Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1313
  • Last Modified:

ATX Front Panel Connector -What is Pin-9 5-volts?

This deals with the Front Panel Connector
Intel DZ68DB motherboard..
CM Storm case

Connector on motherboard has 9 pins. I understand the connections from the case to pins 1-8. Those handle HD LED, reset switch, Power LED, an on/off switch.

But what is pin-9? It says Power 5 volts. What connects to pin-9? Is it a lead from the power supply? From the case? I don't see anything coming from the case. Seems like it should be simple, but I'm stumped. Thanks.
3 Solutions
According to this, it is Not Connected. (cursor over #7)


I haven't seen a 5v line used in a long time. And if I remember correctly, it was used to run a front panel "display".

If you have a voltmeter handy, you can check if it does have 5v coming out of it.
I'm kind of curious.   : )
Interesting question

Front Panel I/O document  http://www.formfactors.org/developer/specs/A2928604-005.pdf and on page 18 describes the pin as reserved but it looks like that 5 volts is available there.

Page 44 of the manual for the motherboard http://downloadmirror.intel.com/19926/eng/DZ68DB_ProductGuide01_English.pdf show that there is +5 volts there.  See the box labelled G.  Also see Page 47.

You don't supply the voltage.  It comes from the motherboard and is available for some device.
Gary CaseRetiredCommented:
"... I haven't seen a 5v line used in a long time ..."  ==>  Actually 5v is one of the main rails on your power supply and is used by a lot of devices in modern PCs.   -5v is a different story ... that's essentially obsolete (not even provided on many new PSUs) ... but that's not what that pin provides.

Nevertheless, as noted above, the +5v on pin=9 is simply "there" for the taking -- but most chassis setups don't have any need for it, so there won't be any connection to it.    It's simply provided so there's a convenient source of +5v if needed for your specific chassis -- it could drive an LED; be used for a CFL display panel; etc.

... but I see nothing in the CM Storm manual that would require this pin.
Enhanced Intelligibility Without Cable Clutter

Challenge: The ESA office in Brussels wanted a reliable audio conference system for video conferences. Their requirement - No participant must be left out from the conference and the audio quality must not be compromised.

>> Actually 5v is one of the main rails on your power supply...

Sloppy reply on my part.
I meant something run off voltage from the front panel header.   {sheepish grin}
Elliot123Author Commented:
Well, I assembled the computer with nothing on pin-9 and it works fine.  I wasn't sure about the pin, and the 5 volts concerned me. So I thank you folks for the advice.
Thanks for the feedback and the Points.    : )

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now