Compatible CPU down-grade?

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Here in the 3rd world it's difficulty to buy a SATA+IDE MoBo.

For the one that I eventualy found, I bought without the CPU,
which the seller described as a Dual-Core-Celeron.

I had previously only seen chips-with-pins.

The MoBo's spring loaded pins which contact the CPU's lands,
look as if they come up at an angle; which seems strange.
And one in the inner ring seems bent: it's differently lined up.

Since I refuse to be fooled by all this multi-core-crap,
I plan to get the cheapest compatible CPU.
It's just to copy IDE's to SATA.

How many mounting/pin-configurations are there for x86 these days?

The MoBo is marked as a : "PCI express",
and the seller's invoice lists a: e206922 SATA/IDE, which I suspect
  is just the serial number.

How do I specify and buy a compatible CPU?

What about different voltage ranges for different CPUs?

== TIA.

Re: Compatible CPU down-grade? wrote:
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That part number, can't be right. The E206922 listed here,
is a ten year old board. Your physical description, sounds
like an LGA775 motherboard with PCI Express video slot,
which would be a lot more modern than this.


When the motherboard comes in, look all over it for part
numbers. "PC CHIPS" brand are the hardest to identify,
and some of them, have absolutely no numbers on the
motherboard at all. There used to be a site called
"PC Chips Lottery", where users would try to help one
another, identify the older motherboards.

This is why, when buying motherboards, you should *always*
locate a user manual before buying. If you cannot translate
the model number, into a download link to a manual, then
the motherboard isn't worth buying. Third-world or not.
An undocumented motherboard, is a useless motherboard.

There are a lot of different sockets on motherboards,
which is why using the motherboard model number information
to track down potential CPU solutions, is safer. Note that,
on the cheapest motherboards, some only have a 65W VCore
regulator, and will burn up if a 130W processor is installed.
Which is why, even if you identify the socket, further
information may be required, before installing a CPU.


Re: Compatible CPU down-grade?

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Well it's got to be old enough to have an IDE connector;
but it's even got a floppy conector.
I don't know the major daughter-card connectors.
It's got 2 of the common: 11+N pin connectors,
plus a 11+ (more than N) smaller-pitch connector,
 which has an extraction-lever.
 Is the video-IC hidden under the substantial heatsink?
 The only other LSI is a 'Winbond'. Is that sound?

Small white paint on rear: "94V-0 E206922 PS-1

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Is the "SOCKET-370" the CPU-socket description?

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Thanks for any feedback.

Re: Compatible CPU down-grade? wrote:

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IDE connectors can be added with a Jmicron chip. You
don't need to rely on the motherboard chipset for that.
My current motherboard, is probably around the same
vintage as your motherboard, and a Jmicron chip provides
the IDE. And does a very nice job as well (no compatibility
problems noted - all drives tested, worked, optical and HDD).

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That Winbond could be the SuperI/O chip. The SuperI/O includes functions
such as floppy connector. In terms of motherboard standard design,
Intel is gradually trying to remove the SuperI/O completely
from designs, by removing PS/2 connectors, RS232 serial ports,
Parallel Port, and floppy port. Very few SuperI/O functions are
needed on a non-legacy design now (hardware monitor for measuring
voltage, which nobody really cares about).

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I suspect the E206922 may be some kind of standards compliance
number, and be common to a number of motherboards. Notice that
the number was also used on a later motherboard. So I don't think that
functions as an identifier at all.

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Yes, Socket 370 was for Pentium III processors (single core) from
more than 10 years ago.

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In terms of adding IDE connectors to a motherboard, you can get PCI
cards to do that. This one uses an ITE 8212. This would allow
you to add IDE functions, to an existing computer.

And this card, is a PCI Express to IDE, with one IDE connector.
Uses a Jmicron JMB368. That might well fit in one of the "little"
slots on your motherboard.

And this one, uses a JMB363 as near as I can tell. That chip
supports 2 SATA ports plus 1 IDE ribbon cable port. You can
ignore the SATA portion and just use the IDE. The card has
four SATA ports, but only two SATA ports work at any one time.
Two sets of jumper blocks, forward the electrical signals to
either the on-card or the faceplate connector. The chip
doesn't have enough signals for all four SATA ports at
the same time. JMB363 chips are also a popular addition
to motherboard designs. But, with luck, you can find
a plug-in card with the same chip on it.

"VANTEC 4+1 SATA II 300 & PATA PCI-E Combo Model UGT-IS100R"

Using those kinds of cards, there's no need to get your
new motherboard working.

It's possible there are also plug-in cards around, with VIA tech
chips on them.

I have several Promise Ultra100 or Ultra133 cards, which are
PCI to IDE, and I added those cards to my older computers,
as an upgrade to the 66MB/sec IDE interfaces. But Promise
stopped making those cards years ago. At one time, when
there was still a Maxtor disk brand, there were retail
Maxtor disks for sale, where an Promise Ultra card was
bundled in the disk drive box. That's where one of my
IDE upgrade cards came from.

