Re: Asus A8N-SLI Premium - New Build

On 2 Apr 2006 01:10:44 -0800, pjolliffe@xxxxxxxxx wrote:

Hi John,

I've checked the power supply for the +12 volts output, turned out this
has a minimum current of 1A and a maximum of 15A. This is well under
the 20A that you have suggested.

Do you think this is the problem?


Considering your problem description with the 4-pin connector, it is
95% certain to be an inadequate power-supply.

However since the system is only staying up for 2 seconds, putting a
voltmeter on the +12V supply is fruitless. By the time you get a
reading the load will have been removed by the shut-down and the
12V will be fine, or more-likely the power-supply will have shut down
completely, triggered by its internal overload-protection circuits.
A digital oscilloscope on the +12V would tell you whether it sagged
into current-limit before either the system quit or the power-supply
saw the overload and shut itself down.

Chicken and egg without a professional tooling or a correctly-rated
power-supply to borrow or by "sale or return".

The reason I opted for this power supply was for the 'silent' factor.
Would you have any recommendations for a similar but well powered unit?


The Enermax Whisper V2.x series has a couple of fans but is very quiet
and you can control the speed of one of the fans manually. Far quieter
than the fan on the CPU heat-sink, (even if you go with the large-fan
slow-speed variety like Zalman 7700 ( if it fits...).

Dual +12V @ 15amps each leg with a combined max of 26amps
would be just fine if you never ever intend to use a second
high-power video card. Better is dual +12V 18amps with 32 amps
combined, certainly if you ever want to run a second 7800GT. Don't
worry about the other output currents on any of the reputable ATXv2.x
power-supplies-- you will have plenty.

John Lewis
.