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I am so confused about power supplies.

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  • I am so confused about power supplies.

    I was hoping someone could help me. I have a computer that i want to put into my car, but i dont know what power supply to buy. Here is a list of componets i have.
    MSI 915GLM-V Micro ATX Intel Motherboard
    Intel Celeron D 336 533MHz FSB LGA 775 64-Bit Processor
    G.SKILL 512MB 184-Pin DDR SDRAM
    Dvd rom drive
    160 GB full size hard drive

    Im going to buy a Lilliput touch screen and a BU-353 Waterproof GPS Receiver.

    What power supply could handle this system? Thanks

  • #2
    Well... some people have tried this and found it works.

    If not try this

    First rule of questioning, "Seek to understand & Then to be understood"

    Hope that doesn't sound to harsh, but really, that search button is useful as well as attractive
    www.debthelpexpert.org

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    • #3
      You could also check the related threads on the buttom of this page...
      Renault Megane...the OEM look

      The Lost in Europe Ford Escort

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      • #4
        most important thing to look up is your cpu power draw.

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        • #5
          and is that DVD Rom a laptop one or normal - cos a normal one will drink juice. eg 1.5A @ 5v and 1-2A@ 12v.

          BTW try my second link, there are loads of online calcs just waiting for your specs.
          www.debthelpexpert.org

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          • #6
            Originally posted by roadhog
            Well... some people have tried this and found it works.

            If not try this

            First rule of questioning, "Seek to understand & Then to be understood"

            Hope that doesn't sound to harsh, but really, that search button is useful as well as attractive
            link to Search. thanks
            duh, dont you think i tried that first?

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            • #7
              like roadhog said... "not to sound harsh" but there is PLENTY of information on this topic, search and I mean really search go through every page that comes up and you will find all the info you need... I would also use one of those calulators to determine the actualy power draw of your system and its gets alot easier from there
              Debating on installing a carpc in my Jeep.....

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              • #8
                Originally posted by AT7
                link to Search. thanks
                duh, dont you think i tried that first?
                Well, did you try the second link?

                What words did you try searching for?

                "online power calculator" works well for me.
                You plug in (excuse the pun) power consumption info and it tells you what PSU rating you need. Then armed with that knowlege check out the PSU FAQ which will run down all the usual suspects, or do a bit more searching on google perhaps. You have found the FAQs I trust?
                www.debthelpexpert.org

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                • #9
                  try here to find out capacities of the more common PSU's
                  Never let the truth get in the way of a good story

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                  • #10
                    That Celeron D 336 is rated at 84w nominal. That's a big load as far as CPU's are concerned. I believe that is an accurate wattage rating and it will probably climb to 95-100w max under full load.

                    Here's a quote from Wikipedia:
                    Upon release, the Prescott turned out to generate approximately 60% more heat clock-for-clock than the Northwood, and almost every review of it was negative. A shift in socket type (from Socket 478 to LGA775) was expected to reduce the heat to more acceptable levels, but in fact proved to have the opposite effect, with power requirements increasing by a further 10%. However, the LGA775 reference cooler and mounting system were somewhat better designs, so average temperatures were slightly lowered. Subsequent revisions to the processor by Intel engineers were expected to reduce average temperatures, but this never happened outside of the lowest speed grades.

                    Finally, the thermal problems were so severe, Intel decided to abandon the Prescott architecture altogether, and attempts to roll out a 4 GHz part were abandoned, as a waste of internal resources.
                    Not only does it draw a lot of power, but it runs real hot as well. I don't think it would be a good choice for a carpc at all. I wouldn't bother with a 160w PSU. The DSATX might run it, but even then it's hard to say. Zootjeff might be able to confirm if his DSATX will work or not on that CPU.

                    If you want to still try and run it and are willing to sacrifice some speed, you might try reducing it's performance. Can the FSB be lowered to 400Mhz on your mobo? If so, taking it down to 2K or so will knock 22 or so watts off right there and then reducing the voltage from 1.44 to 1.34 can knock another 8 watts off. At 1.24v you can take another 8watts off. It will run cooler as well.

                    The other option is to sell it and get something like a Celeron mobile chip. It won't be as fast, but it will run cool and use a lot less power.
                    1999 Black Pontiac Trans Am
                    CarPC's in F-bodies
                    How To Relocate Climate Controls on the 97-02 F-body Cars
                    (AMD Sempron 3000+, Opus 150)
                    Car PC system is out, Alpine system is in.

                    Comment


                    • #11
                      Originally posted by AT7
                      link to Search. thanks
                      duh, dont you think i tried that first?
                      No... no not really.
                      Audio: 4 * Rainbow Audio Germs + Infinity Basslink / Case: iStarUSA S3 / CPU: C2D P8700 / MB: Jetway NC64-LF / SC: ASUS Xonar Essence STX / RAM: Crucial 2x1GB 1066MHz / HD: MTRON 2.5" 30GB / DVD: Panasonic UJ-815B / PSU: Opus 180w / LCD: Xenarc 700TSV

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                      • #12
                        Actually, I have to defend AT7. True, there is a lot of info here on the different power supplies, but there is not much at all on certain processors. In fact, this whole forum is not very knowledgable when it comes to CPU's and their real world ratings. AMD and Intel use different ways to measure the wattage. Certain models get rated way too high, some not high enough. It's all very confusing.

                        I've been spending a lot of time over here:
                        http://forums.silentpcreview.com/
                        They are a community focused on quiet PC's for home theater use. When you think about it, some of our interests overlap. They've learned that you can reduce fan noise by underclocking, undervolting, and most importanly, starting off with efficent CPU's in the first place. An efficient CPU is going to produce less heat which means you need less fans or even a passive CPU heatsink. Sound familiar? We need those things as well because it reduces the PSU load.

                        For those interested, the new 90nm. AMDs rock. The Sempron desktops are rated at 62w, but are actually about half, plus they already are a bit overvolted. Dropping the voltage will typically get them down to 25w or so. So you end up with a 3000+ processor drawing 25w and costs about $90 AND fits just about any desktop mobo.

                        I'm getting one this weekend and am going to test it out for myself. If I can run a weak *** undervolted stock fan on the stock heatsink at max CPU load and the HSF barely gets warm to the touch, I'll be satisfied.

                        Later,
                        Jason
                        1999 Black Pontiac Trans Am
                        CarPC's in F-bodies
                        How To Relocate Climate Controls on the 97-02 F-body Cars
                        (AMD Sempron 3000+, Opus 150)
                        Car PC system is out, Alpine system is in.

                        Comment

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