Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <ab5ab6d0.0407020727.6c3cefbd@posting.google.com>,
henk_wieland@hotmail.com (Henk WIeland) wrote:
> nospam@needed.com (Paul) wrote in message
news:<nospam-0107041456320001@192.168.1.177>...
> > In article <cc170d$hfv$1@south.jnrs.ja.net>, "Rob Hemmings"
> > <SpamDaMan@nowhere.noway.con> wrote:
> >
> > > "Henk WIeland" <henk_wieland@hotmail.com> wrote in message
> > > news:ab5ab6d0.0407010340.2c33facf@posting.google.com...
> > > > Hi,
> > > >
> > > > I've read several postings with the same problem i'm having, but no
> > > > defintive solution.
> > > > System Failed CPU test message from speech reporter.
> > > > CPU is OK in other boards.
> > > > Some say there is a problem with the Power supply.
> > > > Others say there is problem with the AGP card.
> > > > I read messages about the weight of the cooler being a problem.
> > > >
> > > > The most likely cause wich i can't test is that i have no 4 pin 12V
> > > > connector on my PSU. Is this manadatory?
> > > >
> > > > Or is is it just another RMA case?
> > >
> > > I'd say the lack of a 4 pin connector (which supplies power
> > > to the CPU) is probably the cause. Without it, all the CPU
> > > current (P4s are quite power hungry) has to flow through the
> > > normal ATX power connector and then the mobo tracks.
> > > I've even heard of cases where the mobo ATX connector got
> > > so hot (without the 4 pin CPU power plug connected) that it
> > > literally melted, so it's possible that you have damaged the mobo
> > > I'd try RMAing it and get yourself a new P4-ready PSU anyway
> > > (they're not that expensive - just make sure it supplies at least 16A
> > > on the +12V line and is rated at 300W or (preferably) higher.)
> > > HTH
> >
> > Not to worry. The single +12V pin on the ATX20 pin connector is
> > not connected to the processor power circuit, so you cannot burn
> > it. There were a few motherboard designs that made that mistake,
> > but I think that is a thing of the past. The 2x2 ATX12V is the
> > sole source of power for the processor - if it is disconnected
> > then the processor gets no power at all.
> >
> > I measured the power flowing in the single +12V wire on the ATX20
> > pin connector on my system, and it measured 0.41A. I think that
> > is the current to run my Zalman 7000A fan.
> >
> > Your existing power supply probably doesn't have enough current
> > capability on the +12V to run your system. So, even if you made
> > an adapter, to go from two drive connectors to a 2x2 ATX12V
> > connector, the power supply would probably be overloaded on
> > +12V. A 15 or 16 amp limit on the power supply +12V output is
> > enough for a basic computer system with high end P4. With
> > Prescott, you may want a little bit more. Similarly, if you
> > have a lot of disk drives.
> >
> > HTH,
> > Paul
>
> Ok guys thx for the input.
> So it is mandatory?
> Then i will go out and buy myself a new PSU.
> But i will need i really quiet one. Any recommandations?
> Not to expensive ofcourse (i am Dutch you know ;-)).
>
> rgds,
> Henk
As the 2x2 ATX12V connector is the only way for the processor to
get power, it is mandatory.
Antec, Enermax, Fortron/Sparkle, Seasonic are a few names.
Availability of power supplies varies from country to country,
so you may have a different set of choices than the rest of us.
Tomshardware has had a few reviews of power supplies, and that
may give you some ideas of which ones are good and bad.
Check the "how-to" section of Toms. I found these via the article
search engine on the web page, using search term "power supplies".
http://www.tomshardware.com/howto/20030609/index.html
http://www.tomshardware.com/howto/20040122/index.html
http://www.tomshardware.com/howto/20021021/index.html
This one has a good efficiency rating - FSP400-60PFN :
http://www6.tomshardware.com/howto/20030609/power_supplies-10.html
With any power supply, don't buy them by total power alone.
Make sure they can supply at least 15 amps on the +12V output,
for a P4 or an Athlon64 board. (The K8V boards use that 2x2
connector also.)
HTH,
Paul
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