overclocking a pentium3
 

how do you do it?and does this hurt the p3 in any way?mine is a 450mhz

Danger overclocking your processor can make it overheat. Now that that is out of the way go here... http://www.sharkyextreme.com/hardware/guides/p3_oc/


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Opposing Forces Dedicated Server "Yahoo" 216.99.203.117

There are a lot of factors that go into overclocking. Cooling is #1

1. It depends upon your motherboard. Does it have a CPUSoft menu that allows you to change the FSB(Front Side Bus)

2. If you change the the FSB to some odd number, it will change your AGP bus, and your PCI bus. (Not necessarily a good thing)

Here is my system and my overclocking results

Abit BX6 2.0
Celeron 400
128mb PC100
V3-3K AGP
SBLive Value
WD 8.4gb HDD

I applied thermal paste between the processor and the heatsink, then attached a dual fan. I also added a case fan. I also added a slot fan cooler and placed it next to the V3

The FSB default is 66mhz. Intel chips are multiplier locked. Which means you cannot change the clock multiplier. I turned off the speed lock control. This allows me to change the FSB.

The Cel400 has a multiplier of 6. So with the default of 66mhz, 6x66=396(Or a 400mhz processor)
The AGP bus was set to 1 to 1 ratio, so it ran at 66mhz

The PCI bus was set to a 1/2 divider, so it ran at 33mhz (Which is standard for the PCI bus)

I changed front speed bus to 83mhz

Processor - 6x83=498 (500mhz)
AGP - 1 to 1 = 83mhz
PCI - 1/2 = 41.5mhz

The system booted fine, the problem I ran into was with my PCI network interface card. For whatever reason, I could not get files to move across my LAN. I figured it was probably the odd settings, (PCI-41.5mhz). I brought it back down to 75mhz FSB. Which gave me a PCI bus speed of 37.5mhz. It seemed fine at that speed.

Ideally, I would have liked to set the FSB an 100mhz, which would give me the following specs.

CPU - 6x100=600mhz
AGP - 100 at 2/3 = 66mhz
PCI - 100 at 1/3 - 33mhz

The problem was that I could not get the system to even post at that speed.

Good Luck, and be careful

Also check out www.overclockers.com. I have a P3 450 that is overclocked on an Asus P3B-F mb. And stosh, what temp does your Celey run at?

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Peace Out

I think in the high thirties, celsius. I run into a couple of problems with temperature. First of all I have a cheap case, not very good for cooling. The ambient room temperature is pretty high(Hottest room in my house) I have two systems networked,(Twice as much heat generated in the room)
I also have the FPS2000, that subwoofer sure gives off heat.

On top of that, V3's and the Sblive both run pretty hot.

Also check www.anandtech.com ,they a really good bulliten board with an overclocking forum.

Hey Jethro.... I have the same board - Asus P3B-F. I'm actually running that board in two of my systems.

I have A Celeron socket370 366mhz OC to 550. It runs rock solid with proper cooling. Those are the easiest processors to overclock.

UB

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Damn... that's some mean rice!!!

i have dual 400 cels. on an abit bp6 running at 550 mhz...... celerons love to be overclocked.....

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Ryan

Give me a sniper rifle, and I'll take your head off your hands!
Give me a couple of enforcers, and i'll show you what it feels like to be a hunk of swiss cheese!
Give me a copy of Q3 Arena, and i'll just plain kill ya!

My P3 450@ 558 and 124mgz bus speed (I think thats what it is) Runs anywhere between 50 and 60 celsius. Kinda hot. Now I have a question, I have a fan mounted at the back of my case that is mounted as an intake fan and my CPU fan is blowing on the heatsink....Should I have the case fan mounted the other way around and the cpu fan sucking the hot air away from the heat sink? Or would it really make a difference? I really would like to get things runnin alittle cooler...Too hot. And any ideas on why I cant seem to boot any faster? Do I need to look into better cooling? Thanks for the help. And where can I get a slot fan to put next to my TNT2?

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Peace Out



[This message has been edited by Jethro (edited February 18, 2000).]

To boot faster you need to get a faster hard drive. You wouldn't believe how much faster a 7200rpm drive boots (Just ask Raptor http://boards.ioerror.com/smile.gif). As for the cooling fan in the back of your case, yeah, I would suggest turning it around so it blows the hot air OUT of the system (no use in keeping heat in). The CPU fan should be blowing air away from the CPU. As for the slot fan, look around online or at your local Radio Shack (I think I saw one there).

[This message has been edited by Cyborg27 (edited February 18, 2000).]

When I said How do I get it to boot faster I meant how do I get the comp to actually boot faster than 558mgz? It won't even get to the windows screen. What do I need to do different to get it to run faster? Adjust the CPU core voltage? And thanks for the advise on the fan thing Cyborg.

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Peace Out

Jethro:
Pitabred is the one to ask on the whole overclocking thing. He's into that kind of stuff.

Ok, thanks. Pita, think ya could help me out???

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Peace Out

If your really into this O/C'ing, check anand's site, especially the forums. There's a lot of overclockers who lurk there.

From my limited experience, heat is your problem. You definitely have to get that temperature down.

You may have to increase the voltage to get it to boot. Increase it in small increments, and remember, the higher the voltage, the higher the heat.

One way to check if heat is the problem. Open up the case and get a regular household fan and blow air into the system. That should bring your case temperature way down and you may be able to get the system to boot at that o/c'd speed.

Not all processors are overclockable. Celerons have a very high success rate. I'm not sure how well P3's will do. I think Sharkey's also has a pretty good overclocking section. I think they rate the different processors on their overclockablility.

Do you really want to take a chance and fry that p3. If I toast my Celeron, it wont cost me much to replace it.