Chaged to 100Mhz, Help!

[Hieu]

Hi,
My system is Celeron 433. I have changed the FSB to 83Mhz through BIOS and I got up to 541. It works fine, and 83Mhz is the max I can change in BIOS. I'm not happy with that speed so I decided to change to supported FSB 100Mhz on motherboard. But after changed, I cannot boot the system, it did not display anything.
Is there any solution for this, I realy want to pass 541
Thank you
H

[Placid]

What motherboard brand/model?
If you cant get it set with jumpers/bios then maybe you can use soft fsb.
You can find soft fsb at www.tweakfiles.com

[Endeavor]

100 maybe to far out of ur reach, u will have to reset ur CMOS, on my soyo6vca its a white jumper that u must toggle to reset it

[outhouse]

if you can read your manual to reset CMOS you may have a jumper on your MB also you may have to take out the battery on your MB.

[Endeavor]

outhouse (Jun 24, 2001 01:55 a.m.):
if you can read your manual to reset CMOS you may have a jumper on your MB also you may have to take out the battery on your MB.

which i thought of that :)

[Hieu]

Hi,
My MB is P61440BX BrillianX 1S, actually there's a JP4 on MB and there's intruction next to JP4 with
"JP4: Open (100Mhz)
Close (FSB auto) "
It's CLOSE status at the moment, so it hung when I remove the JP4 to set to 100Mhz

Thx
H

[Hieu]

I'll try to reset CMOS

[Hieu]

It did not help, reset CMOS, open JP4, turn on PC and hung. I have to come back to 541

Any ideas

[Phil]

can you boot now you've reset the bios and put that jumper back on and it's only at 100mhz that you can't boot?
If so then 100mhz is obviously too much, at least at your current votage and with your current cooling.
a 433 on a 100mhz fsb is 650mhz, the mendicino core tops out around 600mhz so with standard air cooling I would be very surprised if you achieved this.

[Kingslayer]

I used to have a 433. They won't do the 100Mhz FSB. Sorry. If it's a slot you can modify pin b21 and get it, but if it's a socket, your outta luck.

[Don Stefano]

Kingslayer (Jun 25, 2001 08:30 a.m.):
I used to have a 433. They won't do the 100Mhz FSB. Sorry. If it's a slot you can modify pin b21 and get it, but if it's a socket, your outta luck.

Just on that b21 pin issue. I can't see why no-one has been able to do something similar with the socket chip.

On looking through the following Intel® Celeron™ Processor Data Sheet (ftp://download.intel.com/design/celeron/datashts/24365816.pdf), if you check out the corresponding section for PPGA sockets, the pin is AJ33. Surely, you can apply some 'thin barrier' over the pin to stop the pin being detected and thus 'trick' your mobo into thinking you have 100MHz FSB just like the B21 trick. Yes/no?

Any one willing to try? I will, if anyone can suggest a sensible way to block that pin.

BTW, this is my first post. I have not had much field experience on the topic but I am well up to speed on the theory and I appreciate any feedback.

[Hieu]

Hey,
I'll try to see if I can cover pin21, is there any one who did it, please give me your experience

Thank
H

[Don Stefano]

Hieu (Jun 25, 2001 10:11 p.m.):
Hey,
I'll try to see if I can cover pin21, is there any one who did it, please give me your experience

Thank
H

Hey Hieu

Here's the article at Tom's Hardware:

How to Get All 66 MHz Slot 1 CPUs Running 100 MHz (http://www6.tomshardware.com/cpu/98q2/980514/). Best bet would be use adhesive tape to see if it works. Enjoy and good luck dude!

[Hieu]

Hi,
I've checked out the doc, my CPU is slot. but I really don't know which one is mine( SEP, PPGA or FCPGA). Look through the figure, it seem it's SEP(I'm not sure)
Pls advice
H

[Don Stefano]

Hieu (Jun 25, 2001 10:31 p.m.):
Hi,
I've checked out the doc, my CPU is slot. but I really don't know which one is mine( SEP, PPGA or FCPGA). Look through the figure, it seem it's SEP(I'm not sure)
Pls advice
H

Hey H

Don't worry so much about the doc. Could be good supplementary reading for the Tom's Hardware article I mentioned in my prev post (see above). Your Slot 1 chip is a SEP, ok? Just save the article to your PC and pics (don't forget 'em), get it printed out and try it out OK?

