Would like to overclock my processor. I know it makes them less stable, but I have a 233mhz and would need a new motherboard to upgrade to a faster chip, so I'll try this. I understand how this works (increase the voltage) but have never done it. Anybody care to help?

The first rule of o/cing is cooling. You must have a good (large) heatsink with a fan on the CPU.

In your case, the motherboard will have to support higher bus speeds. If you have a manual for the motherboard, it will tell you what it can do. Right now you are running at a multiplier of 3.5 and a bus speed of 66MHz (multiply 66 by 3.5 and you get 233). If your motherboard will let you select a 75MHz bus speed, you would go to 266 (actually 262.5). Most times a 233 will go to 266 without much trouble but you may have to boost the voltage a little to make it stable. This is where the cooling comes in (more voltage means more heat). It's also quite possible your CPU might not like running at 266. You can't change the multiplier with that CPU (or most Intel CPUs) so you're stuck with 3.5. There could also be other problems with your memory, or cards in the computer not liking the higher bus speed. The good thing is that you're not going to fry anything by trying a higher bus speed (if you put too much voltage in that's another story) so if it doesn't work, just reset your jumpers and save up for a new motherboard and CPU (and probably RAM and a case if your running typical components in a 233MHz computer).

I could go into a lot more detail but that should cover the basics. Overclocking is great, I'm running my 566 at 850 rock solid stable.

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Rick Sutter
Member #383
'67 Chevelle Super Sport
67SS.com (http://67SS.com)

RickS is correct here http://www.chevelles.com/forum/smile.gif. Also, If you notice frequent lockups after the overclock then it's too hot http://www.chevelles.com/forum/frown.gif

<BLOCKQUOTE>quote:</font><HR>Originally posted by BAD415:
... but I have a 233mhz ...<HR></BLOCKQUOTE>

What processor do you have exactly. If it's a PII/Celeron then MAYBE you will be able to overclock, depending on what motherboard/bios you have. If it's a Pentium (socket 7) CPU then...forget about it!



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Bill Burke
TC#613
ACES#3920
'67 El Camino-Finished? Never!
'80 Camaro RS
'77 Camaro LT
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Actually, pushing a Katmai core (original PII) to a higher bus speed is asking to burn up the cache chips. I've been able to clock several Pentium 233s to 266 but it's iffy though.

You're right, the CPU itself is probably more overclock friendly in a PII/Celeron but those cache chips are touchy.

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Rick Sutter
Member #383
'67 Chevelle Super Sport
67SS.com (http://67SS.com)

Hey Rick, gotta love the 566's@850 http://www.chevelles.com/forum/smile.gif My processor will run fine at 850 but my video card doesn't like the non-standard bus speed.

oc'ing is fun, but the best way it to build your system with it in mind, because certain cpu's oc well and some don't. IMHO a pII isn't even worth the effort, they don't overclock well at all.

If you want a fast system for cheap that you can overclock, a duron system is what you want.

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Chris Dagenais
Saskatchewan
'71 Malibu with a home built 454!
"Salad and vegetables are what food eat!"
My Page (http://www.ycworld.net)