Overclocking PIII 700

[RC_Monet]

I just got a PIII 700 cpu from yahoo auction here, hehe, it's SL3XX, a little bit old stepping. After around 4 hours burn in at 1.95v (that's the highest core voltage I can set with this CPU), I can push it to 133 FSB, but it seems every time I turn on the machine, I can't enter with 133 FSB straight away, I need to set it as 100FSB and let it warm up for a while (only a few minutes), and then restart it and I can boot up with 133 FSB.
Do I need a bit more burn in on it?
another question, I can even boot it up with 1.90v , but some times when I play some games, e.g. FIFA 2001, it will halt or quit, does it mean that I need to put it back at 1.95v? I have a little bit worry about the temp then, idle is 31C, but if on load ( run sandra burn in Multi-Media benchmark continuously ), I'm sure it will go up to 43C or more. is it okay? do I need to change a decent HSF, like FOP38 something like that?
I'm also thinking to push it higher later, but do anyone using CUSL2-C knows how to set the core voltage manually, I mean greater than 1.95v. I'm sure it could caz I ever had a CII on it and it will allow me to change from 1.70v to 2.0v.

Sorry about so many questions, I'm just starting.

BTW, how can I change my type from visitor to member? I just found it's a good forum, isn't it?

Thanks!

[Pinky]

Well, start by reading all you can on the homepage about OCing. Second, 43C is a fine load temp. In my setup I sometimes hit 48-49, but the celeries are more tolerant of heat...

Anyway, burn it in for a few days at 1.95V and 100FSB. Try it again, looks like the CPU is struggling with the 133 FSB.

[RC_Monet]

Here is a question about burn in, why need I do it with 100FSB@1.95v, won't it be better do it with 133FSB@1.95v??? cauz I just found the temp only goes up to 40c with full load. Thx.

[Pinky]

Good question, but when running at max load for that long you may cause different shadowing/ghosting effects with the memory or over-stress the CPU without first testing to ensure it will run stable at that speed in the first place. But running at default bus you eliminate the possibility of damaging the cpu with overclocking generated heat, and only have the voltage causing the resistance needed to open the channels (help me here fellow OC'ers with the correct lingo) within the chip itself, which is all burning in does (it's similar to revving/accelerating an engine on a cold morning to warm it up/get the gas flowing).

Better yet, like a new water hose -- apply a little pressure to straighten it out and detect any leaks before pushing full pressure and possibly causing a leak/tear to get bigger.

Enough Metaphor!! If you don't understand it, perhaps someone a bit more technical can give you the raw numbers and diagrams.

[RC_Monet]

seems I've got it... :) thanks a lot!

[Pinky]

RC_Monet (Jun 06, 2001 04:38 a.m.):
seems I've got it... :) thanks a lot!

Excellent, OC'ed the same chip and got the same results (even at the same 1.9v !!). Good job. In time, you may consider better cooling and bump it up a little more, who knows.