[Hieu]

It's a very good artical. Actually I did it before but might be wrong PIN. I'll try again and let you know

[Phil]

Don Stefano (Jun 25, 2001 10:13 p.m.):
Just on that b21 pin issue. I can't see why no-one has been able to do something similar with the socket chip.

On looking through the following Intel® Celeron™ Processor Data Sheet (ftp://download.intel.com/design/celeron/datashts/24365816.pdf), if you check out the corresponding section for PPGA sockets, the pin is AJ33. Surely, you can apply some 'thin barrier' over the pin to stop the pin being detected and thus 'trick' your mobo into thinking you have 100MHz FSB just like the B21 trick. Yes/no?

Any one willing to try? I will, if anyone can suggest a sensible way to block that pin.

BTW, this is my first post. I have not had much field experience on the topic but I am well up to speed on the theory and I appreciate any feedback.

Yes it is possible but it is pin aj31 not 33, 33 is for the 133mhz bsel option.
Most boards don't need to do this anyway only cheap intel crap and when someone says they have a board without options I will suggest this to them but only if they have a chip capable of the bus speed, the the 433 is rarely capable without monster cooling

[Don Stefano]

Phil (Jun 25, 2001 11:10 p.m.):

Yes it is possible but it is pin aj31 not 33, 33 is for the 133mhz bsel option.
Most boards don't need to do this anyway only cheap intel crap and when someone says they have a board without options I will suggest this to them but only if they have a chip capable of the bus speed, the the 433 is rarely capable without monster cooling

Are you sure it's pin AJ31? This is for a P-PGA not a FC-PGA.

[Don Stefano]

Hieu (Jun 25, 2001 11:02 p.m.):
It's a very good artical. Actually I did it before but might be wrong PIN. I'll try again and let you know

You might have to up the voltage. Don't know if your mobo will do it for you thru BIOS setup otherwise do it urself. Default is 2.00V. Check these sites on how to do this as it involves covering more pins. And read carefully. If you set it to 3.5V by mistake, say bye-bye to your chip.

Intel Celeron Overclocking (http://www.uni-koblenz.de/~tcsmann/pagese/cel01.htm)

Celeron Tech Stuff (http://www.geocities.com/celeron_overclocker/voltage1.htm)

If it gets to Windows fine after all of this, turn it off and then find a way to cool the bitch down.

[Phil]

Don Stefano (Jun 25, 2001 11:19 p.m.):
Are you sure it's pin AJ31? This is for a P-PGA not a FC-PGA.

oops my mistake, it is pin aj33 for 100mhz bsel selection, aj31 is for 133mhz fsb
thanks for watching my back hope no one screwed things up

[Hieu]

I did exactly as in the guide but the same as I changed JP4, It did not display anything. If you think because the colling problem so it should be able to boot at first then may be crash. But here, nothing at all
I don't know why my celeron cannot operate in 100Mhz
Any suggestion

Thanks

[Don Stefano]

Hieu (Jun 27, 2001 05:37 a.m.):
I did exactly as in the guide but the same as I changed JP4, It did not display anything. If you think because the colling problem so it should be able to boot at first then may be crash. But here, nothing at all
I don't know why my celeron cannot operate in 100Mhz
Any suggestion

Thanks

Sorry I don't understand re: your JP4. Is it closed or open? If you close it, you let the mobo automatically (key word) decide which FSB to run at. Covering b21 pin should help the mobo make the decision in running @ 100 MHz FSB. Cooling is not the issue if you just want to see it go to Windows and maybe test a game out or two. And don't forget your voltage. Get it at 2.2 or 2.4V, no higher. You've got a better chance than me since you've got a BX board and I don't. Tom's Hardware says any BX board. Don't know anyone to get it to work on a non-BX board.

I tried the same thing on my generic slotket which has a PPGA 433 on it. I've managed to successfully change the voltages accordingly but I can't get the B21 trick to work. Possibly because I've got a Jetway720BF mobo which has the sis620/5595 chipset which probably doesn't allow this trick (I dunno). The FSB settings are (Default, 66, 75, 83, 95, 100, 112, 124). At default it runs at 66. When I take off the 66/100 jumper off the mobo to run @100 automatically it doesn't boot at all.

The best I've been able to do is set it 100 MHz in BIOS (without taping b21 pin) at 2.4 V (taping appropriate pins) and get it to POST but then it freezes. I've resigned to the fact that I will never get this bitch @ 650 and cooling has nothing to do with it. Looks like it's back to 541 for me.

