Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <MPG.1c5a7672d566759a989684@nntp.broadband.rogers.com>, Jiggy
<NO_newsgroupsurfer_SPAM@coldmail.com> wrote:
> just wanted to know if anyone has tried the above mentioned board with a
> faster cpu then the ones ASus list on their site ? They say PCB 1.08 can
> run much faster cpus as opposed to the PCB 1.06 which is the one I've
> got. Thanks.
If you go to processorfinder.intel.com and select "Intel Celeron
Processors", you'll get a whole list of stuff.
Now, use the filter pulldown and select "370 pin PPGA" from the
"package type" menu. Click "filter on selections".
I think you'll find a correlation between the listed speeds and the
PPGA package. The list for PPGA Celerons stops at 533MHz, implying that
the non-1.08 boards take PPGA type processors and no others. The
1.08 board appears to support FC-PGA type processors (maybe those
are Coppermine ? not sure) as well as the PPGA. At least that is
how I interpret the table on the Asus "cpusupport" web page:
http://www.asus.com.tw/support/cpusupport/cpusupport.aspx
I've copied a few entries here from the page for "mew".
The Asus list has two 533MHz entries, and I would bet the
533A entry corresponds to the SL46S in this partial list.
sSpec# CPU Speed Bus Speed Tech Stepping Cache Package Type
SL3FZ 533.00 MHz 66 MHz 0.25u mB0 128 KB PPGA
SL46S 533.00 MHz 66 MHz 0.18u cB0 128 KB FC-PGA
SL3PZ 533.00 MHz 66 MHz 0.25u mB0 128 KB 370 pin PPGA PPGA2
There are small differences in the functions of some of
the pins on the bottom of PPGA, Coppermine, and Tualatin
processors. In some cases, people have done socket mods,
to make processors that wouldn't normally work, into working
specimens. Perhaps you'll get lucky, and find a recipe
somewhere, for converting a PPGA motherboard into an
FCPGA motherboard.
One limiting factor, is the Vcore conversion circuit on the
motherboard, may or may not deliver a low enough voltage
for the newer processors. I think the PPGA takes 2.0V, the
Coppermine could be 1.65V or so, and the Tualatin is 1.5V.
For example, I tried the following terms on
http://groups.google.ca
including the double quotes:
ppga fcpga "socket mod"
and found this single thread:
http://groups.google.ca/groups?threadm=fcfepucuti4nsv8qnc4kcl08jtqejaiuek%404ax.com
That thread references:
http://www.3feetunder.com/krick/370mod/
http://www4.tomshardware.com/cpu/00q1/000229/index.html
a "neo370" converter
as possible solutions.
Here is some info on "neo370" - this may no longer be available
from Powerleap, so you may need to try Ebay or something:
http://web.archive.org/web/20010602074830/www.powerleap.com/Products/neo.htm
It is still listed on the Powerleap site, and the socket plus
special heatsink/fan (clip is longer, to accomodate the additional
thickness of the socket) is $25. You will need to find a
Copermine FCPGA processor somewhere, to be able to use this.
http://www.powerleap.com/NeoS370.html
If you try the powerleap site itself, and their compatibility
database:
http://www.powerleap.com/SystemSearch.html
they even suggest a PL-Neo/T and a 1200MHz processor for $189
(that is a Tualatin processor). I hope the BIOS on the MEW can
handle a processor like that.
So, you will need to do more research into converting a PPGA
motherboard, into one suitable for other kinds of processors
like S370 Coppermine FCPGA and Tualatin FCPGA2 processors. Be
careful to research what previous experimenters report about
the MEW BIOS, as while the socket can be hacked or modified,
sometimes the level of support in the BIOS is the limiting
issue.
Issues:
1) Suitability of Vcore voltage regulator, for voltages less
than 2.0V.
2) Adapter to modify necessary pins.
3) Heatsink/fan with longer clip, to fit over top of the adapter.
4) BIOS version known to handle fast processors. Some Asus
BIOS used to have trouble with certain multiplier values.
Info on this issue can be hard to find.
Should be a challenging project,
Paul
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