Cant get my celeron 400 over 499mhz, but why?

[Dat]

Does anyone know why i cant get my celeron 400 over the 499 mark?

Its not because of heat, cos its nice and cold, i wondered if it was because of the fact i am using a scoket 370 to slot 1 converter (on a soyo SY6VBA 133 motherboard) ? There are jumper switches on the converter, but i dont know what they do, and i havent got a manual or anything for it :confused:

What happens is if i set it too higher (540 mhz) in the bios when it boots up it defaults back too 400 mhz :confused: , and if i change the speeds using CPUcool in windows it locks up :confused:

Any ideas would be much appreciated.

[Dat]

just thought i would add the fact that i have tried adjusting the Voltages, and still does the same.

[The Doors]

*Edited

Hi Dat,
the jumpers on slotket are used to change the voltage of the Chip, but i note that yours Celeron 400 works @500Mhz with a Fsb of 83Mhz and only theorically your next step will be 100Mhz of Fsb, coz they doesn't works so high without a superior cooling section, like you can check looking the Cpu database section on the home page.

Be happy, you just got a great OC (25%).

[DAppel]

Did you set the Boot-up FSB jumper to 100MHz ?

You should set :
JP7 (beside the ISA connectors) to OPEN
JP2 (beside PCI #2) to 1-2 position (it's a 3-pin jumper, short pins 1 and 2).

This sets the board to WORK with ~100MHz FSB, but doesn't set it to RECOGNIZE a 66 as a 100 one.

Now set these jumpers :
JP9 (just above the AGP slot) to SHORT
JP8 (uppermost edge of the board, near the CPU) to OPEN

This "tricks" the chipset to think that your 66MHz CPU is a 100MHz one.

I've got two of these boards, as well as a celeron 400 stacked on a CR@PPY @SS slocket. This combo runs at 570MHz 2.1V stable.
I am SURE it can pass the 600mark, but it's my brothers comp, so I can't push the envelope too much...

Anyway, Good Luck !

-----------------------EDIT----------------------------
"This "tricks" the chipset to think that your 66MHz CPU is a 100MHz one. "

Also known as the B21 trick. On this board there is no need to tape the pins. It has a jumper connected to that pin that does the job.
---------------------------------------------------------

[CrystalMethod]

Which slot adapter do you have? The jumpers on them usually control FSB, and VCore. Need to check those too.

[DAppel]

I've never seen a slocket that can control FSB.
Are you sure of this?
As far as I know, they only control VCore and the B21 pin (few do).

[cyberey66]

The 400s and 433 dont OC well. I have a 433 but got it to 540 and thats it. Its not a heat issue. I would just get a 600.

[The Doors]

For DAppel,
you can chek it, taking a look to the manual of the Asus slotket :-)

[Dat]

i know 100% that on my slotket it has a jumper switch, that according to the slotket board itself changes the FSB speed from auto to 100mhz.

And by the way, thanks for the helps guys :)

I will try this jumper setting soon, and let you know how it goes ;)

[cyberey66]

I have a 433 and the same problem the most I get is 83 fsb its definatly not heat. I had an orb and just now put on a huge heatsink for p4s but no higher speed. Its just the 400 and 433 dont OC well. No jumpers will make it faster, or standard cooling.

[Dat]

Damn, new mobo and processor for me then ;)

[DAppel]

I think I know what you mean.
It actually doesn´t change the FSB, but only informs the motherboard that a 100MHz (or 133) chip is present. It´s the B21 trick (in the 100MHz case, I don´t remember the pinning for the 133 trick).

Now I got it.

[DAppel]

Dat, there is no need to get a new proc or mobo.
Yours aaare just fine, I have a similar system and it overclocks well, 570 stable at 2.1V.

Did you set the jumpers as I told you ?
Look at my first post.

[Dat]

i tried altering the jumpers and setting a higher Vcore voltage, but no change, still no post or anything :confused:

Ow well, new mobo and processor like i said before then :)