p2 oc'ing

[the-i-man]

i have a p2-233 @ 291 (83*3.5) i realy want to go higher (350) but i get no screen when i go further then 3.5 (probaly cuz multiplier is locked) (and i can't go higher then 83 cuz it's a 66fsb mobo. and now i have a few questions ...
1) the p2 is klamath core, shouldn't those be unlocked?
2) could there be any other reason that the puter won't boot if the multiplier is further then 3.5 (2,2.5,3,3.5 work fine)
3) is there ANY way to unlock the multiplier?
4) someone told me to get my voltage to 2.2, what's the advantage of raising the voltage?
5) is it true that the covering b20 trick doesn't work on LX mobo's ?

system: p2 klamath core 233
QDI legend V mobo (http://www.qdi.nl/english/mblege5.htm)
64 66mhz ram

[the-i-man]

cmon
help me out here
btw: i'm looking for guides on how to increase the core voltage on a p2

[Phil]

I remember when I fried my qdi legend 5, any way if you go over to www.overclockers.com.au they have an article on making your self a set of jumpers or dip-switches to change the voltage on slot 1 boards, can you use lower multiplyers?

[the-i-man]

Phil (Mar 15, 2001 05:49 p.m.):
can you use lower multiplyers?


yup, 3,2.5,2 work fine

[LutaWicasa]

Okay, on the OLD PII's the multiplier was upwardly locked. No, nothing you can do with the LX. The top end was 83 MHz FSB. Many times increasing voltage will help to run higher FSB but in your case obviously won't help. Even with a BX board I wouldn't bet on your going much beyond what ya got, but it would be fun to try :)

[Phil]

I keep forgetting about the limitaions of the lx chipset, the best you will get with that chip is what you have, one thing you could try is to cover up pin b21, on bx boards this allows a 100mhz fsb but also on my p2 233 disabled the multiplyer limit so I could then set 4 (wouldn't post higher than 4 becasue it was on a 100mhz fsb) but on an lx board it wouldn't allow the 100mhz fsb for obvious reasons but may still disable the multiplyer limit, make sure what you do is reversable (nail polish or something)

[DocClock aka MadClocker]

LutaWicassa is right that the old klamath cpu's were upward locked, meaning that you could not run higher than the clock multiplier, but you could set the multiplier to a lower setting, and run it on a 100mhz board,..like 3x100=300mhz or 2.5x140=350, or some combination that might work in your case, but if you got a LX board, then you're S.O.L., and need a new board to play with. but I would wait a while, maybe three months...intel and AMD will have different setups then, and might need a new platform to run it on.