***Trustly old Abit BH6 now @ 1.57 GHz! Slot 1 owners come on in***

[oldfart]

The way I see it, if you run a lower CPU speed, and lower the Vcore, you will draw less current, thereby putting less stress on the MOSFETs, or am I wrong here? I have undervolted Tualatin CPU's before (my PIII-S 1.26), and they run cooler than at default Vcore which means less current draw.

I've been playing around a bit. On my setup, I can run:
overclocked to 1.57 @ 1.35 Vcore
stock 1.4 @ 1.3 Vcore (1.3 is lowest setting available)
I ran Prime95 for ~ 1 Hr on both as a quick test. I'll do more later.

Man, I love these Tualatin CPUs! Overclock and undervolt at the same time! Makes me wonder what this thing would do with a little extra Vcore? I'd bet it would get to 1.7 or so.

I talked to my friend and explained the situation (Antos, can't thank you enough for bringing it to my attention0. I'll be putting the CPU in for him and will check out the mobo. If he has the 50n03, we are good to go. If he has the 45n03, he is willing to risk it. I'll set it up for 1.4 GHz, as low a Vcore as it will run with stabilty and we'll hope for the best.

 

[Assimilator1]

Good to see you ordered & fitted 1 with nice results oldfart ! ,1.57GHz!:Q ,I can't wait to overclock mine!
My sons Soyo 6BA+III has 1/4 PCI divider & he has a V3 so AGP & PCI speeds won't be a problem

Btw if you want to put all that power to good use you could have a look at these Distributed Computing projects ( I think you can guess my favorite ,would be intersesting to see how fast your 1.57Ghz is too at 1 of them)

Oh ,thanks for 'the mention' about telling you about the slocket T in the 1st place
I'm still waiting to get hold of my Slocket T & S370GU ,company I'm dealing with only takes cheques or credit transfer!:disgust:

Antos
Thanks for the info ,very handy
I'll pass that onto upgradware.com as I seem to have a repoir (spelling??) with tech support

Flaky Abit mbrds!

 

[StephenM]

Cybordolphin-

I purchased the Slot-T from strattoncomputers.com. It ran $20 and was at my door the next day, so I'd recommend them. I'm not affiliated with them in any way.

Antos-

My board is still sitting lifeless in my pc <sniff>. I will check which mosfets I have <had? > over the holiday and report back.

All-

Any suggestions on what to do next? Assuming the rest of my components are still working, I'd like to get up and running again on the cheap. I was thinking of getting an ST6 board from somewhere, if they're still available. I was more than happy with the performance of my tualatin/vid/memory etc. before my board got toasty. I feel a bit uneasy about selling the Slot-T to someone, though, might just donate it to a needy overclocker that knows the risks.

-StephenM

 

[StephenM]

<double post. weird.>

 

[StephenM]

<extra post>

 

[oldfart]

I'd go the the ST6 if you can find one. Nice board! If not, find another slot 1 BX board. Asus P3B-F, newer rev Abit BH6, BX6 R2, Soyo had some good Slot 1 boards as well.

BTW, I ran Prime95 for 6 Hrs on the BH6 @ 1.57 GHz undervolted to 1.35 Vcore! No errors. I have the "good" (I think) MOSFETs, but I'll run the lower Vcore anyway. I also ran Prime95 4 Hrs @ 1.4 GHz undervolted to 1.3 Vcore. No errors.

 

[rogue1979]

Yeah, oldfart I think you're right. I could get the 1.1a and run a 133Mhz fsb to keep the pci bus right, AGP bus would be about 90MHz. As good as the newer .13 micron celerons are running, I bet 1466MHz can be reached at default voltage or maybe even a slight undervolt to protect the mosfets.

 

[StephenM]

Antos-

Just checked. I had the 45no3 mosfets. Hopefully those with the newer 50/55's won't have any problems.

-StephenM

 

[oldfart]

StephenM, I see you were running 1.57 @ 1.55 Vcore. Did you need that much? The one I have does 1.57 @ 1.35 Vcore. Did I get an extra good CPU? My setup is fine so far with the 50n03. My concern is the one I'm upgrading for a friend later this week. I think its an older board and might have the 45n03. Again, if it does, I'll run it 1.4 GHz with an undervolt to as low as it will run. He knows the possible risk. I'll report on how it went when I get back to home base later next week.

 

[StephenM]

Oldfart-

I can't really say if I needed 1.55 or not....the Slot-T only has .05 increments, so with the recommended voltage for a Celly 1.4 Ghz being 1.475V, the upgradeware documentation suggests an even 1.5V. Since the voltage is set with jumpers, I decided to give myself an extra .05V to 1.55V right off the bat to see how far I could push it. I didn't want to keep opening up the case. My plan was to see if it was stable at 1568 @ 1.55V for about a week, then drop it back down to 1.5V and try that. Knowing what I know now, I would definitely suggest starting your friend's rig at 1.45V and working your way up as need be. Good luck,

-Stephen M

 

[oldfart]

What is odd is the jumpers didn't seem to work with mine. The C1.4 I have uses 1.5 Vcore as default. I set the jumper to 1.5, and that is what the mobo and SiSoft report. I set the jumpers for 1.45 and it still came up as 1.5. I leave the jumper @ 1.5 and use the BIOS Soft menu to lower the voltage to 1.35. Works just fine. My CPU has a pack date of 10/18/02. The one my friend got has a pack date of 8/15/02. If he has the 45n03 board, I'll use whatever CPU runs on the lowest Vcore. I know mine will run 1.4 GHz @ 1.3 Vcore.

