rescue a tualatin from the 'BX mod' possible?

[willem]

Many moons ago i modded a celeron with a tualatin core to run on my abit BH6 with the 440BX chipset follwing the method on this page:
http://digilander.libero.it/grandecigno/Tua_BX_41.htm

Now sadly the IDE channels on the BH6 seem to be caving in so i need to replace the mobo.(spontaneous reboots when traffic goes from IDE1 to IDE2 channel and vice versa)
Since this is a server i'd like to spend as little cash as possible,
and i like it to consume little energy, so i thought sticking with
the s370 socket and taking the celeron and all the rest to the new
mobo would be the way to go.
But... i have no clue what will happen with AN3, AK4 and AJ3 having been removed running on the new mobo with the 815E chipset.
What problems will i run into?...will it run at all?...and if not,
would it be possible to 'glue' replacement pins on and from what
material if so.
Wouldn't be too shocked when blowing up the CPU, but i don't wanna ruin the new mobo

Cheerios

[ol' man]

Did the digilander site tell you to simply rip out the pins? I was always against doing that. I saw no reason for it. Popping up the zif socket allowed you to manipulate the pins inside the socket quite easily.

Anyway I think I have heard the chips where they ripped the pins out seem to work fine in i815e's though.

[klenot]

willem,

Are you sure, that what causes the problems on your server, is the southbridge? In my opinion, your troubles are due to aging capacitors.

Anyhow, even if the malfunctioning component is the southbridge, there is another way how to rescue your server - an add-on disk controller. If yourdrives are the same, the RAID controller would do the best job for you.

[willem]

Not 100% sure, but since the spontaneous reboot only happens when data goes from IDE1 to IDE2, and not when xfering from IDE1 master to IDE1 slave i thought the only thing wrong could be the bridge.

I have thought about a raid card but figured that for the money i'd be better of with a new mobo, since this one is getting really old

[Lancelot]

Check the capacitors around your CPU socket, if they're bulging or have tiny cracks in them then that's what's been causing your spontaneous reboots. These boards were plagued with bad caps at the time, but if it's just one or two you might be able to replace them and save your board! The first symptoms are spontaneous reboots when the system is stressed (like your major IDE performance, or 3D gaming) or USB crapping out all of a sudden...

[willem]

Thanks for the tip, checked em yesterday and they seem fine, no cracks and no bulging as far as i can see. It's a BH6, served me well.
As for stressing the system, i can do whatever i want, run a burnin prog for hours and hours..copy data from from master to slave on either IDE, no reboots.
It only spon boots, occasionally, when having to go from one IDE to the other, would that put more stress on a system than when it stays 'within' an IDE channel?

[klenot]

would that put more stress on a system than when it stays 'within' an IDE channel?


It depends on current requirements of a particular HDD. Maybe, the one attached to secondary IDE is "more hungry" and draws more current from the power supply, which causes drop of voltage and it can drop below some critical value and causes reboot. During IDE transfers, the CPU and the northbridge also needs more power (and memory too), because on the BX, the disk transfers are done by CPU, not purely by the northbridge (I mean, the BX can not do DMA transfers, thus it burdens the CPU).

Capacitors can be "tired" even they don't look to be. And older (BX era) boards, and especially the ABITs are known for its "low-budget" capacitors.

In a case, when one uses such a board with power demanding CPU, they become weak for sure after 2-3 years. So, it's a good idea to replace the original ones with fresh ones, and even better with higher capacity and voltage than the originals was. After this, such boards become "new-born" and work fine for several next years.

[willem]

Hmmm...interesting, thanks for the tip, i'll go look at the local electronics shop and see if they have the right caps.
Never actually soldered on a mobo before but i like an experiment
:)

In a case, when one uses such a board with power demanding CPU, they become weak for sure after 2-3 years. So, it's a good idea to replace the original ones with fresh ones, and even better with higher capacity and voltage than the originals was. After this, such boards become "new-born" and work fine for several next years.

[Mr Meltdown]

I have a celeron 1.0A here that's de pinned and no IHS on it, I've tried it in these chipsets:

Intel 815EP: works fine.
SIS Tualatin (630T??) works fine.
VIA Tualatin (694T?) hangs at desktop in WIndows 98SE (not sure about other OS)

CHeers,

MM

[klenot]

Hi willem,

Here is the photo of the BH6. I've tried to guess what caps are for filtrating what current, but treat it as just my guessing. I don't know it for sure.

http://andilek.com/bh6.jpg

1 - northbridge, southbridge, maybe memory too
2 - CPU Vcore
3 - CPU VTT
4 - AGP slot
5 - memory

Anyhow, you can replace all these caps, and you do not lose anything. You can only win.

You can use caps with higher capacity and voltage. Probably on your mobo there are 1000 or 1500 uF/6.3V ones. Instead of these, you would be better if replace them by 2200uF/10V. In this case, you can buy the ordinary 85 C temp type, not the expensive 105 C ones, becuase, once the caps are overlarged, they never get into such high temperatures.

But, sometimes, there is a problem with larger dimensions of replacing caps, in comparison with replaced ones. In such cases, I used to place them like on the following picture.

http://andilek.com/caps.gif

btw. does anybody know, how to upload a picture to oc-forums server? In the moment the pictures are on the server of my firend, but maybe I will have to remove them later.

[1-Man-Army]

u sohuld have done the 7-pin mod it is way better, u can undo it and its really easy to do.