Replcing an old P4 1.4 processor with an old P4 2.0 processor???

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Specs for the Intel D850GB Mother board say it will support P4 2.0 400 HZ 256
K L2 Cache max. There's lot's of these on E-Bay but they all have 500 K L2
Cache. Does anybody know if this will be a problem??? the intel manual says
use only supported processors, but then comes back with "All supported
onboard memory can be cached up to the cachability limit of the processor.
see the processors data sheet for cachability limits" I'm thinking this
statement says size of L2 cache is not a problem??? This is an older computer
purchased in May of 2001 when they probably didn't even have 500 K L2 cache.
 
Bodidleysquat said:
Specs for the Intel D850GB Mother board say it will support P4 2.0 400 HZ 256
K L2 Cache max. There's lot's of these on E-Bay but they all have 500 K L2
Cache. Does anybody know if this will be a problem??? the intel manual says
use only supported processors, but then comes back with "All supported
onboard memory can be cached up to the cachability limit of the processor.
see the processors data sheet for cachability limits" I'm thinking this
statement says size of L2 cache is not a problem??? This is an older computer
purchased in May of 2001 when they probably didn't even have 500 K L2 cache.
Click to expand...

Although Intel processors from any given time period may look the same,
it does not necessarily mean that they are compatible. More information
is needed about the processors, specifically their sSpec#. A little bit
of research will tell more about them or whether or not one can be used
as a replacement for the other. Re-post with the data that is burned by
laser into the surfaces of the processors (but most importantly, the
sSpec#).
 
Bodidleysquat said:
Specs for the Intel D850GB Mother board say it will support P4 2.0 400 HZ 256
K L2 Cache max. There's lot's of these on E-Bay but they all have 500 K L2
Cache. Does anybody know if this will be a problem??? the intel manual says
use only supported processors, but then comes back with "All supported
onboard memory can be cached up to the cachability limit of the processor.
see the processors data sheet for cachability limits" I'm thinking this
statement says size of L2 cache is not a problem??? This is an older computer
purchased in May of 2001 when they probably didn't even have 500 K L2 cache.
Click to expand...

In that time frame Intel had two different series of processors with
overlapping speeds. What you need to find out is what socket your
motherboard uses and what socket the processor is made for. You can not
use a chip made for one socket on a motherboard with a different socket
without an adapter.
 
GHalleck said:
Although Intel processors from any given time period may look the same,
it does not necessarily mean that they are compatible. More information
is needed about the processors, specifically their sSpec#. A little bit
of research will tell more about them or whether or not one can be used
as a replacement for the other. Re-post with the data that is burned by
laser into the surfaces of the processors (but most importantly, the
sSpec#).
Thanks Halleck, after more intense research, I discovered my computer is the origional 423 pin socket family. I have the origional 1.4 and there was one 423 pin 2.0 on e-bay and the bid was $66.00 for a defunct processor. I mean you can get a barebones do it yourselfer Core 2 Duo Quad Core with an Intel MB for $500 at Tigerdirect.
Click to expand...
 
Bodidleysquat said:
Specs for the Intel D850GB Mother board say it will support P4 2.0 400 HZ 256
K L2 Cache max. There's lot's of these on E-Bay but they all have 500 K L2
Cache. Does anybody know if this will be a problem??? the intel manual says
use only supported processors, but then comes back with "All supported
onboard memory can be cached up to the cachability limit of the processor.
see the processors data sheet for cachability limits" I'm thinking this
statement says size of L2 cache is not a problem??? This is an older computer
purchased in May of 2001 when they probably didn't even have 500 K L2 cache.
Click to expand...

The following auction:
http://cgi.ebay.com/Pentium-4-P4-2-...ryZ14293QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
has the 256 K caches. It is a 423 pin CPU and I think the newer ones
used a 478 pin CPU and included 512 K of cache. Of course there are
more of the newer CPUs available and they are much cheaper.
 
Michael said:
The following auction:
http://cgi.ebay.com/Pentium-4-P4-2-...ryZ14293QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

has the 256 K caches. It is a 423 pin CPU and I think the newer ones
used a 478 pin CPU and included 512 K of cache. Of course there are
more of the newer CPUs available and they are much cheaper.
Click to expand...

The manual says it is a socket 423 motherboard.

http://download.intel.com/support/motherboards/desktop/d850gb/A2608002.pdf

Supported processor list is here.

http://developer.intel.com/support/motherboards/desktop/d850gb/sb/cs-013248.htm

Pentium 4 processors are listed here. If you set the package type to "423 pins"
and "Filter on Selection", only the S423 processors will be listed.

http://processorfinder.intel.com/List.aspx?ProcFam=483

This is the top of the line (2GHz) processor from that reduced list of products.
It runs at 1.75V and has a 256KB cache. It is based on 0.18u technology (Willamette ?).
The L2 cache works over the whole 4GB space.

http://processorfinder.intel.com/details.aspx?sSpec=SL5TQ

http://en.wikipedia.org/wiki/Pentium_4#Willamette

There are adapters that can plug into the S423 socket and allow
the use of S478 processors. Doing so, means the mechanical details of
fitting a CPU cooler will be adversely affected. But the Intel BIOS would
need microcode support and recognition code, for such a different set of
processors. (There are ways to check the microcode, by taking the BIOS
modules apart. I'm not sure whether the available tools work with Intel
BIOS or not.)

As long as the Vcore regulator has sufficient current, and delivers
1.5V for a S478 processor, there is the potential to use such solutions.

http://www.powerleap.com/PL-P4N.jsp

http://www.powerleap.com/SystemSearch.html (Compatibility checker)

The compatibility checker returns this. Presumably the P18 BIOS has whatever
microcode support Powerleap feels is necessary.

"Note: Must use Intel P18 bios."
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=N&ProductID=486&DwnldID=4559

By searching, using both D850GB and PL-P4N as search terms, you can get
some idea how well it worked. The individual here, may not have installed
the P18 BIOS. But there have been issues before, where the BIOS level
Powerleap specify, is not enough, on some of their other products. Compatibility
feedback in some cases, came from end users back to Powerleap. And that is
how they figured out whether some product combinations worked (as testing
thousands of test cases would be out of the question, for their upgrade
products). They used to have a database with the reports from customers listed.

http://www.resellerratings.com/forum/archive/index.php/t-61736.html

"I bought a PL/P4N adapter that allows you to use any 400 FSB pentium 4,
478 pin processor on an older pentium 4, 423 pin board. I installed it
into my friend's Intel D850GB motherboard with a pentium 4 2.0A computer.
I got nothing but a black screen! I am sending it back and requesting a
new one. Is it a waste of my time or has enyone had luck with the PL/P4N?
The D850GB board is listed on the powerleap site as being compatible!"

HTH,
Paul
 
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