPU divider. All these methods give good ocing results you just have to benchmark your system to see what is best for it as different Ram + mobo combinations give different results.

Running with a 1:1 Ram divider always seems to give the best results overall but sometimes even underclocking Ram @ 3:4, 4:3, 5:4, 4:5, 2:1, 1:2 can be just as good.
 
Thank's Guys, from memory the CPU is running at 133fsbx20, does that mean that currently the RAM (GeIL 1GB PC5300 667MHz Value DDR2 Dual Channel) is running at an underclocked speed? Thus bumping up to say 166 without touching the divider will in most probability Succeed.. I am expecting to need a new HSF I hasten to add but wanted to see what I could get out of it without. The HSF by default does look pretty damned poor.
 
Big dom, would you mind listing the overclocking options on that board?

CPU Voltage
Memory voltage
Chipset voltage
FSB
Multiplyer


Cheers :)
 
Raikiri said:
Big dom, would you mind listing the overclocking options on that board?

CPU Voltage
Memory voltage
Chipset voltage
FSB
Multiplyer


Cheers :)
Click to expand...
all of the above.


CPU is Intel Pentium 4 805 Dual Core "LGA775 Smithfield" 2.6GHz
 
id go for an arctic cooling freezer 7 Pro in a heart beat. i dont have one but ive instealled on in my rbothers PC and ive never seen anything like it for 18 quid. seriously... im sure most people will aggree with me. thaye AWSOME coolers.
hes getting idle temps of 35C ( on a smithfield 830 3.0Ghz)
well worth it.
 
Multiplier is currently at 20 and go's down to at least 14 I believe.

FSB I have been told will go to 299.

The rest I'm not sure.
 
For reference currently Abit nGuru is showing temps of :-

CPU 35degC
System 27degC

That's folding on both cores so 100% on both.
 
Well I've done a little messing...

Pushing it up to 147 FSB with a .25 increase in volts. Seems stable with both cores folding and 38degC temp. Not sure how good that is.

I tried 150fsb with a .5 volt increase but no go.

So would like some tips to get it a little higher :)
 
BigDom said:
Well I've done a little messing...

Pushing it up to 147 FSB with a .25 increase in volts. Seems stable with both cores folding and 38degC temp. Not sure how good that is.

I tried 150fsb with a .5 volt increase but no go.

So would like some tips to get it a little higher :)
Click to expand...


Do you mean 0.025v and 0.05v?

Really it should be going higher than that, mine runs fine at 166fsb stock volts.

Make sure the ram is set to 1:1 and keep trying.
 
Raikiri said:
Do you mean 0.025v and 0.05v?

Really it should be going higher than that, mine runs fine at 166fsb stock volts.

Make sure the ram is set to 1:1 and keep trying.
Click to expand...
yeah I was expecting more :) - and yes your obviously right on the voltage :)...

I'll check the ram timing although it's speed appears right when I look at it (DDR500odd).
 
As its only a 533 FSB CPU then your best results would come from ensuring the Ram is running @ 1:1 but its not possible on this CPU so you can only raise the Ram as high as it can go from 133.

If you can get it to 166 then with a x20 divider (3.3Ghz) that would probably be as far as it would go without exotic non air cooling.

Your Ram is rated for a default 333FSB but unlikely this CPU will get anywhere near that.
 
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