celeron 300 help overclock

[freeul]

hallo
exscuse me for my little english
I have a mobo Pcchips M 726 Ali Alladin Pro II , 64mb ram 133, Celeron 300 , I change bus to 100 mhz, i break pin b21, i have change latency of ram, but nothing. the win98 start but after 5 second it stop. An help ?

[batboy]

Probably need better cooling. Look for a better CPU cooler and use a good thermal paste to mount the heatsink onto the CPU.

[Sir-Epix]

Cooling is not a problem with the old celerons. The problem is that it won't reach that bus speed at core voltage. This is what I think is the problem. You can reach 75MHz front side bus easy with that celeron...don't try 83 it just throws the system out of wack...and to get 100 you usually have to change the voltage. Hope this helps.

[The Doors]

Ciao, I agree with batboy and freeul,
can be an heat prob, never your chip must go over 45 degree C @full load (100% load), try using MotherBoardMonitor to check your system temps, that you can found at http://mbm.livewiredev.com/
or the Chip voltage (VCore) that must be rised to satisfy the bigger request of 'energy', but don't go over the 15% of the rated value.

I hope it helps you :)

[Monaco]

Cooling is not a problem with the old celerons.

Whoa! I have to disagree here, Celerons run very hot as their die is absolutely huge, and they take 2.0Vcore as well. My 300A would not do 450 on hot summer days until I upgraded the cooling. With good water cooling, it gets up to 525. But only as long as it stays cold!

freeul, if you can get a little bit into Windows, there is still hope! If you are able to increase your core voltage on that board, give it a try. Also, maybe raise the I/O voltage a tiny bit if possible. For better cooling, I used the stock 300 heatsink with 2 hi-speed 60mm fans tied onto it- worked like a charm!:D

Like Doors said, 45C or so is a good temperature to try to stay under. Mine does 450mhz at 50C or less, and 525mhz at 30C or less.

Good luck!

[batboy]

Yes, you can have heat problems with those old Celerons, but they will take a little more heat than the newer coppermines. I was in a hurry this morning when I first answered this post and forgot to mention the possiblity of increasing voltage a little for stability. I would at least remove the heatsink and reinstall using a good thermal paste. Then you might bump the core voltage up to 2.1 and see what happens. I would not go higher than 2.2v though. I used to have one of those old 300a Celerons that I ran at 464 MHz for about a year. Awesome CPU in their day. About 90% or more of them will run at 100 FSB. I have a couple buddies that could overclock 504 MHz with their 300 Celerons.

[Sir-Epix]

Originally posted by batboy
Yes, you can have heat problems with those old Celerons, but they will take a little more heat than the newer coppermines. I was in a hurry this morning when I first answered this post and forgot to mention the possiblity of increasing voltage a little for stability. I would at least remove the heatsink and reinstall using a good thermal paste. Then you might bump the core voltage up to 2.1 and see what happens. I would not go higher than 2.2v though. I used to have one of those old 300a Celerons that I ran at 464 MHz for about a year. Awesome CPU in their day. About 90% or more of them will run at 100 FSB. I have a couple buddies that could overclock 504 MHz with their 300 Celerons.

I never have a problem with heat. I used standard hsf on my celeron with no prob. It was the voltage that was the problem for me.

[RPM_Computing]

Hello, just signed up!

I had a Celeron 300a and heat was not the issue for my chip, even during the summer months. I had to bump the voltage a bit to get to 450mhz (4.5 x 100). 2.3 v should be the maximum anyone should attemp with their celeron otherwise you may burn the chip out. On the other hand heat may be the variant with your chip, so don't be afraid to experiment.

Good luck!

[LutaWicasa]

Welcome to OCers.com RPM_Computing :D

Basically, all of ya'll are right. With the old Cellies heat wasn't nearly as much of a prob as with the newer chips.....But......the cooler you can keep'er, the better off yer gonna be.
I have an old 300a @ 504 in my sons rig. With the hs(can't remember brand right now) w dual 5K fans, even in summer never exceeds 58c load. When I had some nothing B.S. hs with very low cfm fans it could become unstable in hot weather(would max at 69c)
I think the design of these old cores and their ability to disipate heat is why Intel went back to using the heatspreader.

Almost forgot......this is at 2.2v