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  • Is my PC not getting enough power?

    Ok well, i've had my same CarPC running since last September. Spec are:

    -Full ATX Shuttle An35N Ultra
    -Atholon Barton 2500+ | Cooled by a Volcano 12 HSF
    -512mb DDR Geil with heatshield
    -Nvidia GeForce 4200 (something like this, cheap) [Used to run an ATI 9600xt]
    -120GB Samsung 7200rpm IDE
    -GPS USB antenna
    -OPUS 150w DC-DC
    -Liliput 7" TS [Runs off the OPUS as well]

    Now i have my audio going out from the PC to the back of a Sony HU. Since about a month ago my PC has been acting up though. Sometimes it would just straight up shut-down after running for any given amount of time. I'd be cruising along the highway and it just pops off and doesn't come back on. However the green LCD in the OPUS would blink normally as if the ACC wire is off (as it does when my car is off), but it wouldn't come back on unless i unplugged the opus for like 30 seconds then plugged it back in.

    Then the PC would start to boot up and just completely shut off before booting, or right as my front-end loaded. When i would unplug the OPUS's white plug i noticed it was very very hot, and today i looked at it and the main 12v (red, postive) pin on the male end (with the wires coming from the battery and my ACC) is brownish, not white like the others. I'm guessing it started burning a little bit or something. It's not melted, and the PC will still boot up but either completely shut down in 1 second (doesn't normally shut-down through windows) or lock-up. I have 8-gauge wire running from my battery to the Opus and 8-gauge for the GND wire as well, and even my ACC wire is 8-gauge to the Opus.

    I have my stock battery in my car, which is very weak i'm guessing. It could only run the PC at shows and stuff for like 30 minuted then i'd have to start the car to recharge it. I don't know why this has recently started happening though, cause i had 0 problems up until this. Around the time i installed a 17" Dell LCD roof-mounted this kind of started happening. The LCD is ran off it's own 130w(I think) inverter, but i have a VGA Y-cable coming out of my PC to the Lili and this Dell. This is why i think it's a power issue.

    What should i do?

    also, ever since i started running GPS on my CarPC i've had a wierd problem with it. Sometimes i'd be running on the highway and it would have a perfect signal on a clear day, and all of the sudden it would loose it and my PC would say that there is no GPS device attached to it. But the GPS was still plugged in and the red LED was solid on it (meaning no signal). Could this be a power issue as well? Like 5 minutes would go by and it would get a signal again. Thanks
    CarDomain
    06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

  • #2
    I would say that it could possible be a heat issue. Dont take me up on that thought. Have you checked the voltage of the power and ground when you say when you start it up it shuts off after a min. Well get a multimeter and check the voltage when the pc is turning of. If it drops then it is prolly your battery.
    2002 Mitsubishi Galant
    Progress: 90% [-▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓- ->

    Carputer Specs:
    Via M10K
    512mb Ram
    60GB HDD
    Souund Blaster Audigy2 NX
    OPUS ITX PC Case

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    • #3
      I had a similar problem with my Opus. I would be cruisin along, and then my PC would just power off for no reason. My opus would blink as well. Dunno if it was an opus thing or what, but I got rid of that and got an M2-ATX and everything seems good so far.
      Tidder

      Try RevFE
      The best resurrected frontend I've ever used, period.


      I Wish I could ban people

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      • #4
        Difinitely, your setup need more juice on 5V rail. 10A (13A peak) is NOT enough.
        Solution: buy or build a 5V POL to help it out.
        2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
        89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
        Y2K Accord Dell GX150
        RoadRunner is the best FE PERIOD
        EmoRebellion is a SCAMMER

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        • #5
          Originally posted by MatrixPC View Post
          Difinitely, your setup need more juice on 5V rail. 10A (13A peak) is NOT enough.
          Solution: buy or build a 5V POL to help it out.
          Ok, lost me here lol ... last year i would've know what your talking about but my air suspension project erased all my CarPC knowledge

          What is a POL? Where can i get one or how do i build one? What all runs off the "5V rail"? I forget that one but i remember reading about what runs off the 12v and 5v rails. Thank you!
          CarDomain
          06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

          Comment


          • #6
            Originally posted by Cheekz185 View Post
            I would say that it could possible be a heat issue. Dont take me up on that thought. Have you checked the voltage of the power and ground when you say when you start it up it shuts off after a min. Well get a multimeter and check the voltage when the pc is turning of. If it drops then it is prolly your battery.
            I'd imagine it is a heat issue but i have a Volcano 12 (5500 rpm fan i believe?) with copper heatsink and Artic Silver 5 paste on my CPU. Not to mention that during the summer i'm always running with windows up (15% tint all around) and AC on, and i have my floor vents on which my PC is right up against under the passenger seat. My case is a standard full ATX tower that i chopped up to fit under the seat .. so it's like 40% of a case lol, and just the metal work .. so ventilation is not an issue.
            CarDomain
            06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

            Comment


            • #7
              First, ventilation could still be a problem, and the heat may not be just as it relates to your CPU, there are lots of chips on the board that when/if they get hot, you will crash the computer. Are there fans venting the pc case?

              Also, did you run a power calculator on your system. Check the faq section for various sites. You need to confirm that you are not overloading ANY of the power supply rails, not just being under the total wattage.