 

[techwanabe]

Good job Oldfart!

BTW, have you noticed the Celeron-Tualy's are starting to get harder to find. I've been building computers at my office with C-T's and the 1.4's are harder to find.

I'm still humming along on mine. Once I removed that crappy thermal layer on my HS, my temps came down nicely. I'm only pushing to 133 FSB cause I'm not sure how far above the spec my Kingston 7.5 ns memory will go.

keep up the good work!

 

[oldfart]

What is hard to find is a decent 815E board! If you ever want to sell that ST6, LMK! I got my C1.4 @ Newegg (where else?) $62.

 

[BuckNaked]

Antos,
Thanks for posting the info on the MOSFETS, I was pretty keen on doing this with an old BH6 I have, until I found out it had the 45no3 MOSFETS... I guess I will just have to leave it running the 900 Cely I have in it now.

Dave

 

[oldfart]

I had my buddy look at his mobo. It has the 45n03 . I'm going to swap out his BH6 for mine which has the 50n03's. I'm not willing to risk the thing going up in smoke. I'll get a new mobo for the kids PC when I get back. Maybe a nice 815 board.

 

[GnatGoSplat]

Interesting upgrade! I just yanked a BH6 in favor of an ECS K7S5A and AMD XP1600+, but it would be nice to get some more use out of this old BH6.
I don't think those MOSFETs are a big trick to replace.
Anyone know where to get beefier MOSFETs?

 

[Nardman]

God I love the BH-6.

Every time I think it's done someone squeaks more out of it. This mobo is quite sumply the best board ever. I'm really gonna miss mine <I just upgraded to a a7n8x>, thems was good times. <sniffle>

 

[lookin4dlz]

Grrrrr.... I KNEW I should have kept my old computer instead of selling it to a friend for a mere $60 I had already bought the Powerleap adapter and a Dlink router (to network w/ my new computer), now both items are useless.

 

[Assimilator1]

I've heard of lot of users with blown caps on Abit mbrds ,seems to be a favourite of theres ,my fathers Abit KA7 blew them after just 18mnths!.Apparently they had a duff batch for that particular mbrd ,but like I said I've heard of a lot of other Abits blowing caps too (much more so than any other brand).

Though I haven't scoured the forums this thread and the Overclockers thread that stephenM has posted in,he is the only 1 who has had a mbrd die using a Slocket T (not a modded slocket).Maybe just coincedence?.

I got an email from upgradeware.com Tech support & this is what they had to say

Subject: RE: Possible problems with early Abit BH6 mbrds & Tualtin CPU's??

Hi Mark,

Thanks for this information.

Some power users modify their existing slotket by simply wiring some circuits in order to run Tualatin. These slotkets was not designed to run Tualatin but Coppermine. Indeed, it might generate some ?power issues? after the mod. Our SLOT-T differentiates from these mod slotkets as it was designed to run both Coppermine and Tualatin in accordance with Intel universal socket spec. Many people have used SLOT-T or 370GU (at that time, SLOT-T was not released yet) to upgrade their BH6 with Celeron Tualatin 1.0A~1.4Ghz. We have not heard any similar case such as this discussion. You will not need to worry about it.

Best regards
Tech Support


So are there any other people out there who've had BH6's die on them using the Slocket T? (not modded)
So far the only thing that seems proven is that early BH6's have a tendancy to die?
How many have died using Coppermine cpu's?

 

[GnatGoSplat]

I read somewhere (didn't save the link) that 45N03 MOSFETs are not powerful enough to support any CPU >1GHz, and that 55N03 MOSFETs are recommended.
This was on a motherboard website, I don't know that it was for the BH6 specifically or not.
So I think that is the problem.
My P4 mobo's have 55N03's coupled with 98N03's.
It would be no trick at all to replace 45N03's with 55N03's if I could find a source.

 

[neovan]

My BH6 has the 55n03 Mosfets so does that mean I am able to slap on the 1.4 Tually?

 

[Assimilator1]

Seems like it

GnatGoSplat
Think you could find that website again?

 

[mrzed]

I was starting to plan on replacing my 566@850/Soyo 6BA+IV with a Tbred 1700+. Now I'm not so sure. I was thinking about the slocket mod, but decided I didn't want to risk it.

Nearly double my CPU power for less than $100 Canadian! I love it. It would give me plenty of juice to go with the 8500le I was hoping to get.

Now I just have to think of a way to convince the wife that we need to upgrade.

 

[spanky]

wow... impressive for an old geezer bx board

 

[Assimilator1]

My son is well chuffed that his PC (Soyo 6BA+III) can now be upgraded to 1.4GHz instead of just 1GHz
Just waiting to get the Slocket T from Titanium Micros