P1 overclocking... WTF?

[Morpheus]

OK.. I am trying to overclock some P1-166s and when I increase the FSB, I still get 166MHz... WTF? I have several mobos and all go to 200 or 233 at least... I AM jumpering right too...

Seems like this should be straight foreward, but its not working...

These are MMX chips... Now, I can throw a p100 in and get it to POST up & down in speeds, but not the 166s... I am stumped...

Anybody?

Kris

[M@€$†®Ö™]

I am not going to leave this thread unposted :) I do not recall a p166 mmz or such being overclocked. If someone knows how. I wanna know with you Morpheus.. I will ask some peeps at the shop on Monday if this thread goes unanswered to try and help.

Maestro

[Shadow ÒÓ]

I played with one recently and had the same re****s. It seems the bios will not report the correct number, but if you run sandra or CPU ID you'll get the correct settings.

[Allan Nielsen]

Two weeks ago I OC'ed my old P166MMX to 200 MHz! Just changed some dipswitches, and it worked fine. It was unstable because of lousy cooling, but the bios reported 200MHz fine.

Have you tried flashing the bios, or isn't it worth it?

[Jon]

I have a P133 that does the exact same thing. It has jumpers for 75MHz FSB but it doesn't change anything when switched.

Weird stuff from the grand daddies.

[William]

see how things get weird when they get old, kinda like us seniors. But I agree that is really really weird.

[Morpheus]

What Shadow writes makes a lot of sense... I will have to give CPU ID a shot... course that means I have to actually build the system too... LOL

Funny... I have an old socket 5 board that DOES show changes in processor speed... too bad It can't do 200MHz or MMX...

Thanks for the help...

Kris

[FragBait]

Morpheus, why not use a Powerleap adapter? I have one I'm not using right now. You can put a P233mmx in it. I had one running at 292. It has it's own voltage regulator, and makes split-plane voltage. I have the bolt-on heatsink also. $20? E-mail if you're interested.

[deez]

The p166 is not multiplier locked...dont think the MMX is either, but i got my p166 running at 180 or something like that....posted at 200 by increasing multiplier (no FSB adjustments on my board)....but all i had was a heatsink...no fan...no case fan

[markedmundb]

Unless you've got a SS7 board (AMD K6-2 compatible) then you're at the top of the FSB tree, and even if you have, there may be code in the BIOS might stop the Intel chips from having too much FSB.

Try adjusting the multiplier.

AFAIK Intel only started multi-locking CPUs with the advent of the pII

[GuNRocK]

I have a Original Pentium 166 as far as i know there UNLOCKED so move up the multiplier i did that on mine and i fried my mobo it was some cheep azz inport it wasnt very stable at spec speeds anyway........ most if not all pentiums are 233mhz but they dont run stable at that speed they increas voltage a little if still not stable intel would name it a 200mhz and if that dnot work increase voltage still no they will go down one more level to 166mhz ... but since we all here are good overclockers and want to take a chance with moving up teh voltage alot more then intel did u can easily get the next level up with a voltage increase via the multiplier. good luck :)

[eobard]

My K6II board is all over the place when posting the speed when I overclock it. @450 it reports 450, @500 it reports 506, @ 522.5 it reports 531, @550 it reports 531, @ 600 it reports 512!!!! Test the speed using one of the many cpu checking utilities that are floating around and if it shows right just ignore the intial boot post screen.

[JigPu]

So basically, you are telling me that if I want to upgrade my P90, don't get a P166?? I wouldn't anyway. I'd go straight for maxing out my computer with a P233 /w MMX, or a K6-2 (and the 3D Now! instructions) and underclock it to 300Mhz.

Underclocking.... On an overclocking board.... What's wrong here!?!
JigPu

[GuNRocK]

thats how most of the pentium chips were created on the SAME production Line and some worked as built but soem needed a bost in voltage or need to downclocked.....check out tomshardware.com thats where i saw it and i am guessing that happend with the pentuim 150 or below becuase i have noticed that there is a lot of pentium 75s out there... also there was alot of ppl remarking Pentium chips becuase they knew that they could bump the voltage and get a higher speed and sell it for more $$

[Bakkteria]

I don't know if this helps but my first overclock was p150 to 166. I do remember that every p150 would do 166, supporting the remarked idea. Might be all you can get out of it. These were non mmx chips cerca '95 I believe. Long time ago huh?

