Overclocking a Pentium II

[Fluid_Al]

Hey all! this is my first post here!

anyway, i was wondering how to overclock a Pentium II MMX 266 processor, it has a Chaintech ATX mobo, and it mentions supporting "68 (Turbo mode), 75/83MHz system clock for over-clocking possibility". I would like to know if it is *mabe* possible to get to a stable 300 MHz for my CPU.

BTW- i am new at this (if you didn't already realise that :D )

[donny_paycheck]

Originally posted by Fluid_Al
Hey all! this is my first post here!

anyway, i was wondering how to overclock a Pentium II MMX 266 processor, it has a Chaintech ATX mobo, and it mentions supporting "68 (Turbo mode), 75/83MHz system clock for over-clocking possibility". I would like to know if it is *mabe* possible to get to a stable 300 MHz for my CPU.

BTW- i am new at this (if you didn't already realise that :D )

Bus speed to 66, multiplier to 4.5x, ignore that turbo schiznit, it's a bunch of bs anyway....stock cooling is all you need and don't even worry about unlocking the multiplier cuz it isn't locked. Welcome and good luck! So begins the addiction...

[Pinky]

Originally posted by Fluid_Al
Hey all! this is my first post here!

anyway, i was wondering how to overclock a Pentium II MMX 266 processor, it has a Chaintech ATX mobo, and it mentions supporting "68 (Turbo mode), 75/83MHz system clock for over-clocking possibility". I would like to know if it is *mabe* possible to get to a stable 300 MHz for my CPU.

BTW- i am new at this (if you didn't already realise that :D )

Welcome! Now to business... :)

You'll want to check to see if the multiplier can be changed, if so, you could get some extra speed... 83mhz clock may be too high for some of your PCI cards... check your bios for a softmenu or other cpu settings... if there are none in your bios, scan your motherboard for jumpers or dip-switches and possibly a small diagram to tell you what the settings are for...

[jazztrumpet216]

WELCOME TO THE FORUMS! As Pinky said, check your motherboard for DIP switches or jumpers... usually ones named "FSB" (Front Side Bus, of course). I think the multiplier is locked on that chip, but I am not 100% sure of that. I believe everything after the first Pentium series is locked. 300Mhz should be easily attainable. With your 75Mhz bus, you'll get 338Mhz , with 83 (this may be too high for some of your PCI cards, also as Pinky mentioned) you'll get 374Mhz. If you can adjust your multiplier and keep your FSB as is, it will run at 300 exactly with that multipler at 5, 333 at 5.5, 366 at 6, etc. I don't think a motherboard of that generation would go much higher than that. Are you using the stock HSF, or have you put another one on there?

[Fluid_Al]

Originally posted by Pinky


Welcome! Now to business... :)

You'll want to check to see if the multiplier can be changed, if so, you could get some extra speed... 83mhz clock may be too high for some of your PCI cards... check your bios for a softmenu or other cpu settings... if there are none in your bios, scan your motherboard for jumpers or dip-switches and possibly a small diagram to tell you what the settings are for...

yah, the multiplier can be changed, but the only other thing i found in the manual was to enable or disable the CPU's built-in and secondary cache.
BTW- how do i change my bus speed?
i hope that is of some help.

[Fluid_Al]

eh he... i just had to read my manual a little bit more, and found out all i had to do was go to the SeePU & Chipset setup and modify it :rolleyes:

[donny_paycheck]

Yeah, easy as pie with a PII.

I don't think Intel locked multipliers until the PII-350s and above. Supposedly the 333 is the best for an oc cuz it's the 1st to use the newer (Klamath? It's been awhile) core and the last to not have a locked multiplier. I know this for a fact cuz I had a 333 and 350 and the 350 went to like 370-something from a fsb hike but the 333 went all the way to 450 and was stable!

[batboy]

Just to clarify the locked vs. unlocked multipliers. Many early P-II CPUs were unlocked, but most of the later ones were locked. I've seen some 233 and 266 CPUs that were locked and some that were unlocked. Depends on the manufactured date I think.

[Ragefreak16]

Originally posted by Fluid_Al

oops
eh he... i just had to read my manual a little bit more, and found out all i had to do was go to the SeePU & Chipset setup and modify it





in the bios screen? didnt see any FSB setting in my BIOS screen...:eh?:

[Yodums]

Check around the CPU for jumpers..

There should be 2 jumpers..
One for Multiplier and FSB..

