motherboard backplate prongs

[tomatohead]

i just got a new EpoX board, but i figured you guys here in asus may
can help.

these prongs on the backplate of the case ...
are you supposed to violently bend these suckers so they go "inside"
the case, and sort of "grip" each i/o port ?

or are they just supposed to liesurely make contact with the i/o port,
and act
more like a spring ?

i never have figured this out.

they dont really seem like they could bend all the way in to "grip"
them,
but i tried my best on my last board and i think i screwed up !

cheers,
e

 

[Simon Yee]

shield and spring load to prevent the port from being broken

--
From Simon Yee

Micro Mega Computer Centre Sdn. Bhd.
603-21636220
016-3950087
Office1

 

[Christopher Pollard]

are you supposed to violently bend these suckers so they go "inside"
the case, and sort of "grip" each i/o port ?
No

or are they just supposed to liesurely make contact with the i/o port,
and act
more like a spring ?

Yes.

They're for electrical screening, not physical strength.
You shouldn't have to do anything violently when building a PC...



Chris Pollard

 

[Paul]

i just got a new EpoX board, but i figured you guys here in asus may
can help.

these prongs on the backplate of the case ...
are you supposed to violently bend these suckers so they go "inside"
the case, and sort of "grip" each i/o port ?

or are they just supposed to liesurely make contact with the i/o port,
and act
more like a spring ?

i never have figured this out.

they dont really seem like they could bend all the way in to "grip"
them,
but i tried my best on my last board and i think i screwed up !

cheers,
e

When you place your motherboard in its case, you press the motherboard
against the back plate, while tightening the screws into the standoffs.
The "prongs" are ground contacts, and they are meant to make electrical
connections with the back plate and the case.

The purpose for grounding the case is to control electromagnetic
interference (EMI). But, all the theory I know, the typical PC case
would leak emissions like a sieve. That is why control at the printed
circuit board level is so important in the PC. Putting a copper ground
plane over the signal conductors on a board, will help contain the
emissions. Adding filter components to the signals that go to the
I/O connectors, helps reduce the "antenna" effect that each cable
plugged into the computer becomes. (That is why some video cards
are blurry at high resolution - the filters that control EMI, also
degrade the video quality.)

My current computer leaks emissions via the power cord. These are
called "conducted emissions" and are supposed to be filtered by
components in the power supply. The power cord functions as an
antenna, for any electrical noise that comes backward out of the
power supply and into my wall socket. The following component is
supposed to be inside your power supply -

http://www.corcom.com/pdf/rfi/N Series.PDF

So, just compress the springs against the I/O plate and tighten
up the standoff screws.

HTH,
Paul

 

[Andreas Schuerger]

Christopher Pollard typed:

You shouldn't have to do anything violently when building a PC...

Unless ... you have to fit a Intel Boxed or Verax Fan/Heatsink Combo,
that is *SCNR*

 

[tomatohead]

thanks everybody.
%^)

 

[Christopher Pollard]

The following component is
supposed to be inside your power supply -

Hmm, and make sure your computer is earthed...
Mine isn't, and I get a tingle whenever I touch the case. The other day, I was
connecting my digital camera, but as I wsa sitting on my chair, I was insulated.

My (barefooted) daughter came up to me and toughed my bare leg, completing the
circuit...



Chris Pollard