Psu/mobo atx connectors

  • Thread starter Thread starter Ed Mc
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Ed Mc

Hi,
I'm building a Asrock 890gx Ext.4 mobo computer with a Cooler Master
Silent Pro 600 psu. The board has an 8 pin atx12v1 connector with half
of it covered by tape. The psu has 2 separate 4 pin connectors.
Question 1: do I hook the 2 separate connectors to the single 8 pin on
the mobo?
The psu, likewise, has a 20 pin and another 4 pin atxpwr connectors.
Question 2: do I plug both into the 24 pin atxpwr connector on the
mobo, or alternatively, just the use the 20 pin psu connector? Thanks
for help. This is my first custom build and I will be using an AMD
Phenom 1055t cpu.
 
Hi,
I'm building a Asrock 890gx Ext.4 mobo computer with a Cooler Master
Silent Pro 600 psu. The board has an 8 pin atx12v1 connector with half
of it covered by tape. The psu has 2 separate 4 pin connectors. Question
1: do I hook the 2 separate connectors to the single 8 pin on the mobo?
The psu, likewise, has a 20 pin and another 4 pin atxpwr connectors.
Question 2: do I plug both into the 24 pin atxpwr connector on the mobo,
or alternatively, just the use the 20 pin psu connector? Thanks for
help. This is my first custom build and I will be using an AMD Phenom
1055t cpu.
Click to expand...

It is the motherboard that determines which connectors you need and use.
The power supply is set up to anticipate any motherboard configuration.

Yes- Coolermaster CPU 4+4 pin connector goes into the 8 pin CPU slot on
the MB.

Coolermaster 20+4 pin connector goes into the 24 pin motherboard slot.

The plugs only insert easily one way so you just need to pay attention
to the shapes of the plug and socket.
 
It is the motherboard that determines which connectors you need and
use. The power supply is set up to anticipate any motherboard
configuration.

Yes- Coolermaster CPU 4+4 pin connector goes into the 8 pin CPU slot
on the MB.

Coolermaster 20+4 pin connector goes into the 24 pin motherboard slot.

The plugs only insert easily one way so you just need to pay attention
to the shapes of the plug and socket.
Click to expand...

Thanks for reply TVeblen. I just noticed the 20 pin connector on the
Silent Pro 600 psu only has 19 little receptors for the 20 pins in the
mobo atxpwr connector. One hole has no wire going into it at all. Is
this a defect or is it supposed to be this way? Thanks again.
 
TVeblen said:
It's OK. Pin 20 is blank on the 24 connector.
See Here: http://www.hardwarebook.info/ATX_v2.2_Power_Supply
Click to expand...

The missing pin, corresponds to where -5V used to go. Motherboards
no longer use -5V, so they remove that wire.

There are a few middle aged motherboards, that for unexplained
reasons, use -5V. Maybe drawing only a tiny bit of current from
it. If you have to replace the power supply on an older system with
one of those motherboards, you're left to guess whether it might need
-5V or not. It can be hard to find a power supply, designed to
the older standard, where the -5V pin is present.

Paul
 
The missing pin, corresponds to where -5V used to go. Motherboards
no longer use -5V, so they remove that wire.

There are a few middle aged motherboards, that for unexplained
reasons, use -5V. Maybe drawing only a tiny bit of current from
it. If you have to replace the power supply on an older system with
one of those motherboards, you're left to guess whether it might need
-5V or not. It can be hard to find a power supply, designed to
the older standard, where the -5V pin is present.

Paul
Click to expand...

So Paul, what would be the symptoms of a "middle-aged" motherboard that
was running on a modern power supply w/o -5v power? Would it boot? Or
would there be more confusing symptoms?
 
So Paul, what would be the symptoms of a "middle-aged" motherboard that
was running on a modern power supply w/o -5v power? Would it boot? Or
would there be more confusing symptoms?
Click to expand...

When I hit the situation it wouldn't even try to post.
 
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