Try upping the FSB to 75 and see what it does.. Its most likely your chip will be locked though..

Depending whehther it was one of the "new" or old P2..

[Ragefreak16]

what do these jumpers look like?and are they labeled FSB and Multiplier and how do you unlock it if it is locked.

how would i know if i am turning it up 75, and not less or more

[Yodums]

Originally posted by Ragefreak16
what do these jumpers look like?and are they labeled FSB and Multiplier and how do you unlock it if it is locked.

how would i know if i am turning it up 75, and not less or more

Check the manual.

It should give a layout of the board with all the functions of it, ie:

where the ram is, cable connectors etc.

After you find out where the manual should also include the different settings for the jumpers.

Basically jumpers look like 8 or so pins popping out 4pinx2rows
and there is a plastic thing which cover like 2 pins.. or so.

If you see on the hard drive you will see jumper as well.

If you don't have your motherboard manual you can most likely find it online probably.

[batboy]

If the CPU is locked, you cannot unlock it. Download and use a program called SiSoft Sandra and this will tell you what your system is running at (FSB, CPU clock speed, RAM speed, and lots of other cool info about your computer). Also, using the burn-in wizard of Sandra is a good way to test and see if your overclocking attempt is stable.

[Ragefreak16]

ok how do i adjust these little switches for faster performance?will i need xtra cooling?

[jazztrumpet216]

You may need extra cooling, check your BIOS (or Sandra) to see what your CPU temperature is. Generally anything over 45C needs better cooling, that's my rule of thumb.

We can't actually tell you what to do to change your settings because we do not have the same settings you do to change your speed. Unfortunately, you have to find out what these DIP switches do to find out how to change your multiplier/FSB settings. Check your motherboard manufactuer's web site http://www.chaintech.com.tw/ for more information on how to switch these settings (note: you will need to have your mobo model # handy). G'luck

[Ragefreak16]

thanks man you've been a real help :)

the motherboard as your avatar isnt yours is it?
and whats the best site for PC's you've found?

[jazztrumpet216]

Originally posted by Ragefreak16
thanks man you've been a real help :)

the motherboard as your avatar isnt yours is it?
and whats the best site for PC's you've found?

lol... actually it is. It was the motherboard out of a Compaq 200MMX system that was nothing but a pain. It was my dad's, but he gave it to me, and I had no idea what to do with it. My not-so-technologically savvy mom wants a computer for "web-surfing" (I haven't had the word 'surfing' used in relevance to the web in years), so my dad was able to procure a P166MMX from his job that they were gonna toss... I threw the processor from the Compaq in there and a few other decent components, and scrapped the rest. I just couldn't let the mobo get away with all the years of harassment it gave me, so I decided to give it a fitting end. hehehe... now I'm gonna RMA it to Compaq and say "Gee, I opened it up and it all just fell apart..."

For computer parts, I like www.thenerds.net and www.outpost.com (http://www.outpost.com) . Both have good prices... thenerds shipping is a bit high, but even with ground I get my stuff the next day. Outpost has decent prices and very cheap shipping.

Hey, we all need help sometimes, that's why this place is here (that and we love OCing :D ). I need it too, occasionally. Before I came here, I knew next to nothing about good cooling and good OCing mobos and stuff... I've learned a lot from others with more experience. Places like these are wonderful places to learn. Anything I, or any of us here can do, don't hesitate ask.

[phoenixpinion]

if its locked cover the b21 pin with something
i did it with slivers cut off from the sticky part of a bandaid
it works perfectly

[tainice]

I got a PII 266, and the best i could do was 333 with stock cooling...and my chip could freely change from 2~4 Anyway, the chip was amazing for i could do 150fsb x 2! wow..:eek: scared the hell out of me when i found out that!

[Fluid_Al]

AAARRRGH! :rolleyes: i cant believe i t. it was actually the CPU bus. not the FSB or the multiplier. anyhoo, i read all your great help, thanks a bunch. i think i take off the cover of PC now... eh heh

[tainice]

Originally posted by phoenixpinion
if its locked cover the b21 pin with something
i did it with slivers cut off from the sticky part of a bandaid
it works perfectly

you have to be really be careful about that trick, make sure that the tape does not get lose, or you will be in the pain of world! I remember there is a articule about such trick at tomshardware.com. you can search it and look it up. good luck.

[lennytiger]

I have a 233 PII i can get it to 350Mhz on a Gigabyte GA6BXE, its a nice chip a little slow these days but works!! It folds for me!!