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Thread: Dell Optiplex GX270 Front-Panel Pinout

  1. #1
    Low Bitrate blackmz3's Avatar
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    Dell Optiplex GX270 Front-Panel Pinout

    I'm not sure if this belongs here but I'm using this computer without the case so I had to find out where the power switch was located on the mobo. After a bit of searching, I found a site with some of the pinouts listed.

    http://www.motherboardpoint.com/show...60&postcount=9

    I just finished figuring out how to do this, and I rang out a bunch more of the wiring than was previously posted.

    here's a diagram of the connector on the motherboard:

    33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1
    o o o o o o x o o o o o o o o o o
    o o o o o o o o o o o o o o o o o
    34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2

    The 34-pin ribbon cable runs to a small sub-board for the front panel, which includes a 16-pin(2x8) header which gets another ribbon cable that goes to the "sub-sub-baord" for the actual poanel light and switches.

    The table below shows the functions of the pins on the 34-pin connector, plus where they connect to on the 16-pin "sub-board" header.

    34-Pin function 16-Pin
    1 GND 3, 7, 15, 16
    2 ?
    3 ?
    4 ?
    5 ?
    6 ?
    7 ?
    8 ?
    9 GND
    10 ? 11
    11 GND
    12 ?
    13 ?
    14 GND
    15 ?
    16 GND
    17 ?
    18 ?
    19 GND
    20 Pwr Switch 2
    21 “KEY”
    22 HD LED 4
    23 PWR LED - 5
    24 ? 13
    25 GND
    26 ?
    27 PWR LED + 9
    28 ? 8
    29 GND
    30 GND
    31 ?
    32 GND
    33 ?
    34 ?

    I hope this saves somebody an houtr or 2.

    Andy

  2. #2
    Constant Bitrate xpluis's Avatar
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    Last....... i spend 2 hours search this info on my mobo with multimeter and testing.


    Good info!

  3. #3
    Low Bitrate blackmz3's Avatar
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    It took me about that long to find it. I need to buy a multimeter.
    2008.5 White MS3 Sport

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  4. #4
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    How is everyone powering theirs? What power supply?
    This is the last piece of the puzzle for me so I'd appreciate some input.

  5. #5
    Variable Bitrate
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    Why not solder to where the switch goes into the MB?

  6. #6
    Low Bitrate blackmz3's Avatar
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    Quote Originally Posted by Jay_1.8t View Post
    How is everyone powering theirs? What power supply?
    This is the last piece of the puzzle for me so I'd appreciate some input.
    i had a m2-atx but it's not enough. im sending it back tomorrow to exchange for a ds-atx.
    2008.5 White MS3 Sport

    Cobb Shifter Weight | Cobb SRI | Cobb AP | Cobb Turbo Inlet
    HKS BOV(Recirc) | Defi Boost Gauge| TRZ Tranny Mount| F2 BSD | F2 Oil Baffle

  7. #7
    Low Bitrate blackmz3's Avatar
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    Quote Originally Posted by MAZDABOY View Post
    Why not solder to where the switch goes into the MB?
    because this way is easier and not as permanent as solder.
    2008.5 White MS3 Sport

    Cobb Shifter Weight | Cobb SRI | Cobb AP | Cobb Turbo Inlet
    HKS BOV(Recirc) | Defi Boost Gauge| TRZ Tranny Mount| F2 BSD | F2 Oil Baffle

  8. #8
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    Quote Originally Posted by the415 View Post
    i had a m2-atx but it's not enough. im sending it back tomorrow to exchange for a ds-atx.
    I ended up ordering Carnetix 2140 last night.

  9. #9
    Newbie psxnut's Avatar
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    Hi All,
    Great Forum,
    Just my input, I just built a carpc with the dell GX270 with the new M4-ATX 250 watt 12volt psu, hooked up to the front control inputs on the sub board using the info above all works great. Thanks for your great info.

    All the best
    psxnut




  10. #10
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    awesome, thank you for posting the pinout

    Thank you for doing the work! I bought a case with a coa only and can now use that case to build a good pc.
    I need to figure out how to mount a motherboard on the odd looking motherboard mounts.


    .......sorry, but I love Windows XP Home Edition and Bill.......

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