[alex]

There is an old processor overclocking table in the following link, don't mind the article ( a how-to-overclock one)

www.sysopt.com/howtooc.html (http://www.sysopt.com/howtooc.html)

[Shadow ÒÓ]

swore Pentiums came out with a P90, P100, P133, P166 and P200.....don't remember a P150. Then again...I don't remember how to spell my name usually.....

Shaadew ÒÓ

[Allan Nielsen]

I don't remember a P150 either... but you are forgetting the P60 and P75 there Shaadew! :)

[deez]

there was a P150 and i think a P180 also not that it really matters now

[eobard]

Don't forget the Pentium 66, and that stupid hybrid Pentium 63 that ran on a 486 board.

[Treker]

FragBait (Jul 30, 2001 10:15 p.m.):
Morpheus, why not use a Powerleap adapter? I have one I'm not using right now. You can put a P233mmx in it. I had one running at 292. It has it's own voltage regulator, and makes split-plane voltage. I have the bolt-on heatsink also. $20? E-mail if you're interested.

I have to agree, I put a prommx adapter with a amd 500chip in my old p233mmx computer.. ran smooth as .. silk.

-Trek

[Morpheus]

Shadow ÒÓ (Aug 01, 2001 04:59 a.m.):
swore Pentiums came out with a P90, P100, P133, P166 and P200.....don't remember a P150. Then again...I don't remember how to spell my name usually.....

Shaadew ÒÓ

The good ole P1, as most know it, came in the following MHz flavors: 75, 90, 100, 120, 133, 150, 166, 180, 200 & 166mmx, 200mmx & 233mmx...

Unless the Pacific Northwest is deviod of a resonable used equipment sample, it would seem that a socket 7 mobo (not "super") that supports the 233mmx is as rare as a P-180... that is, both are as rare as a hen's tooth.. :)

Kris

[Morpheus]

back to the question at hand...

So my BIOS does report speed changes in the P-166 chip... I can get everything from about 50Mhz to 166Mhz... (Ran CPUID on the system & it reported 167MHz... as did the Windoze system monitor :( )

I am beginning to suspect the x3 multiplier setting is not functioning on the mobo (as the 180 & 200 settings also yield 166, or x2.5).... I have used a different jumper too...

So if that is the case... multiplier not working... then dropping down to 60MHz bus should reduce the total MHz to 150... if not, then something else is to blame here... I have 2 more of these mobos to see if this is an isolated board problem or not...

Any other ideas out there?

BTW, an adapter would be great, BUT, I can't see spending $20 to get a $7 chip to work on a $5 mobo... :D

Kris

Hey, if i can get one to 200MHz, then I only have 15 more to go... :)

[markedmundb]

deez (Aug 01, 2001 09:51 p.m.):
there was a P150 and i think a P180 also not that it really matters now

Petium Classic varieties I know of:

P60, 66, 75, 90, 100,120, 133, 150, 166, 200.

I thought the 180's were P Pros (or could've possibly been mobile chips)...

[Boffin]

The p180 was a P Pro only, there was a p150 but it was a stopgap and was seen in things such a Packard Hell's. The problem you are having with the 166 is probably because you have a locked chip. Intel made a few of them and on the p133's if it had SY022 on it it was locked. the same applied to some other chips

[Sir-Epix]

Originally posted by markedmundb


Petium Classic varieties I know of:

P60, 66, 75, 90, 100,120, 133, 150, 166, 200.

I thought the 180's were P Pros (or could've possibly been mobile chips)...

Yes the P150's did come on the Packard Bell...hehhe...I just threw one out today. Anyways that their Pentium Chip was a piece of garbage. It ran slower than my Evergreen Technologys 133Mhz processor. I am not sure if it had anything to do with Packard Bell's other fabulous equipment though. As far as mobile Pentiums go...I don't recall a mobile 180 but I know there is a mobile 233MMX...cuz I am using it right now.

[Bakkteria]

You dudes are sharp. Yup the p150 was in Packard Hells. My first overclock was the p150 in a packard hell that now resides in my pop's house. I can think of few things I hate more than workin on that piece of crap.

[MiteyJoe]

Some P-133's and P-166's ARE multiplier locked. You used to be able to tell by serial number.. but i dont remember what those serial numbers were at this time.

At the time of manuf of those chips, Intel was disabling pin 21 on the die itself to keep OEMs from overclocking and reselling their chips as a value higher then what they were.. that translated to some of us getting chips that are un-clockable.

I have one.


-Joe-

[TUK101]

If i remember correctly, i remember reading somewhere that you have to have a the bios updated to a certain point on phoenix bios mobo's. so, if you have a phoenix bios, there could be your problem, cause i have the same chip, and it posts up to 200 fine.