              Michael
              ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

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              • #8
                POL is a Point of Load deves that supplys a 5v line. All you need to do is input a 12v +/- and ACC and then it outputs 5v. So it takes a drain off of your PSU.

                http://store.mp3car.com/ProductDetai...Code=PWR%2D022
                2002 Mitsubishi Galant
                Progress: 90% [-▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓- ->

                Carputer Specs:
                Via M10K
                512mb Ram
                60GB HDD
                Souund Blaster Audigy2 NX
                OPUS ITX PC Case

                Comment


                • #9
                  Actually, the Opus 150w PSU is likely underpowered for that setup.
                  The Barton 2500+ has a max potential draw of 53.7w. The Opus 150w only has 60w available on the 12v rail.
                  Add in the video card and a 3.5" HDD, and you're definitely taxing the 12v rail of the Opus.

                  Options:
                  1 - Underclock the CPU or use a comatible CPU witha lower power draw, possibly a mobile version of the CPU.
                  2 - use onboard video (if available)
                  3 - Switch to a 2.5" HDD

                  Read this to understand how I arrive at this conclusion: http://www.mp3car.com/vbulletin/showthread.php?t=68636
                  Have you looked in the FAQ yet?
                  How about the Wiki?



                  Under normal circumstances, a signature would go here.

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                  • #10
                    Originally posted by Wiredwrx View Post
                    First, ventilation could still be a problem, and the heat may not be just as it relates to your CPU, there are lots of chips on the board that when/if they get hot, you will crash the computer. Are there fans venting the pc case?

                    Also, did you run a power calculator on your system. Check the faq section for various sites. You need to confirm that you are not overloading ANY of the power supply rails, not just being under the total wattage.

                    Michael
                    Thanks for the calculator info, i'll check that. I can't really run any case fans because there's not enough case to put a fan on lol ... this is how open it is:

                    From back seat shot:



                    From side (ouside of passenger-front side):



                    Front view (under front-passenger seat):




                    Now the 5.25" DvD drive was only used at one show, so that's not connected and hasn't been for a long time, and my HDD was only like that for a couple of weeks ... since then i mounted it vertically along the wall in the third pic where 2 case fans *could* go. This setup has been running fine for several months up until now ... but granted it was during the Fall, Winter, and spring time ... since the summer it's become an issue. I guess i need to build a mini-ITX system with a mobile CPU
                    CarDomain
                    06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

                    Comment


                    • #11
                      Originally posted by Cheekz185 View Post
                      POL is a Point of Load deves that supplys a 5v line. All you need to do is input a 12v +/- and ACC and then it outputs 5v. So it takes a drain off of your PSU.

                      http://store.mp3car.com/ProductDetai...Code=PWR%2D022
                      Thanks! How does the POL know when to turn on/off? I'm guessing it has some sort of connection to the MB? Or does it come on with an ACC wire like the OPUS itself?
                      CarDomain
                      06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

                      Comment


                      • #12
                        Originally posted by DarquePervert View Post
                        Actually, the Opus 150w PSU is likely underpowered for that setup.
                        The Barton 2500+ has a max potential draw of 53.7w. The Opus 150w only has 60w available on the 12v rail.
                        Add in the video card and a 3.5" HDD, and you're definitely taxing the 12v rail of the Opus.

                        Options:
                        1 - Underclock the CPU or use a comatible CPU witha lower power draw, possibly a mobile version of the CPU.
                        2 - use onboard video (if available)
                        3 - Switch to a 2.5" HDD

                        Read this to understand how I arrive at this conclusion: http://www.mp3car.com/vbulletin/showthread.php?t=68636
                        Thanks for the info! I can't use onboard video, there is none ; ; ... but i will most likely get a mobile CPU and see if that works until i can get a mini-itx board. I want to keep my 120gb IDE just cause of the space and a 2.5" HDD that size is too much $$$ for me, if they even exist?
                        CarDomain
                        06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

                        Comment


                        • #13
                          @ DarquePervert

                          I've been trying to find a 35w CPU for the last 15 minutes and i'm guessing they're not on the market anymore? I was wondering how this would do in a CarPC:

                          http://store.mp3car.com/ProductDetai...Code=CPU%2D001

                          I don't know how much of the 12v rail that would use, as i can't find it on the site you listed. If you could suggest a CPU to go with and maybe even a motherboard that would be great ... i want to just rebuild a new PC, if i can used my 512ddr still that would be great! Thanks
                          CarDomain
                          06' Scion xB Camo - CarPC_Worklog - My Air Suspension Setup [6-valve's, Cusco Camber]

                          Comment


                          • #14
                            Originally posted by vairu View Post
                            Thanks! How does the POL know when to turn on/off? I'm guessing it has some sort of connection to the MB? Or does it come on with an ACC wire like the OPUS itself?
                            It comes on with the ACC wire. It doesnt connect to the Carpc at all!
                            2002 Mitsubishi Galant
                            Progress: 90% [-▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓- ->

                            Carputer Specs:
                            Via M10K
                            512mb Ram
                            60GB HDD
                            Souund Blaster Audigy2 NX
                            OPUS ITX PC Case

                            Comment


                            • #15
                              Base on my search a while back and what I have in hand. Most/all Athlon XP and socket A mobo (without 12V input) take power from 5V rail. There was a big thread on one of amd forum (pc perspective????), the guy showed that the CPU get it's power from 5V rail and vitural nothing on 12V rail.

                              My setup, a 145W AC PSU ([email protected], [email protected]) has no problem power it, but the DSATX ([email protected], [email protected]) choke on playing DVD. When I added a 5V POL to power the DVD, there is no problem.

                              For connection, connect the POL's ACC to yellow wire (12V) from the PSU so that the POL turn on and of with the PSU.

                              If you want to buy, the forum's store has it.
                              If you want to build, search for "POL" I posted in power suplly forum.
                              2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
                              89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
                              Y2K Accord Dell GX150
                              RoadRunner is the best FE PERIOD
                              EmoRebellion is a SCAMMER

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