first overclock

[ntejensen]

this is the first time ive done this i have a 900 mhz tbird that is in an iwill kk266 mb. here is the wcpuid stats internal clock=1030.90
system clock=114.54 multplier is 9.0 (i havent unlocked it yet)and system bus is 229. its running stable at 43c. on oem hsf

i want to go faster any suggestions you can give me would greatly appreciated

[JML]

Better heatsink/fan, and raise your voltage as needed.
Also, unlock your athlon, put the multiplier down to 7, and set your mobo to it's 133fsb, then raise the multiplier to go as high as you can stay stable

BTW- I say to put the mult down to 7 before you put your mobo at 133 because you're athlon may not run at 1200 (9x133fsb). After your set at 7x133, you'll be safer making small increments from there, like 7.5x133, then 8x133, and so on.

[ntejensen]

im new at this so let me make sure i have this right by lowering the multiplier that should allow me to raise the fsb? right know if i go past the 114fsb the system will only post. im going to get a defogger kit to unlock it. that seems to be the best solution ive seen? any suggestions on hsf?

[JML]

The reason your system won't post past 114fsb is because it is putting your PCI and AGP ports aren't running at what they should be running at. KK266 mobo's are meant to have their fsb's run at 133, so at 133 your PCI and AGP will all be running at their proper speed. The reason I say to lower your multiplier is because when you raise your motherboard to the 133fsb it might overclock your tbird higher than it can handle. By lowering the multiplier to 7 and then setting the fsb to 133, you will be assured that your tbird will be at a speed it is capable of running at. (7x133- 931Mhz- a mere 31Mhz higher than what it was meant to be run at, which is easily in a safe range)
I apologize if I'm being unclear, It's hard for me to explain things well.

A good cooler would be a SK6 from www.2cooltek.com w/ Arctic Silver2 thermal grease. The fan you use with this heatsink depends on you- I chose a sunon fan to go with it cause it's quiet, but if you don't mind the noise, there's always the delta fan

[ntejensen]

thanks for the help ill let you know how it goes im working on unlocking the multiplier right know

[ntejensen]

unlocking went fine i used a pencil however when i change the jumper for the 133fsb i lose all signal to my monitor could this be because of a cheap nvidia tnt2 videocard?

[JML]

Is your memory pc100 or pc133

[ntejensen]

micron pc133 1 128 and 1 256

[Sonny]

Bad pencil job. Losing the video signal is usually the case with a bad pencil job. MoBo cant decide what the chip is or worse you got a short. The first thing to come up is usually the video card & if there is something wrong it will not continue to even POST.

[ntejensen]

thats what happens dosent even post but only with the jumper on the 133fsb everything works fine when i switch the jumper back to the 100fsb. try the pencil job again?

[JML]

When set at the 100fsb, did you lower the mulitiplier to 7?
Try this to see if your pencil job worked-
1. Start up computer at 100FSB
2. Go into BIOS and set Multiplier to 7
3. Save your bios and restart computer
4. Your computer should now start up running at 700mhz (7x100)
(your first underclock!)
5. If the above step worked correctly, leave the multiplier at 7 but set your computer for the 133fsb

If it doesn't work- with a microscope (or whatever) check your connections, make sure all are complete and none are crossing.
:beer:

[Sonny]

Forget the pencil trick & go for conductive ink penn or deffoger repair kit & READ the BEGINNERS GUIDE at the front page.

[FRANK]

First of all, Welcome to the forums.


The Iwill KK266 motherboard uses the VIA KT133A chipset. This chipset is a revised version of the original KT133 chipset which had problems attaining a FSB much above 110 MHz. The KT133A chipset will attain 133+MHz easily and has been reported to get into the 150+MHz RANGE.

However, there is an issue when trying to use a 200MHZ ("B") CPU on a motherboard with the VIA KT133A chipset at 133MHz and above. Below I've pasted an excerpt from an earlier reply I made that addresses this problem;


>> As far as your boot problem, there is an often overlooked "issue" when using a B (200MHz) CPU at 266MHz along with the KT133A chipset. In a nutshell, when initiating the boot process, the system looks to the CPU for the default multiplier for an instant until the BIOS can take over. Therefore when trying to boot a 200MHz CPU at 266MHz FSB, your system is trying to boot at 1197MHz (the default multiplier is 9X with the FSB set by jumper at 133), this is a bit beyond the range of a 900MHz CPU.

