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Thread: Socket 7 Motherboard advice

  1. #1
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    Post Socket 7 Motherboard advice

    I am thinking about purchasing a Cyrix CX55301 based socket 7 motherboard for my carputer. Unfortunately, the person selling it knows nothing about it. Here is a picture of the board:

    Does anyone know anything about these boards? It seems to need a riser card for expansion slots, but I'm wondering if I would be able to use it without the riser. It has RCA connectors for audio + video as well as a S-SVHS connector, so it should be good for in-car use. It also has a parallel port, so I can hook up a character LCD.
    My other question is regarding the power connector. It looks to me like a LPX power conenctor, and I think I have an old LPX power supply from a Compaq Pressario PC I am no longer using. Should this work? I'm also not sure about what voltages LPX requires - would I be able to modify an AT power supply such as the Arise DC-DC to power this? Any advice would be great appreciated!

    Thanks,
    Mike.

  2. #2
    Retired Admin Aaron Cake's Avatar
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    Cool

    That looks like an awesome board. If you don't want it, tell the seller I'll take it.

    Anyway, I'd definitly go for it. Looks like exactly what you need. As far as power, it may just take regular AT voltages, but I am not absolutely sure. Once you have the board, it will be a simple matter to track down the manufacturer and get all the info.
    Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
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    "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

  3. #3
    FLAC
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    Upper Marlboro, MD 20772
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    Red face

    I hate to say this but stay far away from anything with Cyrix on it. I am not going to go into details of what sorts of problems you might encounter, but look for something in the Intel/AMD category. Cyrix=bad news dude.
    abcd-1
    Author of CobraI,II,III and now CobraIV.
    You can contact me on AOL instant messenger....nick is cenwesi or cenwesi3

  4. #4
    FLAC
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    Post

    Speaking of Cyrix I killed 2 pr-233's in this project. /me prefers intel or AMD

  5. #5
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    Post

    I am NOT going to be running a Cyrix CPU (I'll be using an Intel Pentium 200 CPU), but the motherboard does use a Cyrix chipset. I'm hesitant to go with anything Cyrix as well, but seeing as the MB has onboard RCA connectors, I'm willing to take the risk. Plus, the guy is only asking $10 for this thing, so there's really nothing to loose. Now if I can only figure out how to power it... I will let you guys know how I make out.

    Mike.

  6. #6
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    Post

    I think I've found more info on this board. The STB-400 on this page seems to be the same board - it's a set-top box. The only thing that bothered me reading this is that it comes with a Cyrix Media-GX processor. I know that these CPUs are socket 7. Does anyone know if other (ie. Intel) CPUs could be used on this motherboard?
    Apart from the CPU issue, everything else about this motherboard looks great.

    Mike.

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