Overclocking a celeron 433?

[LooseCannon]

Hey.

I got a celeron 433mhz (66mhz x 6.5 multiplier), my bus speed can be changed to either 75mhz, or 83mhz. And my multiplier, although some ppl think is locked, can be changed up to 8.

My question is what are the best setting and how far could I overclock it without making it unstable? What should i change the bus speed to? and the multiplier? I'm hoping i could get up to something like 600mhz.

[Hexen]

Well i'm going to give this a shot,It really all depends on how your system is setup and if your proper cooling & tempatures can hold up to it,Although it's been well facted & stated the Intel family does not overheat alot but the colling IS a helping hand,I would extremely suggest like everyone else does,Try going small at first don't try to jump into the big MHZ so fast or you'll kiss that nice little celley goodbye,You shouldnt have any problems overclocking it 50-75MHZ as that may not run up to much heat,But if you go higher,You can always ask the nice people in the Cooling section for tips & tricks on cooling,Hope it all goes well!

[LooseCannon]

Well, a while ago I found out my fan doesn't work, i'll get a new one soon, but since my cpu doesn't overheat now and works without cooling I assume it'd work well overclocked with cooling.

[Hexen]

Well even though Intel's don't overheat alot,It's always best for cooling,Get a good HSF (heatsink & fan) Combo and slap it on there and a few good system fans,The OC that lil bugger,But remember everyone here started out in SMALL steps,So do the same then when you find the point where it is not stable drop it down to where it was most stable and a good clock speed for your tastes,I'm sure you'll have a fun time doing this,I know I do :D ,Only problem is I gotta have a GFD :mad: lol goodluck!

[batboy]

It's true those first generation Celerons can handle more heat than the coppermines, but... anytime you're overclocking, you definitely need better cooling. All Celerons have locked multipliers except for a few special engineering samples that the general public are not allowed to have.

Once you have your cooling fixed up, then raising the FSB to 75 should be very easy to get an overclock of 488 MHz. Running at 83 FSB will give you 540, which is getting close to the max for that CPU unless you have a very exception processor. Trouble is, 83 FSB is running the PCI and AGB bus quite a bit out of spec and might be a little unstable at times.

If by some miracle you actually do have an engineering sample (which I truly doubt) then with your setup, I'd go with 75 FSB and try 7X, then 7.5X, and maybe even try 8X to see if you can get any of those running stable. The higher you go, the more cooling you'll need and the more voltage you might need too. I don't recommend going more than 2.2v or at the very most, if you have exceptional cooling, no more than 2.3v.

[LooseCannon]

Well I don't know about special engineering samples but my multiplier isn't locked, in the bios i can change it from 2 up to 8.

Though I think it's possible that my cpu is a celeron 200 or something overclocked to 433, since I got it second hand.

[TripleH]

Its true about is cpu seeming to be overclocked. I had a 433 celeron and this bios gave me the same options, of course you will figure out soon my friend that even though it says you can change it in the bios it resets after exiting bios.

[TripleH]

i didnt mean overclock i meant it does seem as though you can change the multiplier which excited the heck out of me when i first bought my mobo plus cpu but you cant

[Bmxpunk86pl]

the reason that you can change your multiplier is if you buy a different cpu that requires that type of multiplier. all motherboards allow you to change the multiplier factor but if the multiplier factor doesnt match the cpu factor, you would be able to boot or your bios will just reset the multiplier to the way its supposed to be.

[Yodums]

Just because the multiplier is able to change the Bios doesn't mean you can change the actual CPU multiplier. I suggest you get a decent HSF and case fans..

Hope you have your case panel off..

Seems like the average overclocked for your chip is 569..

But for you to achive something like that you'll have to get better cooling.

[LooseCannon]

Thanks everyone, I suspected it could be something like that but I didn't even try changing the multiplier yet.
How stable will the cpu be if i'll change the bus speed to 83mhz?

[Bmxpunk86pl]

we dont know how stable it will be because, put it this way, no one in here has the same EXACT cpu as you do. So you'll have to figure out just how stable it will be. GOOD LUCK!!!

p.s. send back results!!

[batboy]

Running at 83 FSB there are several factors that might contribute to instability besides the CPU, like harddrives, PCI cards, and video card. Generally, 75 FSB is fairly stable and easy to achieve with minimal cooling and effort. However, 83 FSB is a gamble.

[LooseCannon]

I tried changing the bus speed to 75mhz, and the multiplier to 7, and it saved the settings but showed 488mhz when I rebooted. So I guess the multiplier is locked...

[Yodums]

Originally posted by LooseCannon
I tried changing the bus speed to 75mhz, and the multiplier to 7, and it saved the settings but showed 488mhz when I rebooted. So I guess the multiplier is locked...

Yes Intel motherboards are locked don't bother changing them.

[LooseCannon]

I don't have an intel motherboard...

[Elmo]

I have a Celeron 466 (66x7) running at 75FSB (525mhz). But when I try 83 it does something weird like finds errors in the registry whlie starting Windows then fixes them, then reboots. Sometimes it actually starts up, but blue-screens at the Network Login. I'd suggest you back up your files before trying 83.