One work-around is to set your system up with the jumpers rather than using the soft BIOS, provided that your motherboard has the necessary jumpers to support this. This method bypasses the default multiplier and will boot to whatever the jumpers are set at.

Another method to remedy this situation is to modify your L6 bridges to show a different "default" multiplier, something lower than the default 9X that the 900 uses, 7X would give you a default of 933MHz.

Bumping the Vcore up a bit doesn't hurt either, just make sure that you have adequate cooling.

You can read about this "issue" in much greater detail here (it's rather lengthy but worth the time invested);

http://www.anandtech.com/guides/showdoc.html?i=1440&p=1 <<

I hope this helps.

Good Luck!

[JML]

[JML]

:eek:


http://www.tomshardware.com/cpu/00q3/000711/amd-04.html

[ntejensen]

i thoutght i had a 266fsb chip but i could be wrong, how can i tell?
if it is a 200fsb chip than im probably stuck below 110fsb and can just bump the multi and vcore until it becomes unstable since i cant set the multi with jumpers. is that correct? it crashes in windows with a 11xmulti at 100fsb any paticular reason? dosent seem to be heat related temp is 44c. the system will run stable under sisoft sandra burn in for 1/2 hour at 46c with a 10.5 multi.

[JML]

If you don't have the jumpers you could try and change the L6, L3, and L4 bridges shown in the above link.

You said you have a 900mhz tbird, correct? If you have the 200FSB version, your default multiplier would be 9; If you had a 266 version, your default multiplier would be something like 6.5.
Anyways, the first 266fsb tbirds started at 1Ghz, so your 900mhz tbird must be the 200fsb version.

[ntejensen]

ok then i have a 200fsb chip

[JML]

Keep us informed of how it goes ;)

[ntejensen]

sure thing im at work now but will be cracking the case back open when i get home

[FRANK]

Originally posted by ntejensen
i thoutght i had a 266fsb chip but i could be wrong, how can i tell?
if it is a 200fsb chip than im probably stuck below 110fsb and can just bump the multi and vcore until it becomes unstable since i cant set the multi with jumpers. is that correct? it crashes in windows with a 11xmulti at 100fsb any paticular reason? dosent seem to be heat related temp is 44c. the system will run stable under sisoft sandra burn in for 1/2 hour at 46c with a 10.5 multi.


Here you go;

[ntejensen]

thanks for the help its its running solid at 1100 now even dropped the temp to about 39during burn in by adding another case fan. im waiting to mess with the L3 L4 L6 bridges until the new hsf gets here

[JML]

congrats! :D

[deez]

not bad for a first try

my first OC was a p166@180 hehe

[moonunit]

I also am just starting up. A friend sold me a 1GHz AXIA on the cheap, and now the fun begins..

I've blasted all the way up to 1480 and it hasn't crashed once.

My Abit KT7A has a BIOS option that seems to add to the FSB. It goes from +0-+30 (untried) and I want to know what it's doing there when you can change the FSB alongside the multiplier. Any ideas?
I've not got the guts to push it any faster, cos the temperature is pushing 55 under load. There is this 6 inch photocopier fan lying around though....

All ideas are welcome :)

[JML]

what hsf are you using?

As far as the +0- +30 thing may have to do with ram. I had an option on a Biostar mobo once, it let me select -30, clckspd, or +30 for my RAM

[Shep]

the + option on the KT7 lets you increase the FSB in incriments of 1.

[JML]

ohhh did you mean 0 to 30, or 0 and 30 :p

[moonunit]

I'm using a Thermoengine, sat on some strange grey putty that doesn't set.

Funny story concerning setting this thing up:

Nobody told me that little lumps of putty were covered by a thin sliver of plastic... Heatsink went on, temperature = 50,60,70, erm, stop that, help help, why did they have to put a 4 second delay on power off switch? Amazingly, my pride and joy survived this little melt down.

Pesky thing doesn't like x12 multiplier though.


So this extra FSB option is just a handy way of fine tuning, right? Might a soft FSB program be suitable for my testings?