1Gz Celeron system - sockets? memory?

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I don't have any specs for my friends system, except that it currently has
128meg of memory and a 1Ghz Celeron CPU.

I've got some spare parts and want to do some upgrades, so I'd like to know
what possible senarios I could run into. I don't expect detailed replies,
just a general "what might it be" replies.

- What sockets did the 1Ghz Celerons come in?
- What kind of memory was used in systems with 1Ghz Celerons?

Unfortunately it's a bit of a trip to go see the machine, so I'd rather
bring extra parts than make two trips.


Re: 1Gz Celeron system - sockets? memory?

Calab wrote:
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You can look in the Celeron section of http://processorfinder.intel.com
for the possible processor types. They look to be S370 socketed processors.
Your upgrade options might depend on FSB speeds available, whether
the board can handle a Tualatin or not, what shape the BIOS is in.
This FAQ will give you some idea about the number of details involved.


I'd probably take along a couple 256MB low density (16 chip) memory
modules, and leave the processor as is. This is an example of
a memory module likely to work - CT32M64S4D7E.


If you want to upgrade the processor, you might record the motherboard
details and make a second visit with a replacement processor and
BIOS upgrade.

Another option, might be to get the owner to run Belarc Advisot,
Everest Free Edition, or even CPUZ or the like, and get some details
about the hardware that way. You can try these programs out in
advance, to tell the machine owner what information you require.



Re: 1Gz Celeron system - sockets? memory?

Calab wrote:
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In general it's probably an 815 based board. Which Intel says "The
Intel® Desktop Board D815EGEW supports a single Pentium® III processor
or Intel® Celeron® processor. The system bus speed is automatically
selected.The processor connects to the desktop board through the 370-pin
FCPGA socket."

The Celerons all seem to support a 100MHz buss and used PC100 memory.
IDE drives and on board video are most likely. Video sockets if present
would be AGP.

Re: 1Gz Celeron system - sockets? memory?


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It might be one of several different chipsets, some of which
are limited to 512MB memory but others can go to 1.5GB,
possibly more.   The best chipset it could be is Via 694T,
which would allow you to upgrade to a Tualatin P3 or
Celeron.  Next best would be Via 694X, allowing high density
memory and 1.5GB worth like with 694T.  Intel 820 (i820)
uses more expensive RDRAM which you probably wouldn't have
sitting around in gigabyte quantities... but who knows?

i815 limits memory to 512MB, pretty big handicap for most
modern OS versions.  Probably some i810e chipsets too with
similar or more limitations.

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socket 370

See above.  Low or high density PC100 to PC133 usually.

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You'd be better off making two trips.  Too many small issues
can thwart what seems like a simple and straightforward
upgrade.  Take all the memory you have, and have memtest86+
bootdisk/whatever ready to test memory for a few hours.  See
if you can get the board make and model and take the newest
bios for it to flash.  Celeron 1GHz was near enough to the
ceiling processor for many boards that it may not be worth
bothering with unless it's a Tualatin supportive chipset and
you had a Tualatin processor (or an adapter to allow support
on other older chipsets).

Personally, I'd just grab all the 256MB and 512MB PC100 and
PC133 modules I had lying around and see which will work.
If the hard drive is as old as the rest of the system then a
newer hard drive would help and the old one is now old
enough to be at the end of it's expected lifespan, a
liability to data at this point.  The fans might be on their
last leg too, take a couple in 50, 60, 80mm sizes and some
nylon wire -ties in case you have to improvise on how to
attach them (in case there's a custom fan that had a bracket
instead of screw mounts like the original OEM celeron 'sink
or a video card 'sink might.  Take a spare video card fan if
you have one, though these are more custom and hard to
replace in the field if you don't know what you're dealing
with yet.

Correction - 500Mhz Slot1 system - 440BX chipset

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Looked at the PC last night. CPU is only a 500Mhz slot 1 Celeron - 100mhzx5,
512m cache, 2.0v.

HDD is a 10gig WD IDE. I'm hoping to replace this with a 40 or 60gid ,
depending on what I have in my spare parts bin.

I've upped the memory on this machine to 384 meg, which has helped a lot. I
also replaced the Trident AGP card with a nVidia 5200? AGP card.

Mainboard is a Seanix Columbia III. The chipset is the Intel BX440. I've
found a PDF for this board, which should help a lot. Multipliers seem to go
from 350 to 550Mhz. Manual says that this board can take Celeron, P2 and P3
processors. It doesn't mention CPU types or voltages.

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So, at this point I'm just wondering what CPU's that I can use in this

I do have an Asus Slotket adapter rated for CPUs up to 133Mhz and
Coppermines. I did find a 1Ghz P3 socket 370 chip @ 100Mhz and 1.75 volts.
Would this work?

Thanks all!

Re: Correction - 500Mhz Slot1 system - 440BX chipset

Calab wrote:
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The multiplier control is irrelevant, as the higher speed processors are
multiplier locked, and any DIP switches don't affect them. Where the
multiplier becomes an issue, is for some of the processors above 1GHz.
Some older BIOS editions, combined with a high multiplier locked in the
processor, caused the BIOS code to fail while it was parsing the
characteristics of the processor.

