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Thread: Upside down motherboard?

  1. #1
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    Upside down motherboard?

    Has anyone mounted their motherboard flat, upside down? All the components face down, the pci cards hang from their sockets, the fans blow down etc.
    I am curious as to how much of a heat problem I will be having with all the parts inverted. I can add fans to supply cool air to the computer, I just don't have the room to mount the board rightside up.<br /><br />
    P4MST-890 775 MicroATX Pentium Dual Core E2140 , 80GB 2.5", OPUS 320W, MS GPS, SB EXTREMEGAMER PCI, 8" LILLIPUT TS, 15" NEC TS, SIRIUS USB PC INTERFACE, STREETDECK, KICKER ZX850.4, KICKER 2500.1, 2xKICKER SS65.2, 2xKICKER 10"COMPVX

  2. #2
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    The heat sinks will not work properly, bad idea.

  3. #3
    FLAC greatwhite's Avatar
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    Quote Originally Posted by mezz64 View Post
    The heat sinks will not work properly, bad idea.
    yup.

    Same reason you don't mount amplifiers up-side-down.
    For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
    Leonardo Da Vinci

  4. #4
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    Ok, that is the problem I was anticipating, looking at the motherboard though, there is only a heatsink on the northbridge and the cpu. Since the cpu has its own fan, if I install additional fans to supply constant air movement around northbridge I am hoping it will be ok. Redesigning the enclosure so that it sits rightside up is a major redesign at this point.
    P4MST-890 775 MicroATX Pentium Dual Core E2140 , 80GB 2.5", OPUS 320W, MS GPS, SB EXTREMEGAMER PCI, 8" LILLIPUT TS, 15" NEC TS, SIRIUS USB PC INTERFACE, STREETDECK, KICKER ZX850.4, KICKER 2500.1, 2xKICKER SS65.2, 2xKICKER 10"COMPVX

  5. #5
    FLAC greatwhite's Avatar
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    you're gonna induce a fair amount of heat into components that are not designed to shed it (ie: pcb etc). It has to due with how heat radiates (IE: rises) more than airflow. Airflow will cool surfaces, but the heat will still travel up inside the components, reducung the effectiveness of heat sinks and fan cooling.

    Will it cause a problem? Maybe, maybe not...........

    Overheating, component failure/shortened lifespan, melting and burning are possiblitities.

    Personally, I wouldn't take the chance.

    Your call..............
    For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
    Leonardo Da Vinci

  6. #6
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    My view, The above replies are valid.

    With the set up I run (low power and heat) upside down is likely fine (I have not done it though).

    Any way, more power and heat increases the risks the prior replies pointed out.
    TruckinMP3
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  7. #7
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    Thats what I'm trying to figure out, as you can see in my sig, I've got a dualcore system, but its the new lowend 1.6ghz model so I'm hoping I can underclock it a bit and keep the heat low.
    P4MST-890 775 MicroATX Pentium Dual Core E2140 , 80GB 2.5", OPUS 320W, MS GPS, SB EXTREMEGAMER PCI, 8" LILLIPUT TS, 15" NEC TS, SIRIUS USB PC INTERFACE, STREETDECK, KICKER ZX850.4, KICKER 2500.1, 2xKICKER SS65.2, 2xKICKER 10"COMPVX

  8. #8
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Quote Originally Posted by waltwalt View Post
    Thats what I'm trying to figure out, as you can see in my sig, I've got a dualcore system, but its the new lowend 1.6ghz model so I'm hoping I can underclock it a bit and keep the heat low.
    Be aware, (I am not suggesting you can get away with it) your set up is many generations newer / more powerful / power hungry than mine the celeron 300a generates less than 20 watts of heat

    I have a hamster power system. It runs on less than 90 watts of power including the desktop size monitor on the 12 volt rail.

    That is not true for your hardware......
    TruckinMP3
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  9. #9
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    Heh, certainly not, my CPU is rated at 65W I think, I'm hoping underclocking it will run at around 1.10V rather than 1.25V and save myself 15W or so. Noting that my system is many generations newer brought to mind that the computer probably has all sorts of builtin thermal detection/throttling capabilities, and thus, should warn me prior to giving up the magic smoke. And worst case scenario I'm out ~$200 for the CPU/Mobo.
    P4MST-890 775 MicroATX Pentium Dual Core E2140 , 80GB 2.5", OPUS 320W, MS GPS, SB EXTREMEGAMER PCI, 8" LILLIPUT TS, 15" NEC TS, SIRIUS USB PC INTERFACE, STREETDECK, KICKER ZX850.4, KICKER 2500.1, 2xKICKER SS65.2, 2xKICKER 10"COMPVX

  10. #10
    Self proclaimed spoon feeder TruckinMP3's Avatar
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    Yikes.... $200 is an expensive bet in my world
    the MB I use is literally less than $10.00 shipped
    TruckinMP3
    D201GLY2, DC-DC power, 3.5 inch SATA

    Yes, you should search... and Yes, It has been covered before!

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