ASUS P5GD1-VM

[Joseph Mouhanna]

Here's what I posted on the Asus Web site using their technical inquiry
form. Does anyone have experience on how fast they respond?

-----------------------------------------------------------------



I just bought an ASUS P5GD1-VM-UAY0Z motherboard as part of a new system
build. I installed it in the case, and installed a new 500 Watts (Antec) 24
pin power supply (parts list attached below).



When I power the system up, it starts the boot sequence and then shuts down
about 30 seconds later. If I press the Del key to enter setup, I see the
following:



American Megatrends

ASUS P5GD1-VM ACPI BIOS Revision 1003

CPU: Intel (R) Pentium (R) 4 CPU 3.00GHz

Speed: 3.00 GHz



Entering Setup ...

Press F8 for BBS POPUP

PC-3200 Dual Channel Interleaved

Checking NVRAM..

Initializing USB Controllers .. Done

1016MB OK

US Devices(s): 1 Mouse



And then the system shuts down. What causes the system to shut down? I
disconnected everything, except for the motherboard (and took out the one
add-in PCI card), but this still happens.



Equipment list:



Asus P5GD1-VM



Seagate Barracuda 7200.7 ST3120026AS 120GB Serial ATA 7200RPM Hard Drive



GeIL GE1G3200BDC 1GB Kit DDR400 PC3200 Dual Channel Value Series Memory



Intel Pentium® 4 530 Processor Prescott 3.0GHz, 800MHz FSB, Socket 775, 1MB
Cache Openbox



Sony DVD W/R drive



Mitsumi 7-in-1 Internal USB 2.0 Media Drive



Zonet ZUC2400 USB2.0 + Firewire PCI Combo Card Retail


CASE RAIDMAX ATX-868WSP SLV 420W

 

[Paul]

Here's what I posted on the Asus Web site using their technical inquiry
form. Does anyone have experience on how fast they respond?

-----------------------------------------------------------------
I just bought an ASUS P5GD1-VM-UAY0Z motherboard as part of a new system
build. I installed it in the case, and installed a new 500 Watts (Antec) 24
pin power supply (parts list attached below).

When I power the system up, it starts the boot sequence and then shuts down
about 30 seconds later. If I press the Del key to enter setup, I see the
following:

American Megatrends

ASUS P5GD1-VM ACPI BIOS Revision 1003
CPU: Intel (R) Pentium (R) 4 CPU 3.00GHz
Speed: 3.00 GHz

Entering Setup ...
Press F8 for BBS POPUP
PC-3200 Dual Channel Interleaved
Checking NVRAM..
Initializing USB Controllers .. Done
1016MB OK
US Devices(s): 1 Mouse

And then the system shuts down. What causes the system to shut down? I
disconnected everything, except for the motherboard (and took out the one
add-in PCI card), but this still happens.

Equipment list:

Asus P5GD1-VM
Seagate Barracuda 7200.7 ST3120026AS 120GB Serial ATA 7200RPM Hard Drive
GeIL GE1G3200BDC 1GB Kit DDR400 PC3200 Dual Channel Value Series Memory
Intel Pentium® 4 530 Processor Prescott 3.0GHz, 800MHz FSB, Socket 775, 1MB
Cache Openbox
Sony DVD W/R drive
Mitsumi 7-in-1 Internal USB 2.0 Media Drive
Zonet ZUC2400 USB2.0 + Firewire PCI Combo Card Retail
CASE RAIDMAX ATX-868WSP SLV 420W

What does the label on the PSU say ? I cannot find a spec for a 420W
supply on the buyraidmax.com web site. It could be the +12V is too
weak. 11 or 12 amps minimum, 15 amps gives some margin for a basic
system.

Reasons for shutdown on a system are pretty limited. The processor
has overheat detection, in two stages, the first stage being
throttling of the instruction rate, to reduce heat. The second
stage is a signal activated when the chip hits 135C? That should
be connected to the power path, and kill the supply.

Reasons for PSU to shut down:
1) Some BIOS do this if no CPU fan is detected.
2) AGP_Warn circuit detects illegal video card (gates power off)
You are a -VM, so this is not likely without a video card
3) Thermtrip from CPU itself.
4) Four seconds contact of power button on front of case.
5) Firmware based restart policy enforcement (within the first
second of operation). After a power failure, the BIOS starts up,
and checks the BIOS setting, to see if the user wants the computer
to automatically restart after a power failure or not. If not,
computer shuts off. Some chipsets have direct hardware support
for this function, and don't need to implement this as a firmware
based feature.

If +5VSB becomes overloaded (and it is generally only good for 2amps),
that will kill all output, as +5VSB is part of the control circuit
in the PSU.

A PSU will also shut down on its own internal thermal limit, or it
could do this if overcurrent/overvoltage is detected. Most PSUs are
so poorly constructed, that these are hardly likely to be the source
of a shutdown. Loss of +5VSB is more likely to be the cause of the
PSU shutting down. (I.e. Look at the green LED on the motherboard
and see if it winks off just before the computer shuts down. The
green LED on the motherboard is powered by +5VSB.) The overcurrent
trip point is generally set so high, that wires would melt before
the PSU responded. The overvoltage feature is similarly useless,
and circuitry would be damaged before an overvoltage feature would
do something. The reason for this, is the tolerances on protection
circuits are sloppy, so the thresholds have to be set high to
prevent nuisance trips of the protection circuits.

24 pin ATX power ? Shouldn't matter, as you haven't mentioned any
PCI Express cards or other heavy loads. 20 pin should be good
enough. If Asus are smart, the processor current comes through the
ATX 2x2 12V connector, whereas the 24 pin connector should only be
used to power fans and any cards which use +12V (shouldn't
really be any - video cards tend to use their Aux connector
for this).

CPU Fan controller jumper ? Set to "PWM" by default. Check that
fan is spinning when system starts. Q-fan is disabled by default
in the BIOS, which should allow the fan to spin at the max
speed that the Intel fan controller allows. The Intel fan controller,
even on the new processors, is still controlled by the air
temp passing through the fan.

The BIOS has an option to enable or disable thermal protection
on the CPU, but as you cannot get into the BIOS, you cannot
change this. It would be helpful to get into the BIOS hardware
monitor page and check the listed temperatures.

If I had to guess, I'd say the CPU fan, or the way the
heatsink is installed, is the most likely cause. Followed by
the PSU, if the current limits on the label say the PSU is a
dog.

HTH,
Paul

 

[Joseph Mouhanna]

The PSU has plenty of amps. The problem turned out to be far simpler than
that. The new 775 style socket requires a fan that "clicks" into place using
four legs. One of the legs did not fit right into its MB hole. I rotated the
fan, and it all legs clicked into place properly. That did it. Intel needs
to improve the design, as visual inspection does not give a clue that a
problem exists.