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Pentium III 700E

A

andman

Junior Member
I'm trying to push my Pentium III 700E CPU above 120 mHz bus speed, and have only been successful reaching 124. However, at 124, several error messages ranging from corrupted files to invalid system disks come up while booting into Windows. Anything above 124, and the PC won't POST at all. I've heard P3's with CB0 stepping are better than P3's with CA2 stepping, but, even so, I've read articles of P3's hitting a GHz and beyond. Is CB0 THAT much more overclockable than CA2? If not, what could my problem be?
 
What voltage are you trying to do this at??? It does sound like its the limit of your cpu... and more than likely a cA0 will not do much more than that either... (Is that what you have a cA0???)


Maybe this will show you a difference...

P3 700e @1050mhz 1.65 (cB0 week 22 cpu)
CUSL2 1001.a bios
 
My cB0 will barely do 933 @ 1.85v, but with occasional crashes, I've dialed it back to 900Mhz, still at 1.85v, but now with no problems.

I guess luck of the draw has something to do with it.
 
If you are using a BX motherboard, the 124 FSB is one of the most difficult to use due to the AGP and PCI bus frequency.

<< at 124, several error messages ranging from corrupted files to invalid system disks >>

The quality of SDRAM and the latency setting may cause these type of error too.

<< Anything above 124, and the PC won't POST at all. >>

You may want to try a VIA or 815E motherboard.

The P3-700E cB0 is an excellent chip for oc, but the result is by no mean quarrantted. Mine hits 133 FSB at default vcore and can run stable at 1 GHz using 143 FSB at higher vcore. Both cases, it runs the Prime95 without crash.
 
My cBO P3750 sits at 900mhz @ 1.65v(temps are normally around 32-34c), but to hit 1ghz I have to bump it up to 1.9v(With temps about 44c at full load) But the cBO i had before this one died from my overclocking it. I couldn't get past 855mhz at 1.9v It ran for about a day and a half at 1.9v and *poof* it was gone. And if anyone out there has a 750 cCO stepping let me know, i would be willing to trade my cpu and some cash/trade for one. Also do the new cCO come in fcpga or secc2, or both?
 
The last 4 700E systems I built would only do 868MHz@1.70v, they were all cB0. One would do 933@1.75 with an occassional win reg error, so i backed it down to 868. I wouldn't advise going above 1.75v ever.

You never know with 700E's what they are gonna do, but based on my experience, 868MHz is normally the max to run reliablyat a reasonable voltage.
 
The FCPGA cB0 650 I have now is running at 1021MHz at 1.85V on a 157MHz bus. I also have a Slot1 650 cB0 that won't run at anything above 910MHz at 1.85V. I got super lucky with my FCPGA chip.
 
The majority of the clones we've built will do 868 fairly easily. In my experience only about 25% of the CB0s do 933.
 
Wow! You must have been involved in the computer industry a long time to still be refering to PCs as clones still. LOL
 
Wow! You must have been involved in the computer industry a long time to still be refering to PCs as clones still. LOL

Hehe, I'm still getting used to &quot;PC&quot; to mean an Intel/Microsoft box rather than a &quot;personal computer&quot; (i.e. microcomputer). The days when we used to sell 90K floppy drives for $350 are long gone...

But to get back on topic (and to address andman), that it is the cA2 stepping that is holding you back is a reasonable conclusion. Some CPUs can do it; others can't. Luck of the draw sometimes.
 
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