There's no need to build a separate computer for an
"IDE copy station", but you can if you want.


This is an LGA775 socket. The CPU has gold plated contacts
on the bottom, to mate to this connector.

Note, that the socket pins must be uniform, and all oriented the
same way. If the pins are snapped off, bent over, or
otherwise damaged, you should return the motherboard to
the seller as "damaged goods". In fact, when the motherboard
is under warranty with the manufacturer, they will not
accept a motherboard for repair, if the springs in the
socket are not in *perfect* condition. There is a "PnP cap"
that is supposed to fit over the socket when it is not
in use, to keep out dirt, and prevent things from
snagging the pins and snapping them off.

The LGA775 socket has a large percentage of power and ground
pins. If one of those pins is snapped off, the processor will
still run. Only if a "logic" signal gets snapped off, would
it cause an issue with the motherboard being able to start.

A video from Intel, archived on this site, shows how to
install and remove the CPU for LGA775. When you click this
link, you do a "Save as" and store the file on your disk.
Then, open the Windows video with Windows Media Player.
Sound starts at the 23 second mark - video is a bit over
seven minutes long. In Windows Media Player, you'll need
to set the zoom to 200%, to see the video clearly.

These are some examples of Celeron D processors for LGA775.

This one, has a TDP of 86 watts. Just to give you some
idea how much power it uses. Launch price was around $55 USD.

This older, slower one, uses 84 watts. And price was $33 USD
when new. Something like this should be pretty cheap on Ebay now.

But at this point, since we haven't positively identified
the motherboard model, it's hard to say what will work in
there. I like documentation, before I do anything, so
I don't make preventable errors.


Re: Compatible CPU down-grade?

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The importer confirmed that the pins are NOT vertical.

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Well even if I can get detailed specs, it seems that I can only
buy 'this weeks flavour'.

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I thought the PSU does all the regulation and not the MOBo !?

The 'socket' is marked as a GA775, and the 'importers'
say "they are no longer available".
These clowns operate like a bakery: selling only what's
in fashion today. And the MoBo supplier, who seems to
be a dealer of stolen goods, wants 250% of the importers
price for a low-priced new-socketed-Celeron.

You wrote that YOU can use an 'adaptor' for IDE.
Remember that conditions differ outside the US.


Re: Compatible CPU down-grade? wrote:
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This is the one I got. This converts an IDE motherboard, to
a SATA hard drive. The black connector on the front, goes
right into the SATA hard drive.

They make those adapters in SATA to IDE and IDE to SATA. By the
time I was interested in buying one, a "good brand" of
SATA motherboard to IDE drive adapter, was no longer available
in my country. So I never managed to get one. Some of those,
they don't work with ATAPI optical drives, and the one I had
my eye on, was good for both kinds of drives. (You need to
check customer reviews, to make sure you're not getting a dud.)

This is the one I wanted, for connecting SATA motherboards to IDE disks...
It's not shown on the Siig site any more. Sometimes, items like this
are missing the necessary power cable, for easy connection to your system.


( product link shortened)


As for buying an LGA775 processor, as long as you can get
a part number (like an SLxxx spec), you can look up the
processor on and get more info.


The motherboard does have a series of voltage regulators.

There is a regulator that converts 12V to VCore (around 1 volt or so).
That is a high current regulator. Some deliver 1 volt at around 100 amps.
It's kinda like an arc welder circuit, in the sense it's low voltage
and high current. The power supply makes the 12V, and the motherboard
is tasked with making a voltage suited to a particular family of
processors. The 12V can't be connected to the processor directly.

At one time, processors used as much as 3.3V, but the modern processors
are down around 1.0 V or so. (Even the GPU on the video card, runs the
core at around 1.0V or so.) And so the motherboard, needs a variable regulator,
to supply the processor. When the processor isn't busy, they can even turn
the voltage down a bit (Intel SpeedStep or AMD Cool N' Quiet).

The memory modules (DIMMs) have two regulators. One supplies Vdimm,
while a second lower current regulator controls the terminator voltage
(push-pull capable).

The chipset (Northbridge and Southbridge) have their own particular voltage
needs. Some of those chips, have as many as five different supply

Even the Ethernet chip on the motherboard, can have two voltage sources.
You could easily have six to eight separate circuits doing stuff like that.
Some of the less demanding circuits, are op-amp based and not as
expensive for the manufacturer to build.

If the power supply delivered all those voltages, the mainboard cable
would be twice as thick, and the power supply would be twice as expensive.

So yes, there's plenty of "voltage related stuff" on a motherboard.
And the power rating of the VCore circuit is important. There was
one generation of AMD motherboards for example, where weak
regulators were used, and motherboards could die in a week or two.
That isn't likely to happen with your Intel motherboard. Even when
they have a minimum number of phases, they can still power a
relatively high TDP processor. But, I like to check the
documentation, to be sure. I hate surprises.


Re: Compatible CPU down-grade?

On 09/02/2012 02:39 PM, wrote:
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Read the manual then get the cheapest CPU supported

Nope, you will not be able to use any non-supported CPU


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