New to overclocking... P 75MHz to 100MHz??

[Yogurt2]

Hi, I'm new to this board, and new to overclocking. I have an old Pentium 75 MHz sitting around, and was wondering how to overclock it. I asked a friend who does quite a bit of overclocking, and he said to only take it to about 100MHz. Can anyone tell me how to do this? Thanks for your responses.


Yogurt2

[funnyperson1]

WELCOME TO THE FORUMS :p

ok, look on your motherboard and you will se jumpers labeled fsb or spu ratio, changing any of these jumpers to a higher value will overclock the cpu.....

the cpu speed is determined by the ratio x fsb so find which combination offers you 100mhz.....

[Yogurt2]

Thanks! One other question: how high can I safely take it without having to spend a lot on cooling?

[The Coolest]

I tried that once w/ my old P75 actually EX-my
I tried to make it do 90, it just wouldn't boot, I know that what I did was upping the FSB from 50 to 66 wich gave me the the extra MHz. I dunno y but it wouldn't boot, I didn't have the mobo manual or anything written on the mobo, so I couldn't change multi or Vcore, but on defaul it just wouldn't do it

WELCOME TO THE FORUMS
& Good Luck

*EDIT*: I think that cooling it won't be a problem cause even a PMMX 200 or something like that would do the job perfectly. if u wanna have it running very cold get a Socket 7 cooler for K6 CPUs

[Yogurt2]

Ok, I opened the case up, and the only jumpers I'm finding are labeled RCVR. The only other moveable "thing" on the mobo is a set of switches. Unfortunately, I don't have the manual for this mobo, cause I grabbed it from a friend who runs a computer business that had just sold someone a different computer, and was gonna throw it out. :eh?:

[eobard]

If you know the manufacturer of the board you can probably get a copy of the manual online.

[Yogurt2]

That's another problem... I can't find anywhere that says wht brand it is. The closest thing I can find is two of the chips say Intel on them.

Come to think of it, it is a Gateway...

*EDIT* Ok, I just looked at Gateway's website, and searched with the serial number and the mobo is:

MBD WW INT P75 0K/TZ CPU

[eobard]

Originally posted by Yogurt2
Come to think of it, it is a Gateway...


Congratulations, you're boned! :rolleyes: Those things are designed to be non-overclockable. Still, if you can get a copy of the manual or a technical sheet you may get lucky. How many individual jumpers are there on the board?

[Yogurt2]

that's what I figured...

1 set of 3 (::: )

*EDIT* *sigh* smilies...

[eobard]

Well, with ony 3 binary jumpers / switches you have a total of 8 different configurations. That's 8 different possible settings that you could blindly try. If none of those choices regulate voltage then just taking a stab at all the possible combinations probably won't damage anything, probably. Other than just taking a stab at it (which I won't recommend) I've got no suggestions, sorry.

[Yogurt2]

hey, thanks anyway... I'm thinking about trying to o/c my P2 133MHz... most likely thru the bios...

this has already been overclocked to 233MHz... if I overclock it more, will I have overheating problems?

[jazztrumpet216]

Originally posted by Yogurt2
hey, thanks anyway... I'm thinking about trying to o/c my P2 133MHz... most likely thru the bios...

this has already been overclocked to 233MHz... if I overclock it more, will I have overheating problems?

The lowest P2's started at was 233Mhz. But anyway, you might, if it truly is a P2 you'll need a slot cooler, which I don't know a lot about. If it's truly 133Mhz OC'd to 233 then you'll need a socket cooler... go for someSocket 7 cooler designed for a Super Socket 7 K6.

[nil_esh]

Originally posted by eobard
Congratulations, you're boned! :rolleyes: Those things are designed to be non-overclockable. Still, if you can get a copy of the manual or a technical sheet you may get lucky. How many individual jumpers are there on the board?

Yeah, my P2-266 is on a Gateway mobo.. Won't OC at all.

