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grounding a mobo??

S

slickmitch

Gawd
Joined
Feb 8, 2005
Messages
548
Was wondering what all needs to be grounded on a motherboard.I got a small rack with a piece of equipment that was shipped to me. The rack was just protective measures for shipping but the rack is to nice to throw away( a nice 300$ Middle Atlantic rack) and perfect for a modOrama weekend. I am mounting a mobo to a 5 space rack shelf by marking and tapping the stand off screws. I am pretty sure this is what grounds a mobo in a case but want to make sure. Does the I/O shield ground anything? Any input would be appreciated so I can start my work this weekend.
 
Usually the mobo is grounded using the 24pin cable, and the little silver rings around the screw holes.
 
Actually, I believe the motherboard is grounded ONLY by the power supply cable. If you look at the holes where the standoff screws sit, that silver ring is more of a reinforcement than a grounding material. Consider a plastic case........since the plastic doesn't support a current, the only way you'd ground the mobo is with the power supply connection, right? :)

The I/O shield doesn't ground anything, except maybe the connectors in the back of the mobo, as far as I know. That's why, when I work on a computer, instead of unplugging the power supply, I turn it off......that maintains the ground, if I'm right, without allowing current to pass to the motherboard. :cool:
 
Thanks a lot just wanted to be sure before I fabricate a mobo tray. I see what your saying about the stand offs. Even in a metal case the case isn't grounded at all, so how could the stand offs be. Thanks again.
 
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