In closing, good luck Hieu. :)

[Hieu]

HI DOn
actually I close JP4 when I cover B21 to let it choose FSB auto, but it failed. At other threads, it is said that with celeron < 500 Mhz, we cannot operate it more than 600Mhz, may be my CPU fall into this issue. DO you know which software is the best to change the FSB ? BTW, there's no option in BIOS for me to change voltage

Thx
Hieu

[DAppel]

in my Soyo 6VBA133, I can set the jumper to operate at 100MHz and hold the PageDown key
at post. This makes the mobo post at 66MHz, but the FSB range available in BIOS becomes 90 to 124MHz, because this is the speed officially set by the jumper. This is a min CPU speed mode, usefull for trying FSBs without clearing the CMOS.

I've seen this work with many motherboards (not only Soyo boards), so give it a shot. Maybe your chip can't do 100, but it may do 90MHz.

By the way, I'm not sure if it is PageUp os PageDown. Try both :) .

[Hieu]

You are lucky, you can have from > 90 in BIOS, but mine is very bad, FSB I can set in BIOS is from 66 to 85, that all I have, cannot change voltage either

[Wunder]

I dont think youve upped the voltage enough.
Identify the VIDs on your processor. Download the P2 datasheet from developer.intel.com, look at the Voltage Identification Definition table. You can see there that by covering the correct pins you may achieve 2.2, 2.4, 2.6, 2.8, 3.0, 3.2 and 3.4 Volts (never go over 2.4).
Now get a better hsf, me recomend an Alpha PEP66 with a 60 mm Delta 38 cfm fan (loud but effective) or any 80 mm high cfm fan with a 80 to 60 converter.
Apply the hsf correctly and set voltage to 2.4 and burn in at default speed for some weeks. Then cover pin B21 and see if it works. Maybe youll get lucky...

[Don Stefano]

Hieu (Jun 28, 2001 02:25 a.m.):
BTW, there's no option in BIOS for me to change voltage

Thx
Hieu

Ditto what Wunder said and allow me to redirect you to my previous post with these links regarding voltage:

Intel Celeron Overclocking (http://www.uni-koblenz.de/~tcsmann/pagese/cel01.htm)

Celeron Tech Stuff (http://www.geocities.com/celeron_overclocker/voltage1.htm)

Apply tape over the correct pins to change the voltage. Should be A120, A121, and B119 for 2.4V. No need to tape B120 as this circuit is already opened internally(i.e. no connection). When you check the BIOS after POST, the Vcore reading should change from 2.00V to whatever voltage you're aiming for.Please do this on default FSB (i.e 66) just to check if you're changed the voltage before you aim for 100 MHz.

Use 2.4V if you want the 100Mhz FSB. Don't forget to cover B21 as well when you attempt it OK. I hope everything is self-explanatory. I'm still peeved I can't do it myself. Anymore Q's let me know. Wunder is probably right regarding burning in the CPU at default FSB @ 2.4V, if you're willing to wait tho. As he said you'll have to get a better HSF coz it will get hot. Might have to try it myself as it's really a last resort.

Good luck Hieu. You're our only hope.

[CrystalMethod]

I'm a lil' bit confused...
Personally I think Hieu should start from scratch. Clear the cmos, then take it from there. Hieu, if you haven't been able to clear your cmos, here's the almost sure fire way to do it.
1- shut off your system.
2- turn off the power switch on your power supply. (if it has one)
3- disconnect the power cable to you power supply.
3- take out the battery on your motherboard.
4- push the power button on your front panel. (you should get a brief surge of power through the system. i.e.: system fans should spin for a sec.)
5- put battery back in place.
6- plug in your power supply and turn it to the on position.
7- turn on your system, and hit "del" to get into your BIOS.

You should be able to take it from there. If you run into any problems, just post again.

[Hieu]

Thank all you guys
I have manual so I did clear CMOS before trying to cover b21 but it failed. It seems you guys think that the PC cannot boot at 100Mhz because of voltage ? If you sure it is, I'll try one more time to change the voltage

Hee, I'll let you know soon

[DAppel]

My cel333 couldn't make it to 100 fsb without setting the voltage to at least 2.4V. It worked fine for 2+ years, then I bought a coppermine.

But remember, the 333(5x66) at 100fsb gave me 500MHz, way below the mendiccino core limit.

I had a REALLY HARD TIME to take it to 550, even with freon cooling and 2.6V I couldn't keep it stable. That chip was surely on it's limit, and I think yours is too.

But that's just my experience. It sure is good to share it with others, but in NO WAY it should stop you from trying.

Good luck.