[Yogurt2]

I'm not trying to start an argument, but if there aren't any P2's lower than 233, why does my screen say Pentium II 133MHz when I boot?

[jazztrumpet216]

Here's the spec sheet (http://support.intel.com/support/processors/sspec/p2p.htm) for the Intel PII processors. The lowest marked speed for a PII is 233Mhz. Perhaps your processor is underclocked or mobo is confusing MMX technology for a PII or something weird... but I'm 100% positive that's where PII's started out.

*EDIT* Or, as eobard said, a more plausible explanation might be that it's a Pentium Pro.

[eobard]

Originally posted by Yogurt2
I'm not trying to start an argument, but if there aren't any P2's lower than 233, why does my screen say Pentium II 133MHz when I boot?

I've never heard of a P2 at less than 233. My only guess is it's a Pentium Pro, I know they ran at 150 so 133 wouldn't be too far out of range and it might be detected as a P2 by some programs, not sure.

[Yogurt2]

I have no question that it's a Pentium II... I'm looking at the CPU right now... it says Pentium II with MMX Technology... the only questions is the speed...

[jazztrumpet216]

What are the markings on the top of the CPU cartridge??? That should give the best explanation of what it is. Something like (this is off the top of my PII 450) 450/512/100/2.0V S1.

[batboy]

There were no P-II's made lower than 233 MHz, that's a fact.

[Kaneda]

my pentium pro is 200 Mhz. Bios Overclock to 266 thats as far as it would let me go, i left stock sink and fan on it never had a problem. but is still slow as ****

[Yogurt2]

Ok, looks like it was underclocked in the bios... it was set at 3.5 x 66, I pushed it up to 5.0 x 66 and it still said 133MHz, then I pushed it up to 8.0 x 66 and now it says 266MHz. If I changed the clock frequency to something else, would I be able to overclock it more, or will that just cause errors? Btw, I now have a second fan on the heatsink.

[eobard]

Originally posted by Yogurt2
Ok, looks like it was underclocked in the bios... it was set at 3.5 x 66, I pushed it up to 5.0 x 66 and it still said 133MHz, then I pushed it up to 8.0 x 66 and now it says 266MHz. If I changed the clock frequency to something else, would I be able to overclock it more, or will that just cause errors? Btw, I now have a second fan on the heatsink.

That's not right at all. 8 X 66 = 533, not 266. And 3.5 X 66 = 233, not 133, and 5 X 66 = 333, not 133. I don't know what to make of all that. What program are you using to detect your speed?

[Yogurt2]

I know that's not what it's supposed to be, but that's what it says... I'm getting the speeds from the POST... I changed it to 8.0 x 83MHz and it said it was running at 333MHz. I d/l'd Sandra, just need to put it on that computer.

[eobard]

Originally posted by Yogurt2
I know that's not what it's supposed to be, but that's what it says... I'm getting the speeds from the POST... I changed it to 8.0 x 83MHz and it said it was running at 333MHz. I d/l'd Sandra, just need to put it on that computer.

Please run SANDRA (or anything else other than just the POST), POSTs love to be erroneous. When I had my K6-2 at 600mhz it used to POST as 512mhz. :rolleyes:

[Yogurt2]

k, ran Sandra on it...

with the last settings I posted, it says Intel Pentium II @ 333MHz,
model info is: P6L (Klamath) Pentium II 233-300 2.8V

[eobard]

Originally posted by Yogurt2
k, ran Sandra on it...

with the last settings I posted, it says Intel Pentium II @ 333MHz,
model info is: P6L (Klamath) Pentium II 233-300 2.8V

If your multiplyer is set to 8 then that means your FSB is running at 41.5 instead of 83mhz. Somehow your FSB is running at half of what you set it to. Either that or your bus rate is accurate but your multiple is half of what you set it to. I don't know what to think at this point. :eh?:

[jazztrumpet216]

Can you take a screen shot of that CPU Bench??? If so, post it on here, we might be able to help you. If that bus is at 41.5Mhz, the results'll be really low and we could probably tell.