Your Columbia III appears to be similar to my P2B-S. In Roland's FAQ,
the line "P2B-L/-S/-LS rev. < 1.04 pcba D02" corresponds to my board.
The entry for Coppermine reads "Y3"

Y3 - Not officially supported, but no known problems other than that
      you need a slotket adapter which must be fcpga compliant and
      must have voltage adjustment jumpers, which must be set to 1.8V

There are two generations of voltage regulator chip. See the VID table
in these two documents.

(VID table page 7) - regulator goes to 1.8V but no lower

(VID table page 8)

Your board likely has the equivalent of the regulator described in the
FN4417.pdf document. If you plug a 1.75V slot1 processor into the board,
in fact the regulator gives zero volts, and the computer will not POST.

When I wanted to use a Coppermine processor on my board, I did a
"VID signal mod" to the slot1 processor. I changed the VID code
it sends, to read the 1.8V voltage value. The extra 0.05V doesn't
hurt that processor. Whatever processor module I was using, it
took one cut and one wire strap, to send the correct VID value.

If you purchase a slocket that can handle a Tualatin, they need a
supply voltage of 1.5V. If you change the VID status signals on
that processor to 1.8V, the processor burns out in three weeks to a month
of operation or so. When I wanted to plug a Tualatin into my
board, I actually purchased the regulator described in FN4567,
and soldered that to my motherboard, in place of the regulator
described in FN4417. That allowed me to use a 1.4GHz, FSB100
Tualatin in the board.

So I'd break the options down like this

1) Use a slot1 processor without modification. If your board
    has the wrong regulator, there'll be a limit as to what
    can be used, and have the processor ask for 1.8V or higher.

2) Use a Coppermine processor module, and do the VID mod to
    some of the five VID signals. Or, purchase a slocket with
    DIP switches on the surface, that allow setting the VID value

3) For usage of a slocket and Tualatin, you could change the
    regulator to a pin compatible one. I got real lucky on my
    board, that such a regulator was available for purchase.

4) Use the Powerleap slocket, typically shipped with a
    Tualatin from Powerleap. It has an onboard regulator, to
    supply the 1.5V needed. The Powerleap avoids the regulator
    issue entirely.

For any of the above, you'd want to do research into what
kind of BIOS is provided with the Seanix. It might not have
microcode support for a Tualatin in the BIOS file, which
is not a big deal, except for an annoying message on the
BIOS startup screen. But if you use a processor where
the multiplier value conflicts with what the BIOS can
handle without a problem, then certain processor choices
might be best avoided.

Examples -

1) A Katmai uses 2.0V, and that voltage is high enough that
    either kind of voltage regulator would work. This is
    a 500MHz, FSB100 processor. But the machine already has
    a 500MHz processor, so there isn't any room for significant
    improvement here.


2) For the processor you named, a S370 1GHz Coppermine plus
    a slocket, then you'll need to modify the VID code
    sent by the processor, to 1.8V.


    The current VID is for 1.75V

    0 0 1 1 0   = 1.75V

    and you need to change that to the 1.8V value

    0 0 1 0 1   = 1.80V

    Two bits need to be changed, so either use the VID
    DIP switch on the slocket, or you'll need to do one
    cut and one strap, to fix the code.

    One way to make these changes, is to put tape on a contact, to
    make a logic 1. And use a U shaped bare wire, stuffed in the
    SC242 motherboard connector, to make a logic 0 where needed.
    But that could go flaky, and is only recommended for your own
    machine, since you'd understand what was done.


    Instead, I'd make the changes right to the slocket itself. You'll
    need a datasheet from Intel, with the pinout for SC242 slot1,
    so you can verify you're modding the right pins on the slocket.

3) Purchase a Powerleap, complete with processor, from Ebay.
    I'd aim for a 1GHz processor, for least problems with the
    BIOS. Right now, I see a few 1.4GHz ones for sale.


I've had three different processors in my motherboard, so I've
done a few of these experiments. I didn't like the Tualatin 1.4GHz,
because it made the Vcore regulator run a bit warm. I've never
tried a Powerleap, as that is too easy :-)

My motherboard had a 300MHz/FSB66 Celeron to start, then overclocked to
450MHz, then I tried 1GHz, 1.1GHz, and 1.4GHz processors, and
settled on the 1.1GHz as the final install. Of the latter three,
one was a Coppermine and the other two were Tualatin (made possible
by the voltage regulator chip change).


Re: Correction - 500Mhz Slot1 system - 440BX chipset

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Thanks for all the help. It's really appreciated! Looks like I'm good to go
then. I'll know for sure next Tuesday!

Re: Correction - 500Mhz Slot1 system - 440BX chipset

Calab wrote:
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I found a manual for the motherboard, here. There is no info here, on
the things that count for upgrading. JP5 thru JP8 will have no
effect on your 1GHz Coppermine.



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