Unlocking a Celery 633

[bfonnes]

Is there any way to unlock the multiplier on a Celeron 633Mhz... I want to run a higher bus speed. I am running 712/75/37.5 right now, but I get lock-ups. I wanna know if I can go 700/100/33 Mhz PCI bus with a 7x multiplier. I know my BIOS supports it, plus I can set the multiplier with Mobo jumpers. I think 100/700 would give me a nice speed boost. Of course, 133 is what I really want
Bfonnes

 

[zsouthboy]

Sorry, all Intel CPU's (starting with the Pentium II) are LOCKED. There is no way to unlock them or change the multiplier.

 

[rogue1979]

Try to sell off that 633 and invest in a Celeron 850MHz. It hits a 133MHz fsb for 1133MHz easily, my daughter is running one at 140MHz for 1190MHz at 1.90v. The thing only costs $45 shipped and works well on her $28 Via motherboard.

 

[obeseotron]

P2 333 was the last unlocked intel CPU I believe.

 

[Jhhnn]

I'd try making the jump up to 100fsb, for 950mhz. many bus-connected devices don't like any kind of elevated bus speed. by going to 100, everything can be brought back to standard- 33.3 for the pci, and 66.6 for the agp. Sometimes adding a tenth to the core voltage works wonders, too.... this all depends on the mobo's capabilities, and the individual chip, as well. pc100 memory is necessary, too, and a really good job of applying thermal paste between the processor core and hsf.

Changing the multiplier on the board accomplishes nothing- the cpu ignores it. Try it and see for yourself- the worst thing that can happen is that it won't boot....

 

[Tab]

I have a 850mhz celeron! Anyone know how I can maybe give it some extra juice? Or is this not possible?

 

[Doh!]

Tabb,

First you would need a motherboard that supports FSB adjustments. If that feature is not available either in bios or on the motherboard w/ jumpers, one other alternative is trying a software that can adjust the FSB. Using a third-party adjustment (i.e., CPUFSB), however, also requires that your motherboard's PLL type is supported for overclocking (FSB adjustment). If not, you're out of luck.

If any of the above options is available, then it's as simple as upping the FSB (and the vcore voltage if necessary). Having a FSB speed-compliant and quality RAM is necessary also. Do a search for 'celeron overclocking" on google & it will spew out a ton of info.

 

[bfonnes]

Originally posted by: bfonnes
Is there any way to unlock the multiplier on a Celeron 633Mhz... I want to run a higher bus speed. I am running 712/75/37.5 right now, but I get lock-ups. I wanna know if I can go 700/100/33 Mhz PCI bus with a 7x multiplier. I know my BIOS supports it, plus I can set the multiplier with Mobo jumpers. I think 100/700 would give me a nice speed boost. Of course, 133 is what I really want
Bfonnes

Actually, I was just hoping to unlock it, but I already knew I couldn't do it. But, I have been playing around with it since I made that post, and I have it running at 950 MHz/100/33 now. I didn't think it would be stable, but it is actually doing fairly well. I am running at 1.85V for the Vcore. Normal voltage is 1.65. I can't adjust memory voltages, unfortunately, since this is an older ASUS board ( nothing over 1Ghz for me ), but I would only add like .02-.05 anyway, because it is farily stable. I had already tried these things and I just read your suggestions, and they are right on the money.
Thanks everyone,
Bfonnes

 

[Jhhnn]

The memory is running at standard speed, so the voltage really shouldn't need to be tweaked.

And if the system is fairly stable, it may be possible to gain complete stability with better cpu cooling, hard to tell since you didn't say what you're using.....

 

[Blain]

I'd try and back down the core voltage a little. Unless 1.85 is as low as it will run stable at.