Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <c4g9u6$jkn$1@nic.grnet.gr>, Toussis Manolis
<koppermind@panafonet.gr> wrote:
> Paul wrote:
>
> > In article <c4fjqk$91m$1@nic.grnet.gr>, Toussis Manolis
> > <koppermind@panafonet.gr> wrote:
> >
> >> Greetings,
> >>
> >> I have a problem with an asus cuv4x-d dual cpu motherboard.... The
> >> motherboard has latest BIOS 1.016
> >> I plug in 2 cpus ( PIII 866/133 256K coppermine) and only the cpu#2 is
> >> shown up.
> >> both cpus are tested on another motherboard and run ok.
> >> cpu#1 : none
> >> cpu#2 : *PIII 866 ......
> >> PIII 866/133 is supported by the motherboard....
> >>
> >> The strange thing is that the pc with only the second cpu enabled runs
> >> rock solid in linux in hard usage without any problem but only with the
> >> second cpu....
> >> I cannot find out what to do....
> >> Waiting for your help....
> >
> > I see some posts in Google about reducing the FSB from 133MHz to
> > 124MHz. Maybe that will help the dual configuration.
> >
> > If could also be that the two CPU sockets are not powered by the
> > same voltage regulator. In one Google post, they mention that a
> > HIP6021 is one of the regulator chips, which is capable of voltages
> > as low as 1.3V. That should be good for just about any processor
> > you install on the board. I see a smaller (20 pin?) chip to the
> > right of the ATX 20 pin connector, and that could be a second
> > voltage regulator chip. If both voltage regulators don't support
> > voltages less than 1.8V, then your 1.7V or so processors might not
> > both boot. (If you can read the part numbers off the two voltage
> > regulator chips, and post them here, we can look up the characteristics
> > of the chips for you. The voltage needs of your processor can be
> > looked up by entering the 5 character SSPEC number on the
> >
http://processorfinder.intel.com web page.)
> >
> > I would try the FSB change first, just to see if that will work.
> >
> > The HIP6021 is here:
> >
http://www.intersil.com/data/fn/fn4/fn4684/FN4684.pdf
> >
> > HTH,
> > Paul
>
> I have tried many processor fsb ( and 124) but didn't worked.
>
> the two regulators are:
> big chip HIP6021ACB
> little chip (on the right) HIP6004BCB
>
> I don't think it is a regulator problem because even if there is a N/A in
> the BIOS monitor in vcore1... I get a 1.70 voltage in vcore1/vcore2 reading
> it from both linux (lm_sensors) / windows (sandra). Is the power supply
> suspicious for the problem? Should I buy another ATX power?
>
> thanks for your post....
http://www.intersil.com/products/deviceinfo.asp?pn=HIP6021
says "1.3VDC to 2.05VDC in 0.05V steps and from 2.1VDC to 3.5VDC in 0.1V",
which will handle anything.
http://www.intersil.com/products/deviceinfo.asp?pn=HIP6004B
has the same rating as the HIP6021, so no problem there.
The only other thing that comes to mind, is maybe the circuit is
overloaded or damaged. How do the capacitors look ? Are they bulging
on the top, or is there a brown stain from what looks like a fluid
that leaked out of the capacitors ?
I don't think any other jumpers or settings are needed to get a
second processor to work...
If your ATX power supply had a problem, then either both processors
would work, or both processors would fail. An ATX supply fault
should not be able to make one fail and one work. Save your money
for now.
The HIP6021 would seem to be OK, because it supplies the AGP
voltage, as well as powering one processor. So, something is up
with the 6004.
Is the second processor well seated ? If somehow a VID code of
11111 is sent to a regulator, it will disable its output.
That can happen if there is no processor in the socket or if
the processor VID pins aren't seated.
At least one user here, bought a board second hand, and the
previous owner left a "wire trick" in the socket. Check the
socket carefully, to see if someone has been attempting to
modify the board.
Paul
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