Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <7304149d.0412030937.5c44d880@posting.google.com>,
mtmedlin@gmail.com (Mike M.) wrote:
> > There was a warning in this group a while ago, about the paper manual
> > that comes with the product. Download the manual and look at page 23
> > for the DSW information. Trying the settings from the PDF manual
> > may fix your problem.
> > That info doesn't affect your results. It could be, you've mixed up
> > the "ON" and "OFF" settings on the switch. You should go
> > by the "ON" and "OFF" status of each switch position, and match
> > the ON/OFF state shown in the manual, with the board.
> >
> > HTH,
> > Paul
>
>
> Thanks, Paul.
> Unfortunately, the 133 setting is the same on both versions. Plus, I
> had considered that perhaps I was mis-reading the switch position in
> the manual, so I tried the opposite pattern. That results in no boot.
> I can successfully set the DIP switches to 100mhz and that results in
> an 800 reading. And the memory is always correctly identifying itself
> as DDR226 on the POST screen.
> I've updated to v1006 BIOS. I've fiddled with the DIP switches. This
> mobo is in one of those Antec Aria cases, so things are really
> cramped. (It looked like everything was working, so I had completed
> the install of everything. It was only later I noticed it was
> reporting itself as a 1066mhz CPU.) I guess my next step is to pull
> out the CPU and put in a 2000+ 266 to see what sort of results it
> generates.
> I haven't run into this sort of problem since the old days when DIP
> switches were the norm for configuring a CPU on the old socket 7
> motherboards. It seems there's got to be an easy answer to this.
> I've scoured the manual (printed and online) looking for some other
> jumper or BIOS setting I may be missing, and nothing has worked so
> far.
> Further guesses or input are appreciated, though. I really don't want
> to have to disassemble this thing.
> --Mike
Another thought that occurs to me, is perhaps you bought a Mobile
Barton 2600 XP-M ? The default multiplier will be pretty low on
that.
See table entitled "Thoroughbred FSB:133" half way down the page:
http://fab51.com/cpu/barton/athlon-e23.html
You could be running at 133MHz and a 6X multiplier.
Since the A7V400-MX is using a DSW to set the frequency, it could
be that the board doesn't have programmable frequency/multiplier
control. That takes either some General Purpose I/O (GPIO) pins
or it takes an "overclock control chip", to set logic levels
on the multiplier signals of the socket. In any case, I don't see
any multiplier option settings in the BIOS for the board.
If it is a mobile version of processor, and you really want to
use it in that board, this page has some info on how to either
mod the bridges on the top of the chip itself, or to mod the
bottom of the processor socket. The bridges set logic levels
on some configuration pins on the bottom of the processor, and
a user may exert control, either by modding the bridges or
by changing the logic level at the bottom of the chip.
Originally, I had considered the bottom of the socket to be
the easier mod, but if the socket has no excess pin length
on it, it can be hard to attach wires to do the job. Using
"wire tricks" shoved into the socket holes is another option,
but I don't consider that to be too easy or reliable.
http://www.ocinside.de/go_e.html?/html/workshop/pinmod/amd_pinmod.html
If you pull down the "Multiplier Selection" menu, and select "16 x FSB",
that would give you 2133MHz when the DIP switch is set to 133MHz.
That is equivalent to a Thoroughbred 2600+ , but of course the
model number reported by any utility should say Barton, as the core
is likely a Barton core. (Actually, with a Barton core, the bus can
run at 200MHz, and I run my 2600+ XP-M at 200x11 or 2100MHz, which
is a pretty gentle overclock. Whether a setting like this will
work reliably, may depend on how much Vcore the chip is getting,
and if the board doesn't have a Vcore setting either, then that
would be another job for jumpering...)
The "jumpers" shown on the socket, on the ocinside web page, show
you what signals need to change, to get a different multiplier.
Settings like this are a convenient BIOS setting on other boards,
and microATX boards are notorious for not having necessary settings.
I put a table of values for AthlonXP here:
http://groups.google.ca/groups?selm=nospam-2811041527420001%40192.168.1.177
Hope that gives you a few hints,
Paul
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