[DAppel]

Regarding my previous post (24),
let me try to explain again.

Today BIOSes arrange FSBs blocks, each one offering you a different range of FSBs. This blocks are determined by the PCI and AGP divisors used.

For 66MHz, we should use a PCI divisor of 2 and a AGP div. of 1.
For 100MHz, PCI div. 3 and AGP div. 2/3.
For 133MHz, PCI div. 4 and AGP div. 2
These are the industry standard clockspeeds.

As we all love to use non-standard clockspeeds, the BIOS only offers FSBs in groups that (paired with their respective divisors) keep PCI and AGP clocks at a "safe" range.

The FSBs are :
66MHz group
FSB 66 ~ 83 MHz
PCI range 33.3 ~ 41.5 MHz
AGP range 66.6 ~ 83.3 MHz

100MHz group
FSB 90 ~ 124 MHz
PCI range 30.0 ~ 41.3 MHz
AGP range 60.0 ~ 82.6 MHz

133MHz group
FSB 127 ~ 166 MHz
PCI range 31.4 ~ 41.5 MHz
AGP range 63.5 ~ 83.3 MHz

So it's perfectly normal that your BIOS (with jumper set to 66) only offers you 66~83MHz.

Once you set the jumper to 100MHz, the BIOS assumes you are willing to use the standard speed (100MHz). At this speed your CPU won't POST. By pressing PageDown and POSTing you can make the BIOS ignore the setting and use the lowest possible speed (66MHz). But, as the jumper is set to 100MHz, once you enter the BIOS screen you'll notice that the FSBs offered now are in the 100MHz group range.
It then should be easy to try 90MHz and see if the chip can take it.

There is always the possibility that it won't work, as all motherboards and BIOSes are made different.


Sorry if the english is bad.
I'm brazilian.
Brazilian = bad english


Good Luck !


(Yes, I know it's boring to read all this stuff. Who said I've got what it takes to be a teacher anyway ?)

[Pinky]

You write better english than me most of the time :)

[Hieu]

Hi,
I have adjusted the voltage from 2.0 - 2.05 - 2.1 - 2.2 - 2.3 - 2.4 (tried a lot! and I make sure by view voltage in BIOS) by the jumper but it didn't help to run at 100Mhz. I tried both ways - covered b21 - open JP4(100Mhz) but the same
Now I see I have tried a lot and it seems no way to reach 100
ANy ideas now

[Don Stefano]

Hieu (Jun 30, 2001 12:47 a.m.):
Now I see I have tried a lot and it seems no way to reach 100
ANy ideas now

I think we have exhausted all the ideas possible Hieu. I would say go back to running @ 83 FSB and be happy with that. Mating call of the loser yes, but maybe with your chip like mine was not meant to be. Thanks for the challenge.

[hooziewhatsit]

does anybody know if that b21 trick would work on an LX board?
right now I have a celery 366@457 (83 fsb).
My question is, even though my board apparently doesn't support a 100 fsb would it still work?

I'm guessing it won't, but I just want to see if there's a chance before I try it.

thanks

[Don Stefano]

hooziewhatsit (Jul 01, 2001 02:43 a.m.):
does anybody know if that b21 trick would work on an LX board?
right now I have a celery 366@457 (83 fsb).
My question is, even though my board apparently doesn't support a 100 fsb would it still work?

I'm guessing it won't, but I just want to see if there's a chance before I try it.

thanks

Does your LX board have a 66/100 MHz jumper on it of some sort. Otherwise, if there is no other way to get 100Mhz, I s'pose it wouldn't hurt to try regardless. The worst that could happen is it won't boot up. Won't kill anything esp your curiosity.
Good luck.

[Don Stefano]

I've gotten the bitch to POST and boot W98SE at that Celeron433@618@ 2.4volts.

I'm running my PPGA C433 on a generic slotket on a Jetway 720BF mobo with 200W PSU. I've changed a Global Fop-32 HSF to fit on the celery and I've got 64Mb PC100 memory, and 32Mb Riva TNT2M64 v/card. 3dmarks2000 keeps crashing on me however so stability is still a prob.

I'm still seriously aiming for 650 on a wing and a prayer. Does anyone think I can do it with all the crap I have?

[DAppel]

I have never seen a LX board with 100MHz support. As far as I know, the LX chipset is only meant to do 66~83, because it can´t divide the PCI bus by 3, only 2.

If there is any way to get more FSB from a LX, please tell me!!! I have a Cel333 running at 416 on a LX, and it would be great to get some more speed.

Thanks.