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Thread: New carputer build, looking for feedback

  1. #1
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    New carputer build, looking for feedback

    I'm new to the forums here, but I have lots of experience with mobile and ITX builds. But one can't know it all, and feedback is critical, so that said...

    I'm working on building an ITX system for my 01 Hyundai Tiburon to replace the stock radio. It's a double din so everything should fit in the dash. Specs i'm considering:

    ITX
    4th Gen i7 (4771)
    16GB DDR3
    360GB SSD
    PCIe 3.0 graphics card.


    It's a lot of boom for a car PC, but the goal is to make it a gamer for on-the-go starcarft satisfaction. Which leads me 2 several distinct questions. First and most importantly, are there any DC-DC PSUs that would be able to push a rig like thus on its own? If not, is it wise to splice a few to get the desire Voltage and Amperage? More to the point, investing in 2 or 3 160 watt pico-psus. Keeping one dedicated to the ATX socket, and other(s) spice off the 12v leads to feed the motherboard's 8 pin and video card's 6 pin. Likewise I imagine cooling is going to a monstrous undertaking. For those that have done high-power dash installs, are there any recommendations?

    Thanx in advance!

  2. #2
    FLAC SNOtwistR's Avatar
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    Well you could find yourself an opus 360 I think a member is selling his in classifieds. http://www.mp3car.com/classifieds/15...ge-sale-3.html Another option is to use the little gizmo the mp3car store sell to(merge) power supplies to increase the supply wattage. hereisthe link to the gizmo http://store.mp3car.com/Mini_Box_Y_P..._p/pwr-046.htm They work good! SNO
    Last edited by SNOtwistR; 09-16-2013 at 02:25 PM.

  3. #3
    Constant Bitrate eugenweij's Avatar
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    one thing that can be a bit tricky is the PCIe graphics card, due to the vibrations your car produces while you drive it could generate errors as the connection isnt designed for anything like that, it may pop out of its slot
    View my worklog here

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    Either the opus or a m4-atx style power supply would work.

    But the m4-atx supplies have been known to be noisy in most environments so you will need some extra shielding and such.

    You may be better off trying to find a high powered laptop and using that if you truly need a gaming rig in your vehicle. As was already mentioned, you may find a PCIe card won't stay in place. You may have better luck if you use a ribbon cable style riser card but you will likely have issues regardless. You might be better off using the onchip video and getting a decent motherboard with onboard video support and foregoing the separate video card. That add on video card is going to be an issue when it comes to powering, cooling or stability.

    Rodney

  5. #5
    Maximum Bitrate rray's Avatar
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    I seen a build here recently where the guy used a PCIe extension cable so he could mount a gaming graphics card where he could get better cooling and a solid mount:


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    That's a great point and something I should have considered. The ribboned PCIe card is almost a must and resolves what eugenweij was saying.


    I made a previous post regarding my full build, car and all here, but it sat in limbo (probably because of the links, oops) for so long I came back and created this thread.

    As for what Rodney said, the laptop idea isn't bad at all, but it defeats the build a little as I need the computer to sit in the stock radio location. Without going into too much detail, there are lots of aftermarket goodies I already have added, and I am working on AC/heat control relocation as well, so the space I have available is very slim.

    SNOtwistR, do you think 15A on the opus 360 would be enough to push the board and GPU? I'm still shopping, but the last card I bough required 30A dedicated. I know they're less power hungry today, but I expected by half or so. That load share looks nice, but it's 12V in-out only, I'd have to research a bit on that to comment more.

    Thanks for all the feedback!

  7. #7
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    Yes rray, that is what I was talking about.. The ribbon cable will have much more give and may allow the graphics card to be less of an issue. Just have to make sure the ribbon cable can be solidly mounted on both ends and hope that the ribbon cable doesn't add noise into the situation as well. Most cards were not designed to run across ribbon cables like that so they may have issues but worth a try anyhow.

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    I can't imagine a short cable would affect data transfer to terribly. Either way it's a good insurance policy.

    After researching a bit more it seems more modern cards, despite increased output, require significantly less power. Specifically pertaining to the video card, something like a GTX 770 commands more than 250 watts at full load. Now I have yet to find a break down of Voltage use, but I am assuming the majority of the draw is across the 12 volt leads. That means a draw of up to (or possibly more than) 21 amps on the 12V rail(s) alone. That being the case, even something along the lines of the opus 360 would be inadequate (single 15A 12V rail).

    edit: After researching a bit more, the card I'm specifically considering is being quoted as requiring 35 amps on the 12V.


    So is this a case of, set more realistic goals? Or should I invest in a power share and a pair of 360s just for the graphics card? Seems like an overkill response, but based on what I've found there's few other options for high end gaming. I can't imagine I'm the only one to come across this issue.
    Last edited by Pilk; 09-23-2013 at 03:44 AM.

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